would a bad o2 sensor cause a rough idle?

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Feb 10, 2005 | 10:16 AM

#11

Sol

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Have you had your car scanned?

It could just be something basic, like you needing a tune up?

Feb 10, 2005 | 11:26 AM

#12

1993 SLE

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agreed there could be a stored code.....as said before dont just throw parts at this problem

Feb 10, 2005 | 03:50 PM

#13

zo6vette

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yes i have scanned the car there is no codes at all and i have just done recently a tune up on the car

Feb 10, 2005 | 03:51 PM

#14

willwren

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I strongly suggest removing the TB for a very good cleaning. With the MAF sensor removed.

Feb 11, 2005 | 12:14 AM

#15

zo6vette

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i did clean the throttle body today and i still have the rough idle, still i have no codes at all

Feb 11, 2005 | 02:38 AM

#16

willwren

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We need to get you hooked up with one of our members that has a scantool. Can you put your location in your profile?

Feb 11, 2005 | 06:33 PM

#17

zo6vette

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iam from downers grove, illinois.. i do have a scan tool that shows live data and i looked at it and everything looks good and no codes at all

Feb 13, 2005 | 04:42 AM

#18

popatim

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Check for consistant spark at each cylinder then if thats ok....
Suspect a vacuum leak. They are notorious for rough idle with no codes.

Feb 13, 2005 | 06:53 PM

#19

helikon

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And after you check everything else suggested,you might consider a stretched timing chain causing the lousy idle if the car has alot of miles on it.I'm guessing it does being a '95.

Feb 13, 2005 | 08:20 PM

#20

zo6vette

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Quote:

Originally Posted by popatim

Check for consistant spark at each cylinder then if thats ok....
Suspect a vacuum leak. They are notorious for rough idle with no codes.

what would be a good way to test for vacumm leaks? also where and what are the common vacuum leaks on the 3.8 series 2 engine?

ttt

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