2005 Chevrolet Impala 149,000 mi, Visitor. Engine Surging Symptoms And Causes: Symptom. Diagnosis with GDS2. Only show this user. When I got my truck the first 5,000 miles the city mpg was really bad, and then got better. The truck DOES NOT REV much higher in 5th than 6th. SPONSORED LINKS Was this answer When we got the car it had a mechanical fuel pump with a electric in line red label holley pump wired into a toggle switch without a fuel pressure regulator. 71,900 miles. The crankshaft sensor is necessary for your car engine to run on most car models. Check bottom of tbi unit for a vacuum leak with choke cleaner they like to blow the gasket also fuel pressure should be 9-11 psi if lower then you may need a pump or filter. Failure Date: 04/22/2022. Here's the specifics: - It only seems to do it between 30-50 mph. Sep 5, 2007 (Edited) Re: 95 Chevy S-10 4.3L TBI - Idle troubles. You will have to check if the IAC is working or not. The fix: Replace EGR valve. Problem: excessive corrosion internally on the Engine Coolant Temperature Sens. Faulty Crankshaft Position Sensor. The fix: Check and replace CV/universal joints as required. A bad manifold absolute pressure (MAP) sensor can upset fuel delivery and ignition timing. Vehicle has 55k miles on it and ih has been fairly reliable. 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. Dirty Throttle Body. A few weeks ago, I noticed that very occasionally, after the vehicle was warm, I would see a sudden full RPM dip to 0 while driving down the highway, but then the vehicle would return to normal operation. A multiple misfire can certainly cause the engine to surge. NO reason to have the truck shift to V4 for a very short distance. Chevrolet truck. While you are moving the engine is surging or misfiring. So I have a 95 TBI 350 with about 190K miles on it. Poor fuel economy. I still say there is something else going on in your computer system.. - 1999-2005 Pontiac Grand Am Most of the time the culprit is going to be the ignition system . 2012 GMC Acadia. Sometimes hesitates to accelerate. Depending on your vehicle model, your engine might experience one or more of these performance problems: Rich air-fuel ratio. If you let off of the gas coming to a stoplight and it stalls for a second or two and recovers itself, it very well could be a dirty throttle body that is causing the problem. New Delco O2 sensor on the way, (current one only has 30k on it). Lastly, engine misfires can come from a loss of vacuum coming from the intake system. The contact stated that while driving at an undisclosed speed with the cruise control activated, the turn signal was activated, causing the cruise control to inadvertently deactivate. 8) Bad Ignition Coils or Spark Plug Wires. Apr 30, 2009 My 1999 silverado with the 5.3 engine. Hello. Two class action lawsuits have been filed against General Motors for the "Chevy Shake.". 1. Here's a great YouTube video from EricTheCarGuy. The engine surge which makes the RPM go up and down might be caused by a defective or stuck idle air control valve or the IAC. Colorado. - The surges last for just a split second, but as soon as the RPMs . Make sure vacuum line going ot map sensor isn't soft an sucking together. First, it can be that your fuel is making its way to your engine correctly. Vacuum leaks in MAF systems will usually cause . 4L80E etc etc. Hi all- I have a 98 Chevy C2500 pickup (5.7L Vortec 350) that I am having a real frustrating time with. So far I have changed the spark plugs/wires, ingnition coils, maf sensor, throttle body cleaned, cleaned the fuel injectors and changed the auto control valve,changed the fuel filter. December 17, 2019 - GM Attempts to Sidestep Class Action Case. The most common reason a car shuts off while driving is a defective crankshaft position sensor. My 1995 Chevrolet Silverado truck had a hesitation problem, which we were able to fix by replacing some parts. Could this be something. SES is on due to cats, but is not flashing for misfire. I've noticed that while drivingnat a stable speed, for example, 50mph at 2k rpm, the car slightly revs up and down. The contact stated that at low speeds of 20-60 mph, the vehicle failed to accelerate with the accelerator pedal . Browse other questions tagged chevrolet fuel-system truck . 2015-2020 Chevrolet Tahoe. If these are flat, the problem is in the electrical system or the battery. The vacuum line to the valve must be removed. The defect causes the cars to shake, jerk or "hard shift" when the driver speeds up or slows down, according to the case. The idle control valve ("ICV") and throttle position sensors ("TPS") are prone to failure on all 4.3 engines, which can result in poor idling, engine stalling, bad acceleration, and other low-rpm running problems. Report. the motor will occasionally surge at crusing speeds between 40 and 60 mph. 11) Ambient Conditions. It started as little hiccups while driving, not like a surge, but I'd be cruising along and it'd hiccup- a sort of feeling like it didn't fire on a cylinder. Here's a great YouTube video from EricTheCarGuy. The contact owns a 2010 Chevrolet Colorado. The MAF (mass air flow) systems used on many cars measure the amount of air flowing through the engine's throttle valve (throttle body) and use that information to determine how much fuel to inject. Only show this user. Transmission problems rarely fix themselves and the earlier you do something about it, the cheaper the repair. Diagnosis with GDS2. My truck bogs down (and tries to die) when I give it gas to accelerate off of a stop. It acts like a dirty or clogged fuel filter or a slip in the tranny. August 30, 2019 by Jason. Misfiring happens when one of the cylinders of an engine's combustion cycle fails. I can smoke the tires off the line, no problem. The vehicle was able to restart after a few attempts and the check engine indicator remained lit. (Page 1 of 3) According to these lawsuits, the Chevy Shake appears in these affected vehicles: 2014-2019 Chevrolet Silverado. The oil could come from the corner of the intake more likely, unless this caused a vacuum leak it is not related to the surging, a full scan may be required to check the sensor inputs, they don't always set a code in the older vehicles. I thought it could be dirty injectors so I ran a bottle of sea-foam. The fuel injectors may be dirty. The truck is just ready to. This started as a surging while driving at constant rpms. 1. The idle control valve sits on the throttle body and is responsible for adjusting the . Pumping the gas does not help. I have experienced no SES lights. In late November, General Motors pressed Michigan District Court Judge David M. Lawson to dismiss a consolidated proposed class action lawsuit alleging the automaker's 8L90 and 8L45 transmissions are defective. tac surges when driving the car at 35mph . Road test the vehicle under light throttle acceleration at 55-65 mph (88-104 km/h) during steady state driving when the transmission is not actively shifting gears and monitor the following GDS2 parameters. These trucks were marketed under the GMC and Chevrolet brands, and the C/K included various vehicles, as well as a truck and two SUV models. turn 50K miles. Typically (if a filter problem is the cause), the "surging at a stop" happens when there is a sudden dip in line pressure. Pushing on the brake pedal will make it stop revving up and down. At 52k i change the sparks, air filters and a Gunk gas treatment. To top I off sometimes at idle gets very rough and will drop to ~3-400 rpms and a low oil light stop engine message comes on. 2. Excessive oil consumption is yet another issue that plagues the 5.3 engine. This places significant strain on the engine and the AC system. You could of course take the car to a mechanic who can connect diagnostic equipment and tell you exactly what the problem is. Report. 2021 Chevy Silverado 1500- Overview. While accelerating from a stop, or accelerating from various speeds such as 35 or 55, it will jolt during acceleration as if it is slipping between gears. 2018 silverado***** Brand new 300 miles the oil gauge holds at 40 lbs. Although they're most commonly associated with pickup trucks, the line also . I have a 2000 Silverado 4X4 Z71 5.3L that surges between 40-50 mph. fuel. It surges also between 45-55 mph. The check engine light is not coming on and there is no codes available. pressure while driving when I stop at a red light the needle drops to zero and stays there until I give it little throttle it the . It has a hard time with ANY load (even the A/C compressor). 10) Low Cylinder Compression. Along with the erratic idle, the engine has absolutely zero power. The truck has a NV3500 so the whole truck would surge. The bounce of the tachometer needle happens when speed is constant under little to no torque, anywhere between 30-58 km/h, the RPM ranges 1300-1800-ish {if I press or release the accelerator slightly the RPMs stay steady, and the bouncing tach needle stays steady}. There is often a backfire or two when this happens. In its motion to dismiss, GM zeroed in on each of the plaintiffs . Surging and high idle on 94 silverado. . I replaced IAC, CTS, TPS, ETS, EGR valve, EGR solenoid, FPR, Injectors, fuel filter, plugs, wires, Cap, rotor, pickup coil in dizzy . One note, I do recall when it started happening that I would smell gasoline for a few minutes after starting it while cold. The replacement cable comes with all of the cable anchors in the proper locations. Engine surging is when an engine starts easily and accelerates smoothly, however after a few minutes at a steady speed, it either surges in speed or misfires. Dirty Throttle Body. Have no idea what to do next. At highway speed 70-80 mph there is NO surging. Customer complaint bad gas mileage and a surging condition at idle, sometimes. Brad Bergholdt is an automotive technology instructor at Evergreen Valley College in San Jose. While driving down the road at a constant speed the truck feels like it has a surge to it or a jerk back and fourth sorta like its going forward and backwards while driving a constant speed, if I let off the throttle a little bit or give it a little more it stops but continues again once my speed levels out But that's a lie- especially when it comes to the 2017 Silverado, a pickup brimming . An internal combustion engine needs air, fuel, and spark in order to achieve ignition. experience a mild hesitation or surge with even application of the. So, any of these could be possible cause of engine surging: However, more 2019 Silverado transmission problems may get reported as the trucks pass the 100,000-mile mark. why is my tac surging up and down while driving at 35 mph? If an engine is not getting enough fuel (this is called "running lean"), due to fuel pressure (regulated by the fuel pump and regulator),. A dirty throttle body can lead to stalling in your Silverado. Examine the engine and transmission for loose or damaged vacumn hoses. Surging. Bad Belt: One often overlooked cause of a car surging with the AC on is actually a worn compressor belt. I bought the car brand new in November 2011. Very noticeable in second gear at about 25 mph. 1. When one or more of these variables is off it can lead to a rough idling condition. Common Causes That Lead to Car Surging when Accelerating Usually, there are three leading causes behind car surging when accelerating. Rpm tachometer jumps up and down. - The tachometer shows the engine surging <i>up</i> about 1-200 rpm. The problem may also be in the fuel system. I have a 2011 Chevrolet Aveo5 LT with a 1.6L Ecotec engine and a 4AT. Possible internal engine problems. For some scan tools enter VIN 10th "L" 3rd "C" 8th "K". 4) Vacuum leak. If the belt is stretched or worn smooth, it can slip during operation. While driving down the highway, without cruise control on, my truck sometimes surges, or seems to loose power for a moment and then catches back up. 6) Bad Fuel Pump. accelerator. Failure Date: 03/31/2018. Then it got . This is an improvement from 90 reported issues with the 2017 Silverado model. Transmission, Electrical System, and Exterior lighting issues among the top complaints received by the NHTSA from vehicle owners. Your cruise surge can be because your jetting is borderline too lean. We had an issue with fouling plugs (due to no fuel pressure regulator . 1997 GMC Suburban, 7.4L Vortec. if you t in off the supply line in the back of the throttle body it should be 9-11psi, but if your truck is surging at idle i would check for a vacum leak, and check over the basics like timing, check the cap (make sure the contact points ware the rotor meets are good) Additionally, the warning light failed to illuminate while the high-beam headlights . 4.3L Vortec ICV and TPS Failure. This weekend I put a new idle air control valve and o2 sensor in, and the symptoms still persist. 2017-2019 GMC Canyon. Dec 25, 2011 This just started when I step on the gas, the truck responds but i feel a surging motion, and it picks up speed really slow. If you skip ahead to the 2019 Chevy Silverado 1500, you will find 17 transmission problems in five categories, according to Car Complaints. The fix: Clean or replace fuel injectors. roonie 05-03-2012, 06:00 PM just thought i would post back with what i found. The car jerks when driving, especially when accelerating. It seems your truck has either an excessive vacuum leak and/or restricted exhaust problem; this causes rough idle and/or surge conditions. If moving at a steady speed, and I give the truck . Jul 10 2021. 2017 Chevrolet Silverado 1500. Chevrolet claims its Silverado is "the longest lasting, most dependable truck on the road.". My Chevrolet truck would idle fine and passed . 6 Causes of Car Turns Off While Driving. The contact owns a 2017 Chevrolet Colorado. - Truck is NOT throwing codes.. At one point it threw a P0174 which is Lean Bank 2..but no longer tripping any codes. The contact pulled the vehicle over to the side of the road. My ford f-150 the rpm gose . If you let off of the gas coming to a stoplight and it stalls for a second or two and recovers itself, it very well could be a dirty throttle body that is causing the problem. Second, it can be due to faulty torque converters. The problem may involve an annoying change (up/down) of engine speed while cruising at a steady pace, a low drop (or even cut-out) at idle or when approaching a stop, a wild high engine speed of several thousand rpm followed by a drop to near zero, etc. The motor surges on and off while I am driving. Also, it offers impressive fuel economy. As most drivers know, oil consumption is related to fuel economy. If you have installed a Fuel Injection system in your vehicle and are having some initial issues here is a quick checklist to work from to get you started. My friend has a 1996 6.5 turbo diesel I'm trying to help him fix. Write to him in care of Drive . The fix: Check compression to determine engine condition. Cleaned throttle body with no change in symptoms. In the guide below we show you the most popular issues and how to fix them, EV's also have surging issues which we address in this guide. It would happen quickly and would not be any sort of aggressive sputtering. - It only does it while I am trying to hold a constant speed (not accelerating / decelerating. General Motors is facing a class action lawsuit that alleges some of its automatic eight-speed Chevrolet, Cadillac and GMC vehicles have a defect in their transmissions. Check the instrument panel to see if gauges register. When I am driving usually I notice around the speeds of 50-60 mph my car revs up and you can watch the rpm's go up and down. If it does, readjust so that deflection is in the range 0.28-0.31 in (7-8 mm) for a used belt or 0.256- 0.295 (6.5- 7.5mm) in for a new belt. on how to clean a throttle body. Replacing the belt often eliminates the surge, and ensures better AC operation. 1988 GMC k2500 5.7l 350 4wd throttle body doesn't idle but dies after kicking it over in the morning and when it did idle it was not smooth. You may be in for a turbulent ride. An idle surge can be caused by multiple phenomena. I was told that the MAP sensor puts out 1.2 - 1.6 volts at idle and around 4.2 - 4.5 at Wide open. The surge follows what appears to be a dead spot or flat. There are quite a few reasons why your Chevy Silverado could be idling rough. I have noticed that when this is happening I'm idoling at about 2200rpms, and then the rpm's drop to about 1900 or so, then "surges" back up to 2200rpms. I am having a surging issue. 7) Bad Spark Plugs. Another Update, It looks like internet and my repair book is wrong on the subject of MAP sensor voltage. The tach fluctuates 50-100 rpms. While driving it, the engine surges as if I'm spiking the gas pedal, especially when I'm slowing down to a stop. To know if the fuel pump is bad or not, you need to check the fuel pressure. Cleaned throttle body with no change in symptoms. In fact, excessive oil consumption is so commonplace with the 5.3 Liter Chevy Engine- and it happens because of frictional loss- resulting in an increase in internal sludge the oil consumption. The truck idles smoothly, and it runs fine once it's above about 5-10mph or so. This Chevy Silverado 1500 easily handles the power of various 4.8L, 5.3L, 5.7L & 6.0L engines with 4 speed 4L60E & 4L65E. OBS, otherwise known as "old body style," refers to Chevy C/K trucks manufactured by General Motors between 1988 and 1998. The switch to winter formulation gas can make a borderline mix go a bit lean. I have a 1966 chevy nova with a 383 stroker. then sometimes it will suddenly just shut off as if I turned the key off. It stumbles as if it's missing a couple of cylinders when you accelerate. A dirty throttle body can lead to stalling in your Silverado. Check to make sure your check engine light is not on, or that it is on with the key on but Things to Remember. After about 10 min of this the service engine light comes on and throws an o2 sensor. I started losing oil pressure every once in awhile a couple months ago . Vacuum leaks can cause surging on some engines, but it depends on the type of fuel injection system. An alternative diagnostic for TCC shudder is to road test the vehicle and monitor commanded and actual TCC slip speeds. Symptoms: - Problem started slowly then quickly got worse over the course of a few days. Even get second gear scratch sometimes, no problem. And after the TC engages around the 60 km/h, like it's designed to, the tach . I basically have to crawl through any intersection until it picks up a bit of speed from idle. - The truck has a rough idle, almost as if it has an aggressive cam, idle sits around 550rpm . A new fuel pump will cost you $90 or more. EGR valve may be stuck open. 2017-2019 Chevrolet Colorado. I can hear the engine surging it is very noticeable, nothing imagined. The contact owns a 2014 Chevrolet Silverado 1500. Look also at the truck distributor and clean off the spark plugs and wires. You said you know what this was from - please elaborate. New Delco O2 sensor on the way, (current one only has 30k on it). Truck Won't Start: Check the gas gauge to make sure there is fuel. First off, 3,000 miles is way too early to start measuring mpg. With that said, power disruptions while driving also remain a common complaint. 1 Answer. What Cars Are We Talking About? Replace the ect sensor if still a problem then scan for codes. Surgeing. I perform all regular maintenance myself. Alright I need help. I figured out how to induce it by letting off the gas and quickly giving it 1/4 throttle and about half the time this will cause the engine to surge. While driving at a steady speed, the engine seems to "speed up" slightly or it seems to miss and buck. While driving 40 mph, the engine stalled and the vehicle lost power. I have a 2012 with ~92K miles on it. I use Mobile 1 5W-30 Full Syn and Mobile 1 filter. Asked by acadiadenali12 in Apopka, FL on February 26, 2015. Holley carbs run on the idle circuit up to about 2000 RPM at light throttle. When given a digital diagnostic, the vehicle scan will tell you there is an issue with the throttle body. 1996 Chevrolet Turbo Diesel 6.5 surges as if pressing accelerator in spirts. Took to a dealer and they stated nothing is wrong with vehicle.they suggested to clean the injectors. If you own a Chevy truck, take a look at this related article about GM ignition switch . Hesitation or surging while driving Lack of power and drivability Check engine light with codes for lean/rich AFR Fuel Pump Repair Solution Replacing the fuel pump is not cheap, so you should be replacing the filter periodically. The truck has 176k miles and already has a bad sending unit cuz the gague sometimes does not read. Transmission not locking up (or slipping) Vacuum leak EGR valve stuck open . This data is wrong. This means you don't have to be overly cautious with the removal of the old positive cable. on how to clean a throttle body. My 2002 Chevy Silverado performs the same way. . Sometimes hesitates to accelerate. The tachometer is just showing what the engine is already doing; it does not affect how the engine runs. Both of these can cause hard shifting. It loses power and idles down. Road test the vehicle under light throttle acceleration at 55-65 mph (88-104 km/h) during steady state driving when the transmission is not actively shifting gears and monitor the following GDS2 parameters. GM engineers can't seem to pinpoint the cause of a mysterious recurring issue in vehicles riding on GM's K2XX platform, which includes its full-size trucks . Bad MAP Sensor Symptoms. Put the spring scale 1/2 way between the alternator and crankshaft pulley, pull on it to 22lbs (10Kg), and check the deflection doesn't exceed 0.453 in (11.5mm). To engage partial (or full) TCC lockup, the fluid flow is reversed. Average repair cost is $3,620 at 21,150 miles. There is not check engine lights on. I thought about the transmission slipping a bit so I. 5) Clogged Fuel Injectors. 2. If the engine runs smoothly after this, the IAC is defective and must be replaced. Back out your idle screws 1/4 turn, that will stabilize the idle and help slow-speed metering. This is a sign that your truck's throttle body should be replaced. While not common, this issue can interfere with your engine function and cause your vehicle to lose power anywhere from once in a while to several times in a day. I have a 2007 Chevy silverado truck with 225000 miles on it . spot in acceleration, almost like the engine is not receiving enough. An alternative diagnostic for TCC shudder is to road test the vehicle and monitor commanded and actual TCC slip speeds. The new model of the Silverado 1500 heavy-duty pickup truck is a favorite among many individuals that are fond of driving 4WD vehicles. In areas where an idle emissions test is performed, failure is likely. Recently the car started "surging" 200-300 RPM at cold start up. Hello. You also have a camshaft position sensor on some car models, which the car uses if the . Have no idea what to do next. Fluid is pumped into the REAR of the converter, which pushes the TCC piston up against the front cover (and engages the TCC). 9) Faulty Camshaft Position Sensor. An engine or motor surge is caused by an imbalance in the computer system which cannot be corrected within the parameters of the vehicle's operating program, in other words there is a mechanical problem. "Surging" does not refer to a knocking engine or one that idles rough or stalls. The 2017 Chevrolet Silverado 1500 has 52 problems reported for surges and jerks. I have a 2002 Trailblazer LTZ. But, the engine seems to start fine and will normally accelerate fine. 2005 Chevrolet Impala 115,000 mi, Visitor. The check engine indicator illuminated. Drive axles may be loose or worn. To top I off sometimes at idle gets very rough and will drop to ~3-400 rpms and a low oil light stop engine message comes on. I have a 94 chevy 1500 5.7l throttle body fuel injection. I have a 1992 Chevrolet Z28 5.7 liter V8- The problem is what migration_judge_joy was saying is true but it also included the black cylinder that's balancing the air (oxygen) and gas at the same time. 2014-2019 GMC Sierra. I keep mine in 5th in city driving. Lean air-fuel ratio.