Suburban :: 1999 - RPMs Shoot Up To 2000 Then Back Down To 1500 While Driving
Oct 16, 2012
So the other day I was driving to my storage locker about 30 miles away. All of a sudden my rpms would shoot up to 2000 rpms then back down to 1500 . Slowly they would go up higher every time. On my way back I was about 2 miles away and I lost 3rd and 4th a presume. I would be going 20-25 and it felt like it would be shifting up to third but would shift down to 2nd running 3500 rpms. I had to go 20 the rest of the time. Finally I got home and realized my dipstick tube wasn't in the tranny and must have lost oil. So I got it back in and added more. Thought it was the filter and oil so dropped the pan and replaced it. Still nothing.
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Recently I have noticed that when on a tune other than stock I am getting a surge at idle - my RPMs drop to around 621-630 then shoot back up to 660-675. On my stock tune my RPMs stay around 640-667 and don't cause the surge (felt as a shimmy so to speak). Is there anything else that causes a similar symptom? I attribute it to tuning due to it only happening when running anything but stock but could be wrong.
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I have a 05 gli and when in idle the rpms go down really low then shoot back up. what could be the cause and how would i go about fixing this?
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I have a 1998 Toyota Camry , whenever I start it after its been sitting for 3 or more hours the rpm's shoot up to2,000 and stay there for 3-4 minutes straight, if I hit the gas they don't go down, if I turn my heat on they come down a little bit.
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I have a 2003 dodge grand caravan with about 111,000 miles on it. Overall it has been a reliable car. In the past month we had to replace the ECM because the computer died on the car. Now, very intermittently, while driving at about 60 mph the car will suddenly drop to 40 mph then shoot right back to where it was at 60. This only happens for about a second and then its fine.
Its quite startling but it has only happened to us 3 times in the past two weeks, so its very hard to replicate. There are no engine codes and it seems like the tachometer does not change during this sudden drop, although to be honest I wasn't paying that close attention to it when it happened.
Could it be related to the recent ECM replacement? The dealer "reprogrammed" the computer so I'm assuming all parts electrically have been checked.
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My wife has a 2000 t&c with 150k on it its a fwd with 3.8 and about a month ago while driving we noticed the rpms will jump up 400 and go back, with cruise control on or off being held at a consistent speed. and about for days ago it started shifting late. Still has all gears fluid looks o.k. and is full no check engine light .
I am hearing transmission solenoid, tps sensor, input sensor, output sensor, tcm, iac, map, or egr are all possibilities or a rebuild . Or simple as a flush.. tonight i went out n started it it idles around 800 tried to hold it at 1200 and it would for a second and drop back to 800 with accelerator being slightly held. Not sure if related. Just observed it..
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2003 F250. 6 speed. 5.4 2v. 4x4. 165,000 miles
When purchased, there was a vacuum leak and truck ran like crap and PO drove it that way for a while. I fixed the vacuum leak, discovered a miss between 1,500 and 2,000 rpms in every gear while accelerating. No miss at idle.
The truck has:
- no CEL
- new Motorcraft spark plugs that were not dropped, bumped, or over torqued.
- new fuel filter
- new air filter
- new alternator
*The miss usually does NOT happen in the morning on the way to work after sitting 14 hours.
*The miss almost always goes away after the truck gets up to operating temp.
*The miss ALWAYS is present after work on the way home after sitting 9 hours.
Fuel pressure?
Bad COP?
Fuel Injector?
Something totally different?
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I got a 2000 f250, 5.4l, I got a check engine light bout 2 weeks ago and didn't experience any driving issues. The code was p0171, just recently I've been experience troubles idling, if I let my truck idle for about 3 minutes it will want to shut off, also on acceleration the hole truck bumps, feels like I'm in an earthquake. Where I should start with this problem?
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I have a 00 Suburban 1500 4wd and when I move the steering wheel the tires do not turn. I looked and a nut is missing from one of the pieces! Not sure what it is called!
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I just recently got handed a 2005 ford f250 6.0 PSD from my older brother, new to the whole diesel game, well all of a sudden as i was driving down the road about 65 mph, trucks RPMS shoot to about 4K and tow haul light starts blinking as i start pulling over (still in drive of course) i realize i can't move anymore the trucks rpm just rev. In all gears it does not move i moved 1-3 D and R and nothing truck just revs. i had my father get under the truck as i shift from gear to gear and the linkage is moving back and forth on the transmission as i put it in reverse the reverse lights still pop on, I'm new to the diesel game...
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I have a 2003 lexus gx and every time I am driving around 1,500 rpms it has a vibration and it feels like its coming from the transmission.
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I was climbing up a hill on the highway, and I was aware of my issue by the time I hit the top of the hill - my car far into the red zone on the temp gauge.
I pulled over just after i got off, let it cool for a few minutes, check oil and coolant and they seemed fine (from what i could, but it was dark. Drove home because it was only a few mins away, and it had cooled a bit already, but it started sounding really weird at low rpms (1200-1500) almost a clanging noise.
Just as i was pulling into my driveway, there were a whole bunch of weird noises, and at least one of them was me losing coolant from the cap. Turned off the car and the coolant overflow box was completely full, and the radiator cap had leaked some too.
Some other things i noticed - sounded like boiling water inside the large hoses, hoses felt empty, and the coolant box emptied all of a sudden after the hoses sucks everything back up.
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My toyota will not idle. The last time this happened, it needed a new battery. The idle is controlled by the battery. The alternator doesn't kick in untill 1500 to 2000 rpms. The battery checks out OK this time. It's an 03 4cyl.
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My diesel suburban dies while driving. It starts right back up. I have changed the fuel filter and checked for water in fuel.
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We got our first taste of fall weather in Houston this weekend, and with it I've discovered a new problem with my truck. After the engine was up to temp, I noticed that the heater would blow cold air any time I sat at idle. If you rev up the rpm's to 1500-2000, you can feel the air start to get warm again. I'm guessing this means my heater core needs to be backflushed.
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Last week I took my baby to AWE Tuning, and had a chip and a diverter valve installed, when i left it felt like a different car it was great! now when im driving its not right, ok ill be in gear and as soon as i get on it and hit like 3thousand rpm it feels like the clutch is engaged and the rpms shoot up fast and the car isnt moving like it should. is it my clutch?
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I have a 2006 Hyundai Sonata that in winter does very strange things, almost ghostly. While driving, headlights flicker on and off, the dash abs and esc warning lights go on, and rpm's shoot up and stay there as if it downshifted by itself. I have to pull off the road and turn the car off.
Further, three different times I shut the car off and then nothing would work, including not being able to start the car. After it sits a while it then seems to reprogram itself and works properly.
I contacted Hyundai, and they only said bring it in and pay to diagnose it. But there appears to be no fix, as many have reported electrical problems for this model on the internet.
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I have a 3.3L 2007 Sonata. Within the past month, after first turning it on in the morning, the RPMs shoot up to about 1400 and slowly come down to normal after about 5 minutes. It does this in park and neutral, when I put it into drive it goes down to normal. If I drive it for a mile and put it back into park and neutral, it idles at a normal RPM. If I turn the car off for ten minutes and start it up again, it idles normal at about ~850 RPMs.
After doing a bit of google research, a lot of sites say that this is a normal thing for a cold engine to do. However, the RPMs have never gone that high previously. The check engine light hasn't come on.
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2010 Mazda Speed 3 ....My car has about 62,000 miles on it and has recently been having acceleration issues. 1-3rd gear seem under powered and what I am giving on the gas does not equal the power that should be coming forth, the RPMs seem to shoot up really high with no power transfer. When i am in 3-5th gear my acceleration is again funky with the slightest touch on the gas again causing the RPMs to jump high with no return of power to actually accelerate. I recently replaced the battery and changed the oil??
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When I start my 2003 Escape 3.0, the rpm's shoot up to about 3000rpms. After a few seconds they drop to about 2000 and slowly creep back up to 3000. When I put in gear, I don't even have to step on the gas and my vehicle goes. It maintains between 1500-2000rpms as I'm driving. When I come to a red light or stop sign, it lurches like it wants to go even though I have my foot on the brakes. I've replaced the IAC valve, TPS, had it checked for vacuum leaks, PCV valve replaced. I'm at a loss as to what it could be.
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I have noticed a louder noise and increase in vibration during driving at speeds of 70mpg + ... What is the cause??
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