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91 chevy 1500 surging idle?
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91 chevy 1500 surging idle?
During that period the idle may be higher idle than normal. Chevy Forums FREE technical assistance for your restoration and repair. When driving the car, it has a surging feel from 2,000-2,800 rpm. 0 V8 Initial Start Up Rough Idle - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5. I have a 91 chev 4x4 truck that had a 305 engine in it. 1991 Chevy 1500 with 5 Runs rough and surges at just above idle. I actually replaced O2 first and that fixed the dropping into open loop and I got past emissions as it stayed closed loop in idle and didn't surge. 4-mile stream of southern Kansas, has two branches. As you monitor the lab. 1991 CHEVROLET SILVERADO. Remove the IAC solenoid and test it for dead spots ,the plunger is most likely stuck on one position. Sometimes you can clean the MAF which can help but we have found replacing the mass air flow sensor is best. I have a 1996 K2500 6. 9L V8 (from a 2000 Dodge Durango) that was swapped into my 2000 Jeep Wrangler TJ back in 2006. When it has happened, (only 3-4 times so far in the last week or so), I have had it sitting idling for 30 seconds plus, and all of the sudden it will start surging up and down in the RPM's. Bad spark plugs are one of the leading causes of a lack of acceleration in Chevy vehicles. If you're idling longer. Oct 9, 2010 · Re: 1990 chevy silverado 5 Hi cmorphis. Average failure mileage is 950 miles GM Fuel Pump Lawsuit Affects Chevy Equinox, GMC Terrain news | 52 days ago; 101 posts · Joined 2004 Depending on your mileage, you should think about changing the plugs. 7 tbi when at idle it has a low to the idle. 3 v6 Kodiak topkick Q&a: 1991 chevy silverado wiring diagrams & more. we do have them ready to ship if i can help at all :drink When you unplug the map sensor it runs ok but smells rich. You either have a bad solenoid or the computer needs to be replaced Photos. So I had to take the heads and intake manifold off for cleaning. The 2017 Chevrolet Silverado 1500 has 55 problems reported for surges and jerks. Revving seems normal. Again, this can vary depending on the specific model and other factors. 7l TBI surging idle stutters Jump to Latest Follow 4K views 4 replies 4 participants last post by OpalLacod May 7, 2021 Badcraig Discussion starter 5 posts · Joined 2021 #1 · May 6, 2021 1 Idle issues has to be one of the most common issues that I get contacted about. Advertisement Long before satel. Chevy Silverado Forum (GMC Sierra) 2008 Silverado 1500 idle issues. 51 posts · Joined 2010 I have a 94 chevy 1500 5. the_experience3006 ·. I have replaced pluga, wires, distributer ECM and o2 sensor. I have a 2003 GMC Sierra, 5 For about the last month I have been battling an intermittent rough engine idle. SOURCE: 91 maxima wont shift out. Idle is 500 rpm after warm up. Truck Trend Garage: 2004 Chevrolet Silverado Idle Surge Continues Alex Steele Writer Jun 22, 2012 Bad Boy: The 2025 Ram 1500 Tungsten 4x4 High Output Goes Hard 14071 posts · Joined 2009 more than like that is a bad FPR (fuel pressure regulator). This is normal for old trucks as my sisters car idles the same and she has a 4cylinder First make sure that the trucks temp is at normal operation. Surging idle while in park. 3L CPI, Auto) had a surging (jolting,dunno). When I bought it the guy said it had been sitting for 2 years. Otherwise everything else is normal, idle, normal driving, the surge only happens very rarely By no means is. So the issue is it starts surging when coming to a stop and sometimes stalling after driving at highway speeds, like taking an exit off. I'll turn the key off and take it out and the car will act like it's dieseling on as if it had a carburetor. 7 TBI This is a very easy fix to possibly remedy your idle problem Here's more on how to tell if a harmonic balancer is bad. i took it into the dealer and they replaced multiple clutches in the transmission advising there is a tsb related to the problem. I have a 1999 Chevy Silverado 1500 (5. post back your findings. Engine Surging: Symptoms Surging or misfiring. At the same time, the engine misses and the tach is sporadic between 2000 and 2500 RPM when in OD. of this, the truck will assume a steady very high 1400 RPM idle and stay there. 0 V8 Initial Start Up Rough Idle 3rd Generation Camaros 1991 Camaro RS LO3 5. This is normal for old trucks as my sisters car idles the same and she has a 4cylinder First make sure that the trucks temp is at normal operation. Even with this, once you get to highway speed, the truck ran but felt like. I just replaced the Idle Air Control valve because i was told that could be it. 1990 5. Start engine and immediately shift into Drive; let idle for 10 minutes. 0 is running lean, the exhaust gas will have more oxygen so the O2 sensor will generate less voltage. I decided to get a scanner. 92 GMC 1500 5. maybe a vacuum leak in my DIY intake? A sputtering engine can indicate a number of problems. 8697 posts · Joined 2010 1991 Suburban said: My truck is a 1991 V-1500 Sub, 5. The CEL came on and threw a P1101 & P0106. It has 187,000 miles, with a stock 5 For some reason when its idling it "lopes". It took me a while to figure out what was specifically wrong, but about 5,000 miles ago, I suffered the dreaded plenum plate/gasket failure. #9 · Sep 4, 2007 (Edited) Re: 95 Chevy S-10 4. What causes rough and surges at just above idle in a 1991 Chevy 1500 with. This is a video about rough acceleration rough idle low idle and possible stalling The idle surging will usually go from around 800 to 1500. on startup engine surges up & down to the point of almost shutting off. 7 tbi when at idle it has a low to the idle. 3L TBI runs won't idle well and runs rough (Topic#326051) N263 Forum Newbie Posts: 8 Loc: Kansas Reg: 06-28-15 User Info Send. Question type: Maintenance & Repair the idle goes from about 800 up to 1200 after the engine warms up. Then start the engine and set the idle speed. post back your findings. This can happen when the generator is under load or when it's simply at idle. The IAC solved that problem for me. A popular car modification is the stereo system. I started with a fuel filter and alot of fuel treatment. What causes intermittent death in my 91 Chevy 1500 4BY4? WORKING ON MY 91 CHEVY 1500 4BY4. Similarly, if your engine struggles to idle efficiently, it could also be a result of a damaged throttle position sensor. Inspect the flexable fuel lines from the tank to the fuel pump, if there is even the tinest air leak, surging, hard starting, and infrequently small drops of. 'nuff said! JR Nation Email Report kboard Newbie Posts: 8 Reg: 04-05-08 AUTOMATIC I have a 1995 Silverado (K1500, V8, Automatic, 231k miles) I am having trouble with the truck all of a sudden. 3ltr engine and 119000 miles. The good news is in many cases, engine surging can be repaired with little cost. Before the install it idled fine. The rpm jumping or surging is your fuel pressure regulator If you had EFILive you can go in the scan tool software and go to DVT controls, select desired and actual fuel rail pressure pids, and you can manually ramp up the fuel rail pressure at idle. At this point in the pandemic, we shouldn’t need to tell you (again) why it’s important to wear a face mask while on a plane. Take a look at part 2 of rough running. 1 post · Joined 2014 I'm having the same issue as well3l v6 auto trans. And 64PSI engine at idle while at temp Cleaned MAF using a MAF cleaner Clean the throttle body with a TB cleaner. High idle random surge buck miss on a 1988 Chevy Silverado 5 Some throttle position sensors are a different configuration so make sure you get the correct part. how much does a csx train conductor make There are 7 signs that can tell you when your MAP sensor is broken. 5. Then turn each screw in (lean) about roughly 1/32-inch. To determine if it's the converter or not drive it at 45 MPH and when it starts surging press the brake pedal down about 1 or 2 inches. Usuallly it fires right up and idles very nicely. 1999 Chevy express 1500 surging idle Question Just bought a Chevy express 1500 that would not start. Clogged Fuel Injector. If the IAC is working properly, the idle will come down on it's own after several minutes of high idle. For example the 2015 Chevy Silverado 1500 with a regular cab and long box weighs 4,68. 91 gmc idles rough and engine surges when driving new engine mostly new sensors and vacuum lines. All Lights Pulse/Flicker & Rough Low Idle. Another Update, It looks like internet and my repair book is wrong on the subject of MAP sensor voltage. Surging and high idle on 94 silverado. Chevy Suburban Forum (GMC Yukon XL) 3L Rough Idle, Surges when braking, no codes 1997 1500 5. By clicking "TRY IT", I agree to receive newsletters and promotions from Money and its partners New research looks at how alone time can spur rumination — a symptom of depression — in some people, but not others. The RPM's vary between 50-100. I have a 1991 Chevy S10 with the 4 When the problem first began, it felt like just bad gas. It idles fine and runs fine at all throttle positions except about 10% TPS. etsy ugly sweater (NASDAQ:DWAC) shares jumped 6610 on Monday amid recent reports suggesting Donald Tr. Then start the engine and set the idle speed. It will sometimes idle rough, and/or stall at red lights, stop signs, or when turning when the transmission downshifts to a lower gear that drops the RPMs. This just cropped up this morning while leaving for work - the idle is very rough and sits about 500 rpm with the AC off. Helping you find the best home warranty companies for the job. 3? Does it have one? Having idle issues with my truck, I turn it on and runs for about 2-3 minutes at around 500-650rpm and then it slow starts to go down to around. Surge idle 2 JK, it's my project truck. -checked Idle Air Controller, good. Which I'll never go back, lol. Truck idels rough and stalls when put in gear. 2 million seed round led by Surge, Sequoia Capital's rapid scale-up program. I'm struggling with a surging motor. started bucking, rpms rapidly going up and If I try to push on gas it eventually. Apr 9, 2018 · Customer complaint bad gas mileage and a surging condition at idle, sometimes. Had at two different dealerships, and no one after every possible other check could not fix or find the problem. 1991 Camaro RS LO3 5. Italian auto giant Fiat is placing another big bet on the open-mindedness of American car buyers. 3 tbi is a great truck super reliable short of a couple minor commonly known issues now and then. The rest of the time it starts surging immediately. Remove the air cleaner housing and disconnect all vaccum lines from the air cleaner. ) I have been experiencing a surging idle with stalling at stops or as I slow down. Re: 1990 chevy silverado 5 Hi cmorphis. Model specific subject matter experts, classified ads and more Suburbans, Blazers, Tahoes » 91 350 tbi issues Previous Bottom Next; Page 1 of 2 : 1: 2: Username Post: 91 350 tbi issues (Topic#249910) tardisguy Contributor Posts: 181 Age: 39 Loc: San Antonio, TX Reg. lilly grove missionary baptist church 7 automatic and bought it. I have a surging idle all the time nearly / rough idle especially when first starting the vehicle after sitting a bit; while occurring Rpm's fluctuates between 500-800 mostly but sometimes however can reach 1000-1100 on the high end of of the rpm oscillation and from what I've noticed from times I paid close attention to it, after. So the issue is it starts surging when coming to a stop and sometimes stalling after driving at highway speeds, like taking an exit off. I had not tools or experience to tell me this. so I went ahead drained the anti-freeze replaced the lower radiator hose, the 2 transmission cooling line hoses, and installed a thermostat (which the. 48 Answers. surging idle, has to be something simple The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board 1991 CHEVROLET SILVERADO7L Ive got a 91 silverado 350 with some idle problems. Jump to Latest Follow 41 - 60 of 64 Posts. Give it a shot, just make sure you get the right EGR. 10-18-17 06:05 AM - Post# 2711225 My '98 K2500 with the 5. 91 chevy 1500 wont idle. it won't idle correctly-most of the time it idles way too fast(1200-1500)then all of a sudden,it trys to idle down to about 500RPM and surges or dies!It has no stored codes or check engine light-also,the fuel milage is bad(10-12MPG)I have replaced the following: TPS,IAC,coolant sensor,O2 sensor,all vacuum hoses,EGR valve,cold start injector,plugs, i have a 93 chevy 1500 4. Burp throttle every minute or so to clear if needed reset idle to spec check and reset ignition timing reset idle to spec. This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve but always run a OBD2 (1996 and newer) or a OBD1 (1995 and older) fault code as well as the cleaning procedure. They will also happen during light acceleration when the overdrive is active around 2k RPM when cruising about 50 MPH. It basically almost dies out, and then surges back to life (probably a little higher than normal idle), then repeats continuously until you apply some throttle. Nov 8, 2009 · Recently bought a used 92 Sub with 5 It's my first GMC ever. Try running 2-stroke oil in your next batch of fuel to see if that clears. #1 · May 27, 2010 (Edited) This is a problem with my 2000 Blazer ZR2: This just cropped up this morning while leaving for work - the idle is very rough and sits about 500 rpm with the AC off. It will often stall when first started because of this. I have a 5 speed so I dump the clutch and the idle drops very low and rough 2008 chevy 1500 ext cab 4x4 sold 2011 chevy 1500 crew cab ltz (daily driver) 1996 chevy 1500 reg cab 4x4 project sold 2006 pontiac grand prix gxp (daily work commuter) 277 posts · Joined 2012 i believe that this generation of gm engines one of the best engines ever designed.
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Four circuits are used in order to control the IAC valve, allowing a precise amount of air into the intake manifold '91 TBI 350 surging at idle and stumbling at speed. Come join the discussion about. When the 5. It is a 91 chevy truck with the 350 (5 The truck has 190K miles on it and runs fine other than a misfire. Measure the vacuum level in the intake system with a. we do have them ready to ship if i can help at all :drink When you unplug the map sensor it runs ok but smells rich. My 2005 started having rough idle last year, so I did the normal maintenace and replaced the plugs -- they were nasty at 87k miles. 2008 Chevrolet Silverado 3500 LT crew cab 22. We have had it for about 9 mos and put about 7k on it. Doesnt stall when I give it a little gas and will run fine and idle fine when Ive been on the road for a few minutes. That's when the lights will pulse. During that period the idle may be higher idle than normal. 89 k1500 idle issues. The problem is that when I'm in overdrive or low gear on the highway the engine rpm surges up and down usually between 1500 and 1600 rpm while in overdrive. The reason why the engine will idle rough is because it's not getting as much fuel as it needs to idle and maintain the necessary engine revs. Common symptoms of a bad EGR valve include a lit check engine light, engine performance problems, and spark knock. This is not a new concep. I have a 1988 camaro 305 std, idles between 500 and 1500 rpm, runs rough, no power, seems to be burning rich, fuel pressure 18-22psi. Never would it be a good idea to idle a 11-1 engine at the 500-550 rpm range. Get ratings and reviews for the top 7 home warranty companies in Chevy Chase, MD. Model specific subject matter experts, classified ads and more Post: 91 TBI blazer surging/high idle (Topic#368062) Chris1234 Newbie Posts: 2 Reg: 04-01-22 Send Private Topic View Profile '21 Silverado 1500 4x4 5. sinking valley amish shops map The CEL came on and threw a P1101 & P0106. 3ltr engine and 119000 miles. Gave the P0014 and P0013 errors and recommened replacing the Exhaust VVT Solenoid and the sensor for the Exhaust Camshaft Bank 1. Jun 20, 2012 OK guys, I am out of ideas here on this truck. This will be a long post as I'm going to try and describe this issue and the things we've already attempted. This truck has about 2500 miles on it and for the past couple months it has randomly started surging or fluctuating RPM's at idle. Sometimes upon startup it'll go up to 1500/2000 RPMs momentarily and then possible start the bouncing from 300 to 700 RPMs. I have a 1991 Buick Park Avenue Here are the common cause of surges, cold stalls, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk. I have a 95 chevy 1500 4x4 5 It's been running good/bad for a few months. The 2017 Chevrolet Silverado 1500 has 55 problems reported for surges and jerks. The CEL came on and threw a P1101 & P0106. I am having a strange issue with my 1994 Chevy Silverado. I hope this helps!Also, the spot weld on th. If the engine is running rich, it will have less oxygen and the O2 sensor will produce a higher voltage. 1999 Chevy express 1500 surging idle Question Just bought a Chevy express 1500 that would not start. changing out the seems like forgotten idle air control on a chevy tbi 1543 posts · Joined 2019 You can take a spray bottle with water in it and spray the coil body (not the wires) while idling. bikini butt It's up and down about every 15 seconds. Your HHR's engine needs air, fuel, and spark to achieve optimum ignition. If you are in drive with foot on the brake at a stop you can feel it surging. Vehicle Data 2001 Chevrolet Silverado 1500. Swapped throttle position sensor, iac, fuel filter, cleaned throttle body, replced plugs, checked fuel pressur … read more There have been several posts on this topic but I'm going to throw mine out and see if anyone has some thoughts040 over comp XE cam, duration @230 / valve lift 491, lobe lift 327, range 1800-6000. Disconnect the distributor pick-up coil connector from the ignition module Verify the AC voltage output from the pickup coil is over 700 mV at a FAST cranking speed If not, replace the pick-up coil and install a NEW distributor shaft If the distributor tests OK, check all ECM powers and grounds. 1995 CHEVROLET TRUCK 2WD 153,000 MILES. This truck has about 2500 miles on it and for the past couple months it has randomly started surging or fluctuating RPM's at idle. 3 AFM Silverado w/66,000miles has been RPM surging while driving over the past couple weeks. 7L 4x4 3" lift 35" tires 1990 1500 5. 240k, have replaced TB with reman and new gasket and o rings, EGR and actuator, TPS, iAC, all faulty vac hoses, cleaned grounds to engine, body, frame, PCV valve seems to be working. 1993 GMC/Chevy 5. Misfire/Stumbling at low rpm, low throttle. It feels like the engine surges/rpms fluctuate. 1 post · Joined 2016 I have a 2003 GMC sierra 2500HD LB7 with the california emissions, My truck surges when at idle only in gear. 2001 Chevy 2500 HD LT trim extended cab 4 WD Stock motor/tranny LT315/75/17 BFG on H2's Tri fecta tonneau cover Winter Front cover on most of winter Bug guard Emergency Siren and strobe lights. If it goes up to 23k or 26k depending truck,then it most likely is the fpr acting. Mar 10, 2014 · 91 Chevy 1500 - shuts off while driving on hot days - need help. It idles at about 1000 when I'm in park and when I'm driving it will accelerate on it's own and rev higher than it should without applying any throttle. Aug 6, 2015 · Throttle position sensor voltage value will read in 0 Correct value at Idle (closed throttle plate) is MAP (the engine vacuum sensor) or Manifold Absolute Pressure read the vacuum level. Anybody had issues with idle revving or low speed surging? After car is drivento work or a ort distance and it sits for a few hours the idle after cranking moves between 800 to 12-1300 RPM. Went from low idling to the idle getting too low to keep the battery charged to the above mentioned issue. Vehicle Data 2001 Chevrolet Silverado 1500. You may also notice signs like a misfiring or stalling engine. 7 tbi when at idle it has a low to the idle. lpsg tiktok Just enough to turn on the brake light but not hard enough to apply the brakes. Disconnect the MAF (if equipped): does the idle smooth out? If so, you may have a MAF problem, if not, plug it back in and move to step 3. 3 and noticed that idle was surging between 400-600. Remove the air cleaner housing and disconnect all vaccum lines from the air cleaner. Then the rpms drop almost to the point of stalling and then it recovers to the normal idle. You could try this to test the MAP sensor 201,000 MILES. The coolant temperature sensor will also cause it to run rich when it gives up the ghost0L/AX-15/NP231, D30/D35 @3 17 Sierra 6. This was quite bothersome descending hills in low range/first. 3L w/6 speed w/66,000 miles. Had cruise control for over 40 years and could always feel the gas pedal go down when going up a steep hill. 92 k1500 Surging at idle still. 3 v6 it is surging real bad with a spuratic idle and stalling almost sounds like its missing i have alot of money in it fuel filter, idle air control ,tps sensor,map sensor, oem valve on the back of my throttle body i think its called, distributor cap,wires, and plugs tried to adjust timing no differnece looked at distributor rotor is new and looks like its spinning ok. 165. It vibrates more than any truck or car I've ever owned, and at times stutters like it's misfiring. Chevy SUV & Crossover Tech Forums. 1999 Chevy express 1500 surging idle Question Just bought a Chevy express 1500 that would not start. Does not run hot, but when the ambient temperature gets over 80 it randomly shuts off while driving, almost like someone switched the. tps sencor or maf sencor. First chev I've ever owned, recently converted from dodges. 7 tbi when at idle it has a low to the idle. Joined Sep 10, 2000 · 2,845 Posts #21 · Jun 4, 2008. Only show this user. I did a self scan of the emc and got code 32 from it so I replaced the EGR and it.
I actually replaced O2 first and that fixed the dropping into open loop and I got past emissions as it stayed closed loop in idle and didn't surge. To test, unplug and cap the vacuum line going from the solenoid to the intake manifold. Increased Offer! Hilton No Annual Fee 70K +. 7 ltr 350 small block. If allowed to idle - Answered by a verified Chevy Mechanic. Chevy Forums FREE technical assistance for your restoration and repair. If modulating the brake pedal causes surging, sound like a vacuum leak. hgelbooru Fuel - The ideal air-to-fuel ratio is 14. It has random multiple misfire at idle and bucks and jerks when in gear at idle. Bought a can of throttle body cleaner and took off the throttle body. 04-silverado. My 2012 ECO MT is a complete slug on 87 octane, to the extent that it feels like the engine is missing when under load. It does not do this constantly, but I would say almost the majority of the time. 5. The most effective tool in the world to stop a bad guy with a gun is a good guy with a gun! Aug 2, 2013 · Then turn the ignition to the off position, remove the jumper from the diag. cathy heavn This was quite bothersome descending hills in low range/first. The engine's computer has built-in logic that monitors the TPS feedback to make sure it matches up with information sent by other engine sensors. Take this quiz to see if you can recognize the most memorable '70s Chevys! Advertisement Adv. While my 91 Astro with TBI starts right up and runs/drives in a manner that would be acceptable to many, there are a few issues but exhibits a somewhat random surging of idle speed. nico robin teasing chopper 3 TBI serious flooding. This tutorial addresses a very common problem I've seen on the 1987-1995 GM 40L, and 5. 1L has started surging while idling every now and then. May 13, 2015 20LTZ13 said: ok so for awhile now my sonic surges when the a/c is on when the vehicle is idling.
during this cold weather i noticed when warming up the truck the idle is surging up and down. Don't drive it until it's plenty warm. Average failure mileage is 950 miles GM Fuel Pump Lawsuit Affects Chevy Equinox, GMC Terrain news | 52 days ago; 101 posts · Joined 2004 Depending on your mileage, you should think about changing the plugs. I have cleaned the throttle body and maf sensor and still have the surge, idle speed drops to about 400 and jumps back up to 650 and drops back down again A forum community dedicated to Chevy Impala SS owners and enthusiasts. throttle body seems to be off a 92. Stalling, surging, or hesitating while idling all can be caused by this unassuming sensor. It sometimes takes 3 starts for it to go. 7 parts air to one part fuel. I have a 355, 10:1 compression, vortec heads, mild comp cam with a Holley 750. The CEL came on and threw a P1101 & P0106. Engine surging is different from a difficult start or a no-start problem. Fuel is premium (not ethanol free though). armor dress Jun 20, 2012 OK guys, I am out of ideas here on this truck. It turns right over again, with no check engine light. The engine fires up ok, but does take feathering the gas for a while to get a solid idle without dying. I'll turn the key off and take it out and the car will act like it's dieseling on as if it had a carburetor. This may result in an unusually high or low idle speed, or in some cases a surging idle speed that repeatedly climbs and falls Check Engine Light comes on On the other hand, an IAC valve that sticks in the open position will create an idle speed that's too high. It seems to be worst in the morning when the engine is cold (Minnesota Winters) but also shows up when the engine is at normal operating temperature. Hey there I have a problem I have never seen happen. Here's a handy search engine for searching salvage yards for the parts you need. Also check the electrical connector in the tank to the pump. Most Chevy's have a spark plug replacement interval of 60,000 to 80,000 miles. 7l throttle body fuel injection. One of the most common issues to plague generator owners is the dreaded "surge" or "revving up and down" of the engine. This is getting pretty frustrating when I'm trying to stop and there's snow on. To test-- disconnect and plug the vacuum line going into it, problem goes away, EGR replacement, problem doesnt, break out the book and keep researching. Bad spark plugs are one of the leading causes of a lack of acceleration in Chevy vehicles. 5L Surge at a steady Idle 2004 GMC 2500 4x4 6. P0106 is a diagnostic trouble code (DTC) for "Manifold Air Pressure (MAP) Barometric Pressure Sensor Electric Circuit Output Range and Performance Problem". I have a 91 Chevy 350 TBI in my truck. Idle surge - Please help! Jump to Latest. Watching the fuel pressure at idle stays around 5200psi and when it surges up goes to around 9000psi. 10-18-17 06:05 AM - Post# 2711225 My '98 K2500 with the 5. cpr certification arlington 7 TBI 4l60e 197000 miles stock with stock replacement parts. Before the install it idled fine. The good news is in many cases, engine surging can be repaired with little cost. 24 posts · Joined 2011 I have a 1992 Chevrolet K2500 350 tbi that idles high about 1200 to 1500 rpm sometime's will idle about 800 rpm. I have a 91 Silverado K1500 4x4, 5. Asked by coyboy350 Jan 05, 2015 at 10:20 PM about the 1994 Chevrolet C/K 1500 Silverado Extended Cab 4WD. My car is having the same symptoms (2014 Impala new style LT 3. Air - The air entering your car's engine must be metered by the MAF or MAP sensor. I have a 91 Silverado K1500 4x4, 5. Then the rpms drop almost to the point of stalling and then it recovers to the normal idle. When the hesitation hit, it dropped to -20, -12, even as low as -4 degrees, only to instantly go back to -33 when the hesitation stopped. Remove the air cleaner housing and disconnect all vaccum lines from the air cleaner. 1991 Chevrolet C1500 Cheyenne 5. Plug the vacuum lines with golf tees or other suitable item.