Jerky-ness

Apr 08, 2004 9 Replies
S

I have a 92 SC2(Manual) with 258,000 Km on it. Just the other day I started to notice that around the 2000 RPM mark, the car feels like it's jerking. I see no change in the RPM and at the higher speeds with higher RPM's its not noticeable. One thing I noticed this morning as I drove out of the driveway, that when the car is colder the jerkyness isn't as noticeable, seems to run somewhat normal.



When the car is warm, and I'm at a light. If I move able 5-10 feet then but the foot back on the clutch the RPM's just drop and it almost seems like it's about to stall.(and it did once yesterday).



So I'm starting to wonder if it's one of the sensors that has crapped out and needs replacing, since it's only acting up when the engine is warm. But which one? Temp Sensor?



Thanks guys!.


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D

Can anyone answer my question below??

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S

Hi, Dave, No, sorry, I can't. Have you asked your dealer's service folks? Good luck!

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D

They have been replaced and the plugs as well. The Engine module/spark plug module has also been replaced. She runs normal until the temp guage starts to move as the engine warms up then it starts to have that jerkyness.

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G

Has the vacuum EGR valve ever been changed? Are you getting any SES codes (and are sure the light does work)?

If the behavior is mainly after warmup, I'd bet on the EGR system. If it starts out as soon as you start the car, it may be the coolant temp sensor.

You can rule out the EGR by disconnecting and plugging the vacuum line that runs to the top of the valve. Drive the car and see if the symptoms disappear. Disconnecting the valve should set a SES code.

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D

I disconnected the vacuum line to the EGR valve I just placed some tissue around the vacuum line just to make sure nothing was sucked in. And the car ran just fine. So it's sure seems like it's the EGR Valve is the problem. Called Saturn for the part(I'm in Canada by the way) and thye wanted $170 and the other parts place wanted $120.

Thanks for the help/

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G

You can do better on the price.

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sells OEMparts. Their price is $75 USD. I've never bought from them but they getgood comments often from others. If you order the part, be sure to get anew gasket as well.

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B

Saturn sold me mine for $75 last year. + shipping. But they wanted $140 to replace it if they did the labor. This thing's pretty easy to replace.

*Almost* like replacing a lightbulb.
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D

Remember folks. I'm in Canada, that $170 was for JUST the part, not including the install. The cheapest I have found was $120 or so, they only had one in the warehouse and even then they weren't sure they did have one. I'll be heading to the US next weekend, so I'll check out one of the auto part places down there.

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