93 SE having issues with engine speed - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 08-13-2005, 09:00 PM   #11
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Well, kicked the cat today, and there was no rattle or blatent givaway that it was in need or replacement.
Could it be the fuel filter going bad/ is bad?
Where is the fuel filter located so that I can check it?
I appreciate all of your help guys!
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Old 08-14-2005, 01:17 AM   #12
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If you own a 93 with 125,xxx miles and you don't know the location or the condition of the fuel filter........then it NEEDS to be replaced.......end of story!

Kicking the cat is not a reliable test. Although it may be fun, it will not tell you the condition of the cat.

You need to do a back pressure test to determine the condition of the cat.
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Old 08-14-2005, 01:25 AM   #13
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90% of the time, kicking the cat will produce an accurate diagnosis. If it rattles badly, it DOES need to be replaced. 10% of the failed cats I've seen made no noise. It'* a quick test you can do in your driveway.
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Old 08-14-2005, 01:47 AM   #14
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Not trying to disagree with you willwren, but a "rattle" test is not 100% accurate. I see plugged converters on 30,000 mile cars that make no noise at all. I see plugged converters on 140,000 mile cars that make no noise at all.

The "rattle" test is just a simple-means nothing-test. The O2 sensors themselves rattle by desighn. Not loud, but they do jingle.

Back pressure is the only true method to test for a restricted converter.
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Old 08-14-2005, 12:10 PM   #15
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ok, I need to replace my fuel filter, but where is it?
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Old 08-14-2005, 12:15 PM   #16
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Quote:
Originally Posted by 1fatcat
Not trying to disagree with you willwren, but a "rattle" test is not 100% accurate. I see plugged converters on 30,000 mile cars that make no noise at all. I see plugged converters on 140,000 mile cars that make no noise at all.

The "rattle" test is just a simple-means nothing-test. The O2 sensors themselves rattle by desighn. Not loud, but they do jingle.

Back pressure is the only true method to test for a restricted converter.
He has no O2 sensor in his cat for that year. The 'kick test' I mentioned is a good 'DRIVEWAY' check as I mentioned earlier, and CAN give an indication ot trouble.
Furthermore, on a car of that age, if the Cat is stock (oem crimp welds) it more than likely needs to be replaced.


Puddy, your fuel filter is just on the inside of the passenger frame rail about under where the RF passenger'* feet sit. Quick release clips on fittings and a 10mm for the retainer. YOU WILL STINK, so wear grubby clothes.

In general, if the problem seems to get worse with higher temps, it'll be your cat more than the fuel filter.
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Old 08-14-2005, 12:24 PM   #17
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ok, now we're cookin with gas!
thanks for the info will, it makes this task a lot easier.
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