Support American Manufacturing and Workers: 50-100 rpm fluctuation - Hey guys, my 2010 5.3 AFM Silverado w/66,000miles has been RPM surging while driving over the past couple weeks. Question: I have a 1999 Chevrolet Silverado S10 and, lately, the engine has been surging while at an idle. Had it replaced and so far so good. Also, confirm that the problem is not with the catalytic converter. In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. Code indicated crank positioning sensor. 04-26-2012, 07:49 PM. I'm having a bit of a problem and I am hoping someone could point me in the right direction. Up then down, up then down. The 2017 Chevrolet Silverado 1500 has 42 problems reported for surges and jerks. 1992 Chevy K1500 5.7: while driving truck it started bucking, rpms rapidly going up and down. Hello all, I have an 01 CTD with approx 167K that has a strange problem. First, let's pinpoint exactly what's going on. 1991 Chevy 1500 4.3L TBIThe truck starts fine but looses power while driving up an incline within the first 10 minutes of driving. The truck starts and sounds fine at idle fine. 1991 gmc 5.7 surging while driving Sierra Car Forums Automotive ... 1991 gmc 5.7 surging while driving. While driving (usually on highway), and I shift up in I believe third gear, the rpms surge between 2500 to 2700/2800 rpms (like it bounces, and the car gradually increases in speed). 2 weeks ago it quit at 30 mph, wouldn't restart and SES lit up. https://my.chevrolet.com/web/portal/managemybrand?g=1, https://my.gmc.com/web/portal/managemybrand?g=1, http://www.gm-trucks.com/forums/topic/1 ... ight-load/, 09 Silverado 1500 Surging rpms and random engine power reduc, Herky Jerky Type Surging During Acceleration. Apparently on the newer trucks the engineers re-designed (un-desinged?) Truck would die at idle, city driving or at 80 mph. Rmurdock, you should check (just for funnies) if anyone is having that issue in the EcoTec 5.3L V8 section. The truck DOES NOT REV much higher in 5th than 6th. by alkaspeltzar [OP] » Jul 16 2013, 4:21am, by alkaspeltzar [OP] » Jul 16 2013, 8:54pm, by GM Customer Service » Jul 17 2013, 5:07pm, by alkaspeltzar [OP] » Oct 02 2014, 3:08pm, by GM Customer Service » Oct 02 2014, 8:12pm, engine same make thanks still think surging driving rpms back help silverado, Users browsing this forum: Stranger and 40 guests. The converter never really locks up like you would think. While the REP light was on, I wasn’t able to pull any codes because I was just trying to get the truck home. Average failure mileage is 59,600 miles. The 2002 Chevrolet Cavalier has 4 problems reported for engine surges while driving. Does anyone have any ideas? Your engine is a little different from the 2010. Remove the vacuum line to the valve and see if the engine runs smooth. It seems to happen primarily when traveling between 45-55mph. Many states require checks every year or two, but if the truck is new or over four years old, this unit may be the cause of this problem. alkaspeltzar are you still having this issue or was it fixed? I am pretty picky. In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. Average repair cost is $3,000 at 12,250 miles. I'm stuck and don't know who to believe. I just bought a 05 Canyon crew cab 3.5 with 204k miles and while driving back from where I bought it I noticed a quirk. The problem is surging and drop-off in RPM while driving. While driving it, the engine surges as if I'm spiking the gas pedal, especially when I'm slowing down to a stop. I have a brand new 2014 with less than a Thousand miles and its doing the exact same thing. Customer complaint bad gas mileage and a surging condition at idle, sometimes. When driving either on a flat road or uphill typically, my 1996 K1500 V8 305CI surges a bit. Hey guys, my 2010 5.3 AFM Silverado w/66,000miles has been RPM surging while driving over the past couple weeks. Once you begin to push the accelerator pedal, it is very jumpy (over responsive) when the accelerator is depressed. If I try to push on gas it eventually would backfire and smelled rich. SOURCE: 2002 Chevy Trailblazer surges on the highway. the 4L60E so that it has incredibly lame shifts. I have also questioned the dealer, taken a couple other trucks for a drive and they have acted the same. The RPM's will jump up and down 200-300 rpm's only while driving, sitting idle it seems smooth. The Chevrolet intermittent electrical problem got so bad the problem finally occurred in front of me. Any help would be great. From buying research to owner support, join 1.5 MILLION GM Truck Enthusiasts every month who use GM-Trucks.com as a daily part of their ownership experience. We have a 1988 GMC Sierra 2500 with a 5.7/350 and auto Tranny. It will jump from about 1500 RPMs to 1700 RPMs. When driving, slightly accerating, the truck is doing about 1100 rpm in its 6th gear. 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. Applying the brake makes it go away. Never threw a service engine light or a code and would readily re start. When I get my truck up to about forty mph and am cruising along, the motor starts to surge. I'm new to the forum though I have looked at some other threads. Hello! First off, 3,000 miles is way too early to start measuring mpg. The check engine light is also on. roonie. Vacuum leaks can cause surging on some engines, but it depends on the type of fuel injection system. It doesnt sound like a torque converter problem. ... My 02 trailblazer jumps in rpm's while driving, typically when i am in crusie control over 55 mph. If you keep the accelerator steady, and apply the brake while you still have the accelerator steady, the surging immediately goes away. Since purchase of vehicle, it had a bucking at speed of 25-40 mph, this was very noticeable in city driving, this issue was couple with uncontrolled surges in the engine. I keep mine in 5th in city driving. It also surges and slows down on its own with the pedal in a fixed position. I've had one guy tell me it's the Torque Converter Clutch Lockup Solenoid and another mechanic tell me that is definitely not it. And half the time when it does this, the truck will kinda shake like I'm driving on a rough road. this truck has 180km on it and runs fine exept as of lately i have developed a surge while at constant speed. It turned out to be my O2 sensor. Hello everyone, this is my first post here and I needs some help. My issue: my son has a 1989 chevy Silverado; 350, auto trans. I had a similar problem on my 95 1500. But even locked, the PWM will let the converter clutch slip a bit under conditions just like you describe. (Page 1 of 3) Thank God for this truck. I could floor it and no problem but trying to keep a steady speed the truck would serge. The surging stops if I let up off the gas pedal right away while driving. When at hyway speed it seems to not do this. Mine did the same thing. We're not talking about a knocking engine or one that idles rough or stalls.We're talking about engines that start easily and accelerate smoothly, but then, after a few minutes at a steady speed, either surge in speed or misfire, causing the car to "buck." All of this happens after I’ve been driving and not at the initial start up. It starts and dies first thing in the morning. Replaced wires, plugs, distributor cap/rotor, tps, ignition module, map, IAC, engine coolant temp sensor, rebuilt fuel pressure regulator and new alternator. My '06 would do that when the torque converter locked up. Check the IAC and see if it’s working. When I checked the ground cable for tightness at the battery I saw looseness at the actual crimp fitting that holds the negative cable in place. When driving either on a flat road or uphill typically, my 1996 K1500 V8 305CI surges a bit. Applying the brake makes it go away - When driving either on a flat road or uphill typically, my 1996 K1500 V8 305CI surges a ... SilveradoSierra.com - Chevy Truck Forum | Silverado Sierra GMC Truck Forums The only site focused on Silverado/Sierra trucks exclusively. If the engine runs … For the engine surging making the rpm’s go up and down could be caused by a defective or stuck idle air control valve (IAC). I turned in the vehicle for service on Dec 19, 2016, dealer service rep confirm there was an issue and keep the truck for repairs. while driving keep surges truck problem sound road trying speed brake tell check thanks still anyone another dealer, Users browsing this forum: No registered users and 9 guests, Surge typical while driving uphill. I am not going to lie, I would have thought the PWM would be smoother and the fact that I am noticing it now seems odd. Sometimes does it between 2000-2100 rpms. That's what the dealer said. When I got my truck the first 5,000 miles the city mpg was really bad, and then got better. Chevy Truck Forum | Silverado Sierra GMC Truck Forums. I notice mostly while driving on the freeway. Acceleration Surge While Driving or with Starting: Pull over to … Truck surges while driving. I've recently changed the Pmd with a new vetilated fsd and relocated it with a fan on it. After 2 or 3 times of that it will start surging until it reaches operating temp. A surge is usually caused by a fuel system management or drivetrain operation failure. For a long time now we have been having a problem with it surging when you start it, and when the … RMURDOCK, I think what you are experiencing is completely normal. The engines RPMs seem to bounce back and forth 50-100 rpm. The vehicle was purchase oct 28 or 30, 2016. The car has started surging or loping, while driving , and does it constantly, and has progressed over the past month. I have a 2014, did the same bobble.....Please see the post below, as I and others have seen similar things around 40-50mph when the TCC seems to partially release to increase torque as 6th is alttle deep for gear. My 98 Chevy Silverado surges when driving until about 1700 RPM then it runs great.Even runs great when accelerating. Engine Misfire While Moving . It does this every time when going up a hill, and usually when not,and it is always the same amount that it surges by. Throttle Position Sensors have been known to cause symptoms like this if they are out of adjustment or defective. I have changed out the speed sensor, the throttle positioning sensor, fuel filter, mass air flow sensor, ran injector cleaner through it. when accelerating or a constant speed it continues to do this. NO reason to have the truck shift to V4 for a very short distance. The truck will do this a couple of times, then will drives fine for the rest of the day. Surge typical while driving uphill. But also trying to maintain constant speeds. My 2005 Chevy Trailblazer that surges while maintaining a speed between 40 – 60 mph. Hey guys, my 2010 5.3 AFM Silverado w/66,000miles has been RPM surging while driving over the past couple weeks. While I'm driving, the engine will loop or surge (whichever you prefer) about 100 RPMs every 2-3 seconds. It idles up/down, surges, and starts sounding like it’s missing, just before shutting down. From buying research to owner support, join 1.5 MILLION GM Truck Enthusiasts every month who use GM-Trucks.com as a daily part of their ownership experience. Here's the specifics: - It only seems to do it between 30-50 mph - It only does it while I am trying to hold a constant speed (not accelerating / decelerating - The tachometer shows the engine surging up about 1-200 rpm Truck surges while driving. A technician with a highend scan tool should take it for a road test to diagnose the condition. Sounds like the torque converter is coming out of lockup. Cleaned throttle body...now engine surges, 4.3 Vortec died while driving, will not restart. 07-24-10 09:50 AM - Post# 1950120 Hi everyone! Put a scan tool (not a code reader) on it and check all the sensors. I got a 1997 7.3 while apllying light pressure on throttle ad while driving a steady throttle truck acts as if im hitting the pedal hard then letting off repetively. The motor surges on and off while I am driving. I did a full tune up, I replaced the O2 sensors, fuel filter and fuel pump and it still surges. then sometimes it will suddenly just shut off as if I turned the key off. There's something called Pulse Wave Modulation (PWM) used to make the converter lock-up almost undetectable. By continuing to use this site you consent to the use of cookies on your device as described in our … 6 Answers. Nov 14 2011, 4:44pm. It seems to happen primarily when traveling ... SilveradoSierra.com - Chevy Truck Forum | Silverado Sierra GMC Truck Forums The only site focused on Silverado/Sierra trucks exclusively. It only does it when initially driven that day. 2006 Chevy Impala 3.5L. 1995 chevy k3500 454 engine truck surges while driving - Answered by a verified Chevy Mechanic We use cookies to give you the best possible experience on our website. If yours behaves as mine did it could be a while before you get a traceable code. 3. My 1995 Chevrolet Silverado truck had a hesitation problem, which we were able to fix by replacing some parts. Taking it into the dealer tomorrow, but was interesting in you experience. When an engine's computer can "hunt" or "surge" at cruising or idle speeds it is searching for program compliance, there is a problem elsewhere in the system. My friend has a 1996 6.5 turbo diesel I'm trying to help him fix. P0068 and P0016 came up. at a steady throttle driving down road it also does it truck sitting at an idle is fine. I am new here and really need some help.
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