 Engine studders..., any suggestions? |
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 Jan 28, 2003 - 8:02 PM
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 Enthusiast  Joined Oct 9, '02 From San Diego, CA Currently Offline Reputation: 0 (0%)  |
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.)
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Jan 28, 2003 - 8:29 PM
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 Enthusiast Joined Oct 27, '02 From Barbados Currently Offline Reputation: 0 (0%) |
Try resetting the ECU by disconecting the battery for 5 mins.
This could be injectors need cleaning, a bad oxygen sensor, bad spark plugs. |
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Jan 28, 2003 - 8:33 PM
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Enthusiast Joined Nov 13, '02 Currently Offline Reputation: 0 (0%) |
...even bad gas; happened to my moms car...rough idle, funny acting--next tank...smooth. Dont go to econo gas stations. |
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Jan 28, 2003 - 8:58 PM
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Enthusiast Joined Oct 9, '02 From San Diego, CA Currently Offline Reputation: 0 (0%) |
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. |
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Jan 28, 2003 - 9:01 PM
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Enthusiast Joined Oct 9, '02 From San Diego, CA Currently Offline Reputation: 0 (0%) |
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. |
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Jan 28, 2003 - 10:32 PM
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Enthusiast Joined Oct 1, '02 From North Bethesda, MD Currently Offline Reputation: 0 (0%) |
do you have an auto or manual? run some fuel injector cleaner next time you fill up.
-------------------- 1994 Lexus ES300
1989 Supra Turbo 1990 RHD ST185RC - JDM Spec |
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Jan 29, 2003 - 2:23 AM
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Enthusiast Joined Oct 9, '02 From San Diego, CA Currently Offline Reputation: 0 (0%) |
manuel, I guess ill try some of the ideas tomorrow, will let you know if it works.
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Jan 29, 2003 - 4:54 AM
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 Enthusiast Joined Dec 21, '02 From Italy Currently Offline Reputation: 0 (0%) |
Try to come in Italy to make fuel.....we've only 95 or 98 octane fuel!!
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Jan 29, 2003 - 5:41 PM
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Enthusiast Joined Nov 13, '02 Currently Offline Reputation: 0 (0%) |
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. |
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Jan 31, 2003 - 2:54 AM
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Enthusiast Joined Oct 9, '02 From San Diego, CA Currently Offline Reputation: 0 (0%) |
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?
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Jan 31, 2003 - 4:37 AM
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Enthusiast Joined Jan 12, '03 From New Zealand Currently Offline Reputation: 0 (0%) |
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. |
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Feb 4, 2003 - 1:31 AM
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 Enthusiast Joined Jan 20, '03 From Denver, co Currently Offline Reputation: 0 (0%) |
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.
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