Celica :: Light Throttle Shudder And Rough Idle
Jun 9, 2013
I have a 1991 Celica GT. 175K miles. The car recently developed an issue where it jerks back and forth at light throttle, sort of like a newbie trying to learn to drive a stick. It happens at pretty much any speed, but is less pronounced at the higher speeds (45 MPH). In addition, it will not idle at a constant speed and cycles between 1100 rpm and about 300... or kill.
I've taken the throttle body off and IAC valve off and cleaned them both but it didn't change the behavior. If I pinch the line to the MAP sensor, the idle straightens out at about 1100 rpm. Disconnecting the MAP sensor gives good idle, but no performance while driving, so not a solution.
Things I haven't done yet: check continuity on throttle position sensor, checked MAP sensor (how?).
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I recently bought a 1992 Celica GT with 250k miles on it. It has a rough idle and a couple other things that may or may not be stemming from the same thing that's causing the rough idle
Like I said, it has a rough idle and there is a bit of jerking sometimes during acceleration. The exhaust makes sort of a "put-put-put" or "chirping" sound at lower RPMs and the frequency of the sound corresponds to the engine RPM. I do know of a couple things that could be causing the rough idle and maybe even the jerking, but I'm not sure about the sound from the exhaust.
The cooling fans are hard wired to the ignition so they run constantly, so when it's cold out like it is right now it takes forever for the engine to warm up. Is there a switch somewhere that they are supposed to be wired through? Where would that be? Also, the previous owner did kind of a hack job of putting on a cold air intake and I think I may be missing some sensors, especially because it seems to burn more fuel than it should. What sensors are located on the air intake, or are there even some in the stock airbox itself? And would this possibly be contributing to the rough idle and the jerking?
Also, I do get some vibrations when stopped at idle so I think I may want to replace the motor mounts.
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I just bought a 92 Toyota Celica for something to play around with. It's got just over 200,000 miles and everything seems to run alright except there is a really rough vibration at idle. The vibration is so bad that it's almost visible. You can still feel the vibration in drive but it isn't nearly as bad.
Any clue at what could be causing the vibration? I'll try to get a sound clip or video uploaded ....
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2001 f250 v10 6.8l runs a little rough at idle, low rpm is ok between 1700 and 3000 rpm but around 3 it starts to shudder while driving let off gas get back on its fine, new plugs 1,000 miles ago has throttle body spacer and cold air intake, stock everything else..
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I have a 1986 Celica GT-S with 50,000 original miles on it. Car starts perfectly fine in the morning, runs fine, no issues. Problem happens when the engine is warm, and I let it cool off for about 10 minutes or so, at that point, when I try and turn the engine over, it would sometimes turn over and idle very rough, or sometimes it would die and I have to give it gas to keep the engine running. Once I am able to get it in gear and drive, the engine rpm would recover and go back to normal. I have new NGK wires, denso iridium spark plugs.
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The car: 1994 toyota celica GT 2.2L automatic
Here's the problem: car starts fine when cold. When fully warmed up, if i stop to go to the store or something, and then start it after like 20 - 30 minutes it will start and the idle will be fluctuating between 800 and 400 for a few minutes and then even out. sometimes it will actually start up and die immediately, in which case i can save it by giving it gas for a few seconds and then it's fine.
What I've done so far: plugs (NGK), wires, cap, rotor, fuel filter (toyota), (checked air filter. still clean), tried cleaning the throttle body and IAC with some deep creep spray while on the car (not much effect).
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I have a 100% stock 2004 Celica GT ~125,000 miles. Over the last few months I have been getting a rough idle and stumble at low rpms. The other day the car would not restart after sitting for about 20 minutes. Only recently has it actually thrown a DTC. The error codes were for misfires (P0300, P0301,P0302,P0303, P0304). I don’t get a code every time but the problem seems to be more noticeable if the car has been ran for a while, sits for 20-30 minutes while in a store and then when I try to start it when I come out of the store is when the problem most often occurs. When it restarts it will stumble at low RPM and if I hit the gas it has little response and misses badly. I have never used a scanner until now. I am using a Autel MS509 scanner and I am not sure it is giving me the correct diagnostic numbers for the live data. I think the DTC are correct but the live data is questionable.
Here is what I have done so far.
- Cleaned IAC valve (completely removed and cleaned)
- Searched for vacuum leaks using carb cleaner
- Cleaned MAF sensor
- Replaced all 4 injectors
- Replaced upstream and downstream O2 sensors
- Replaced Coolant Temp Sensor
- Ensured cam tensioner is providing adequate pressure to the cam chain
- Tried 2 sets of new Iridium NGK plugs and a new set of Bosch Copper plugs
- Moved coil packs around
- New air filter
- New fuel filter
- SeaFoam through intake and gas tank. I have not mixed in the oil.
- Compression Test (1=190,2=190,3=160,4=178)
Things I have not done.
- Taken it to the stealership
- Fuel pressure test
- Valve Clearance
I am concerned about the compression test because according to the service manual it should be around 218. I was using a Harbor Freight compression tester and I am not 100% sure I had a good seal with the tester.
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I have a 2001 Toyota celica GT auto. It has 120k miles. I seem to have an issue that really is not causing a problem except for annoyance. After coming to a stop the car seems to exhibit the signs of stalling (car idles rough, shakes a bit) however the car never stalls. Once I start driving all is well. Now I took it to the dealer and they replaced the Idle Air Control Valve which is under the throttle body. They said it was getting stuck and due to the higher mileage possible. It was replaced and the problem is still there. The funny thing is even though the car exhibits these stalling symptoms the idle does not drop below 500 rpm (both dealer and I have verified this).
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I finally finished installing my VF stage 2 supercharger. I fired it up and the idle is low (around 500 rpms) and a very rough idle. Throttle response is very slow, when it finally revs the car stalls. I can also hear a leak somewhere near the throttle body. I have an SAI block off plate. 630cc injectors and UM tune. No CEL
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Having problems with a ECM and throttle body for 2010 Corolla S? My corolla will idle rough and the throttle body will shut the car down to where it is inoperable. It throws codes and shuts the VVT down. The car currently has 56k miles on it and has been to Toyota 3 times in 3 months.
The first time they say they replaced the ECM, I really don't think so. 24 hours after we picked the car up it shut down again. The second time we brought it back in they said the brake light bulb caused the throttle body to shut down.
It had to go back again this week after it shut down again in traffic when it was idling. Toyota said the throttle body had to re-learn the idle again from when the ECM was supposedly replaced.
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Few weeks ago.....Prius was showing the P0505 code .... Mechanic, ran diagnostics and determined it was dirty TB. Cleaned TB.....cleared the code (inspected PCV...hoses).
When I initially picked it up it was revving very high....so he hooked it back up to the scanner and did some type of "reset" for the idle (this cleared most some computer settings...back-up beep, radio stations, etc...). Everything ran fine for past 3 weeks...
Just last night..... started running rough again. What I noticed this morning ... Started it up and it ran very rough til the auto shutdown after warmup (no warning lights). Then....when I started driving slowly out of the lot...it ran "rough upon acceleration"...... Then fine at cruising speed. Same behavior at every light....rough acceleration.... fine once up to speed. Just started it up again and same behavior.....(does not die...just very rough).
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I have searched a decent amount on this and it seems like there is a whole list of items that could cause these problems. The car is a 2008 Passat 2.0T with the tiptronic. It is the early 2008 so it still has the FSI motor. It only has 53k on it and literally just came out of warranty a month or two before this all started happening.
It all started with the CEL coming on and the went into limp mode. We shut it off and turned it back on, the car went into limp mode again but upon the 3rd restart the car started and ran just fine. Then for a few weeks we just had a CEL (I don't know what code it was because I never scanned it at the time). Now as of lately the car is have a terrible rough idle, and at stops it will start kinda shaking and lurching forward. Sometimes it will also have a noticeable misfire upon start up. Also after going at highway speeds for some time the car will start to produce a squealing noise when not producing boost.
A few days ago I scanned it and these codes came back:
P0110
P0101
P0102
P0104
P0108
P0171
The first 5 IIRC are related to misfires and the P0171 is a lean code.
At first I thought this was the PCV valve because I had read about the lurching and the squeal that someone else had from that but after reading up more on things I am worried the P0171 is from the cam follower.
At this point I am just very tired of hearing my wife constantly complaining about the car. I want to try and figure this out without throwing part after part at it. I can't afford to buy items just to find out they aren't fixing it.
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I recently bought a 2006 that idles rough, not real bad, but bad enough for me (and my 9 year old kid!) to notice. I asked the dealer where I bought it and they put it on the computer and said everything checked out. He said "it's a characteristic of this motor." I've never heard of such a thing. The truck has 27,000 miles on it and the dealer flushed the fuel system. He said the throttle plate had a lot of carbon on it, but it still idles rough... 4.6 idle rough?
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Trying to clean the throttle body on my 09 sonata 2.4L due to rough idle occasionally (throwing P0106, replaced MAF sensor still same problem), one quick question, is it okay to force the valve open (with connector disconnected of course), and is "re-learning" necessary and what's the proper way to do it?
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2008 Accent. 230,000 km's. Most regular maintenance done (belts, oil changes, filters etc). Had to replace a few coil packs in the past like everybody else with this car.
Current problem: Car was working well. It then sat for 3 days (it was cold). Now when I am in park or in drive but idle (worse) the engine will shudder at random intervals. I don't notice/hear anything when driving more than 20kmh. For the first 2 days of driving it was pretty bad while idling. The engine light went on and then turned off later in the day (before I read the code and have since reset the computer so can't read it). It would do what I'm assuming is a misfire every few seconds. It's a bit better after a few more days but still is misfiring. During the 'chug' or 'shudder' the RPM drops ever so slightly, and the headlights and dash lights dim slightly as well. When I am driving and first come to idle, it's not too bad. Maybe 1 'chug' in 10 seconds. As I idle longer is gets more frequent. No more engine light after that first day.
I unplugging each coil pack and each one when unplugged made things way worse. I assume it's not those again. Battery was tested. It's older and should get replaced this year but it was still reading strong. Alternator was tested and is fine. I unplugged the battery to reset the computer but that hasn't worked.
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I searched but couldn't immediately find anything about this particular line. I've been struggling with a rough idle for the past couple weeks, throwing codes that I'm running to lean all the time. I cleaned the throttle body and MAF, and was in the process of replacing the MAF and noticed a small hose fitting behind the MAF but before the throttle body was pretty much split in half. I don't know what it's for and I'm replacing it regardless, but could this be the source of my problem?
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I just locked out the cam phasers on a 2005 f150 with a 5.4. It now idles pretty rough. If I blip the throttle the revs will rise and then drop again, and it barely catches in time to prevent a stall. If I continue to tease it this way I can usually get it to stall. I'm getting no CELs or anything, but I intermittently will get a P035x code (it seemed to rove. I've gotten cylinder 1, 4, 6, but not consistently.). I have chased those around by swapping coils, checking/cleaning the connectors, etc.
I am kind of thinking that these codes are a symptom of my idle issues, and not the actual problem. What could I have done wrong? Could it be a vac issue? I had basically the entire ECU harness and all the vac lines disconnected to do the job, but as far as I can tell everything has been reconnected to the correct locations. I did have an SCT tune done to remove the phasers in the ECU. I installed it and still have the issue, so for now I am on the stock tune just to eliminate any variables.
Could my tune be the issue? Is this how you would expect the engine to behave with locked out phasers and no corresponding ECU tune?
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We got a 1990 celica gt with the 5sfe in it. first night driving it after about 30 minutes the oil light would flicker at idle. We checked the oil, it was nasty so we did a complete oil change. Didn't fix the issue. Well then we developed an oil leak at the oil pump seal so we replaced all those. We had heard the sending units were notorious for going bad so we took it out and put an aftermarket gage in it. Still an issue.
Ok so then we checked the main bearings to make sure they were ok, they are fine. Normal wear. No clogged oil screen either. We then was told to try a little bit thicker oil so we did that. Still the issue. Here's what happens. start it up cold at idle is about 50-60psi. Let it warm completely up and it drops to 18-20psi. When you rev it up it rises.
Ok well after driving it for about 30 minutes after warm when I came to a stop it dropped to 0! Rev it up and it rises a lot. Held it at 2k rpms and it stays at about 30-35 psi. Ok as I'm driving it, it has good oil pressure. Motor is not making any noises other than the common Toyota valve chatter.
We have ran cleaner thru the engine thinking so gunked up ports and still no change. We are at a loss. Like I said cold it's fine, revving it up after being hot is fine. Driving it is fine. but boy when the engine is hot n u come to a stop or at idle it's nothing.
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My brother was the original owner then passed it on to me. I then passed it on to my younger cousin about two years ago. The car is completely stock and has never been modified. Everything is OEM.Just a couple of weeks ago I was called by my cousin saying the car broke down on her .The problem is that we took it to a few mechanic shops but they still haven't fixed it ...
Problem with car: When pressing on the gas, the idle drops and then the car dies (a scary event that happened to us and on a main road). I do not wish to bring it to another fail mechanic shop.What the shops did: changed all fluids, distributor cap and plugs, new spark plugs, and replaced air intake piping with oem piping.
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I have a 90 celica gts. when it drove, it would violently shudder taking off in first gear. the front motor mount was shot so i was hoping that was the problem. well right after i fixed it, the starter went so i had to compression start it, and the shuddering was still there, and i was about to shift to second when it revved up popped outta gear and didn't go anywhere. it wouldn't go into any gear.
I can go through all the gears without the clutch in. the guy i got the car from said the clutch was new. now i'm not sure if hes just lying or if the guy who put it in didn't know what he was doing. could this be a bad throughout bearing? or the trans? if its the trans i'm scrapping it, also the shiftier is REALLY loose. and before the clutch went it would make weird whirring noises in 1st.
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I've just done an engine swap to my 2000 GTS Celica. The new engine seems to run nice and tight and smooth and everything but I can't seem to bring the idle down. It stays revving at about 2000 RPM and the check engine light is on. The engine is from Japan and only has 35,000 kms. on it.
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