Just recently I noticed when I slow down in 2nd, 3rd,4th, or 5th gear inbetween 1k-2k rpm that my engine studders (as in shakes back and forth) until I get past 2k rpm, or if I mash the gas pedal between those rpm I noticed my engined goes really slow until it gets past about 2100k rpm and it launches fast (feels like a mini turbo). It never did this before and is getting on my nerves because I have to go over a lot of speed bumps when I go to class and I dont want to go to first gear everytime I am driving around 15mph. So if you have any idea's why this is happening please post. (also it started around when I put some 91 octane gas in my car by mistake, I dont think this matters since I used all that gas and refilled it with 87 and its still doing it.)
Engine studders... - 6G Celicas Forums
Try resetting the ECU by disconecting the battery for 5 mins.
This could be injectors need cleaning, a bad oxygen sensor, bad spark plugs.
This could be injectors need cleaning, a bad oxygen sensor, bad spark plugs.
--west_minist+Jan 28, 2003 - 6:29 PM
...even bad gas; happened to my moms car...rough idle, funny acting--next tank...smooth.
Dont go to econo gas stations.
| QUOTE (west_minist @ Jan 28, 2003 - 6:29 PM) |
| Try resetting the ECU by disconecting the battery for 5 mins. This could be injectors need cleaning, a bad oxygen sensor, bad spark plugs. |
...even bad gas; happened to my moms car...rough idle, funny acting--next tank...smooth.
Dont go to econo gas stations.
--west_minist+Jan 28, 2003 - 6:29 PM
Ill try resetting it, but I doubt I need my injectors cleaned (had that done a few months ago) and also got new spark plugs a few months ago.
| QUOTE (west_minist @ Jan 28, 2003 - 6:29 PM) |
| Try resetting the ECU by disconecting the battery for 5 mins. This could be injectors need cleaning, a bad oxygen sensor, bad spark plugs. |
Ill try resetting it, but I doubt I need my injectors cleaned (had that done a few months ago) and also got new spark plugs a few months ago.
--remjay+Jan 28, 2003 - 6:33 PM
Yeah I thought it was the gas too but I went through a tank of 91 octane at chevron, then after that I went back to 87 octane with exxon which both are two pretty good gasoline places (I get 90% of my gas from exxon) and I do avoid the "econo gas stations", but still it jerks.
| QUOTE (remjay @ Jan 28, 2003 - 6:33 PM) | ||
--west_minist+Jan 28, 2003 - 6:29 PM
...even bad gas; happened to my moms car...rough idle, funny acting--next tank...smooth. Dont go to econo gas stations. |
Yeah I thought it was the gas too but I went through a tank of 91 octane at chevron, then after that I went back to 87 octane with exxon which both are two pretty good gasoline places (I get 90% of my gas from exxon) and I do avoid the "econo gas stations", but still it jerks.
do you have an auto or manual? run some fuel injector cleaner next time you fill up.
1994 Lexus ES3001989 Supra Turbo1990 RHD ST185RC - JDM Spec
manuel, I guess ill try some of the ideas tomorrow, will let you know if it works.
Try to come in Italy to make fuel.....we've only 95 or 98 octane fuel!! >
> >> >> >> >> >> >> >> >> >> >>
> >> >> >> >> >> >> >> >> >> >>
--Benevolence+Jan 28, 2003 - 7:01 PM
Ok, just tossing the idea into the air. What I meant was this new tank of 87 could be the bad gas.
Also, as a sidenote, try not to let your engine go into the lower 1-2k rpm range when in 4th and 5th gears. Its lugging the engine and could lead to ping/predetonation.
If you get a chance, find a safe road and let the car rev. Stay in gear [try 2,3, and depending on space 4] till a little under redline. Do this for at least 5-10 min continous. This helps free any carbon buildup that could be causing some problems.
| QUOTE (Benevolence @ Jan 28, 2003 - 7:01 PM) | ||||
--remjay+Jan 28, 2003 - 6:33 PM
Yeah I thought it was the gas too but I went through a tank of 91 octane at chevron, then after that I went back to 87 octane with exxon which both are two pretty good gasoline places (I get 90% of my gas from exxon) and I do avoid the "econo gas stations", but still it jerks. |
Ok, just tossing the idea into the air. What I meant was this new tank of 87 could be the bad gas.
Also, as a sidenote, try not to let your engine go into the lower 1-2k rpm range when in 4th and 5th gears. Its lugging the engine and could lead to ping/predetonation.
If you get a chance, find a safe road and let the car rev. Stay in gear [try 2,3, and depending on space 4] till a little under redline. Do this for at least 5-10 min continous. This helps free any carbon buildup that could be causing some problems.
I just wanted to add one more thing... I just got a new clutch installed less than a month ago... could there be something involving that?
Same thing happened to my old Paseo.
Try higher octane rating.
I think it's a sign of detonation. If big detonation occurs (especially at lower revs) it can cause the piston to rock, which can make the engine shudders a little bit.
Could be exagerated by bad engine mounts too.
Try higher octane rating.
I think it's a sign of detonation. If big detonation occurs (especially at lower revs) it can cause the piston to rock, which can make the engine shudders a little bit.
Could be exagerated by bad engine mounts too.
Take your car to a shop and have them do a fuel injection tune up. . It cleans all the carbon and other crap out of the system from the throttle body to the exhaust port. Most qualified shops have this service, it does cost a bit, but it is worth the money.