2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

my car jerks when i get into gears realy bad and cannot accelerate above 2000 rpm

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Old 05-03-03 | 02:07 PM
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From: St.Louis, Mo
Angry my car jerks when i get into gears realy bad and cannot accelerate above 2000 rpm

Alright Im having problem with the shifting I will drive for about 10 minutes and then when say Imshifting from 1st to 2nd I will get this violent jerking action and then the car won't spped up any more and it loses or doesnt have 3rd or 4th but this only seems to happen after its heated up a little bit and help would be greatly appreciated.
Old 05-03-03 | 06:48 PM
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ViperKillerWannabe's Avatar
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Sounds like your TPS is getting stuck. This is what mine does when that happens
Old 05-03-03 | 09:17 PM
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Mine too, it was the TPS -- a broken wire.
Old 05-03-03 | 09:22 PM
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It's unfortunate that mazda chose to use such a cheaply made component for such an important operation, then decide that they should charge $300 for a replacement.
Old 05-04-03 | 10:39 PM
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well what can I do to see if its the problem? it couldn't be changing of tranny fluid or something along those lines
Old 05-04-03 | 10:56 PM
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first test the tps to see if its any good. The haynes manual for you car will tell you how(the manual should have been you first mod). Learned that the hard way. If it is the tps try a local junk yard first, they have no idea how much to really charge for these parts. what type of tranny and how many miles
Old 05-04-03 | 10:58 PM
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Wait, it's an auto?
Old 05-04-03 | 11:28 PM
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He's got a series 5, think about this. 10 minutes are fine, then all a sudden it falls on it's face and won't rev up anymore? Can we say classic symptoms of OMP limp mode? I bet you that your check engine light pops on when it does that too.
Old 05-05-03 | 11:24 AM
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Before spending big bucks:
Spray some contact cleaner in the long range TPS barrel an work it in.
Home Depot has "QD contact cleaner" in the electrical section.
Radio Shack has some similar stuff.

That stuff is great for all kinds of old switches, buttons & ***** from the AC to the radio
Old 05-05-03 | 03:06 PM
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He's got a series 5, think about this. 10 minutes are fine, then all a sudden it falls on it's face and won't rev up anymore? Can we say classic symptoms of OMP limp mode? I bet you that your check engine light pops on when it does that too.

Yea, okay any suggetions if that is the case
Old 05-05-03 | 03:10 PM
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junkyard again. I think a new S5 OMP is like 1k dollars.

start pre-mixing on top of the OMP to be safe.
Old 05-05-03 | 03:24 PM
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I will say it one more time:

Originally posted by SureShot
Before spending big bucks:
Spray some contact cleaner in the long range TPS barrel an work it in.
The OMP is expensive but fairly reliable.
If the long range (upper) TPS gets dirty inside, the ECU will go to limp mode, because it needs that signal to run the OMP.
It's a simple fix - try it.
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