Stuttering, lack of power problem... - Page 5 - 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 11-16-2006, 02:46 PM   #41
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Quote:
Originally Posted by canaris
So does the car run better..would you say your problem is gone?
It seemed to be running better, but it was also warmer out. I parked it last thursday so I can go hunting and got back to her on sunday. Started it up and it seemed to be missing badly, almost to the point of dying. And again, yesterday, my check engine light was on after I started it up with the Astrostart, but it wasnt really running poorly. I may go across the vacuum lines again to make sure I didnt miss a leak anywhere.

I also have a new fuel filter to put on, just have to get it done now.
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Old 11-16-2006, 03:47 PM   #42
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Quote:
Originally Posted by lglarum
Changed most of the vacuum fittings, have the lower "T" fitting that goes into the throttle body on the way (cracked it putting on a hose clamp, oops). It seems now that the check engine light comes on when it'* cold and I use my AstroStart. It also seems to miss a little bit at idle, hovering around 800RPM. If I just hop in and start it, it seems to run fine, except my Traction Off light being on until it warms up.
GM quick lube also said that i need a new serpentine belt(I'll check that for myself), tranny service because of a leak, and they found a light intake leak...
What do you mean by "a light intake leak..."?
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Old 11-16-2006, 05:18 PM   #43
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Quote:
Originally Posted by lash
Quote:
Originally Posted by lglarum
Changed most of the vacuum fittings, have the lower "T" fitting that goes into the throttle body on the way (cracked it putting on a hose clamp, oops). It seems now that the check engine light comes on when it'* cold and I use my AstroStart. It also seems to miss a little bit at idle, hovering around 800RPM. If I just hop in and start it, it seems to run fine, except my Traction Off light being on until it warms up.
GM quick lube also said that i need a new serpentine belt(I'll check that for myself), tranny service because of a leak, and they found a light intake leak...
What do you mean by "a light intake leak..."?
That'* what they put on the invoice as a note. One of the things they noticed when they changed my oil.
Also, the car was doing the same thing today when I started it up. I went outside and it was sounding bad so I ran inside to get my camera and take a lil video. But by the time I got back outside it wasn't doing it anymore.
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Old 11-17-2006, 09:35 AM   #44
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Well, you DO need to thoroughly go over the vacuum line connections again. Don't forget the ones at your Evap. Cannister. Personally, I recommend replacing them all at one time. For the straight ones, just buy some rubber vac. line (about a foot of each size) and cut short pieces.

And...do yourself a favor and take a good close look at your intake area and look for anything unusual, like cracks, fluid, etc... That "light intake leak" needs to be addressed until you know what it is.
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Old 11-17-2006, 01:45 PM   #45
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Quote:
Originally Posted by lash
Well, you DO need to thoroughly go over the vacuum line connections again. Don't forget the ones at your Evap. Cannister. Personally, I recommend replacing them all at one time. For the straight ones, just buy some rubber vac. line (about a foot of each size) and cut short pieces.

And...do yourself a favor and take a good close look at your intake area and look for anything unusual, like cracks, fluid, etc... That "light intake leak" needs to be addressed until you know what it is.
I replaced the ones around the evap canister as well as all the connectors going from the TB to the Trans and the Evap. One thing though, what is the small what appears to be a filter in-between vacuum lines that goes into the trans. Looks almost like a very small fuel filter for a 2 stroke engine, but is all black.
Also, the UIM was replaced about 30K ago, just after I bought it.
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Old 11-18-2006, 10:24 PM   #46
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lglarum, have you checked for fuel leaking out the fuel pressure regulator vacuum port and into the vaccum line?
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Old 11-21-2006, 05:42 PM   #47
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lglarum, have you checked for fuel leaking out the fuel pressure regulator vacuum port and into the vaccum line?
Checked before and after I took it for a lil drive, nothing.

Changed the fuel filter finally, there'* definitely some resistance when trying to blow through the old one compared to the new.
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Old 11-25-2006, 01:07 AM   #48
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Gettin a new FPR tomorrow, hopefully it'll help. It should only be about $50 with my connection at NAPA. After sitting for about a day it tried to do it'* rough idle thing again right after I started it.
Also, what is this...

It looks like a small filter in the vacuum line attached to a canister going into the transaxle.
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Old 11-25-2006, 12:11 PM   #49
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That'* a check-valve for the shift modulator.

Which brings up a point. Have you checked for vacuum leaks using the carb cleaner method at idle?
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Old 11-25-2006, 06:12 PM   #50
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Quote:
Originally Posted by willwren
That'* a check-valve for the shift modulator.

Which brings up a point. Have you checked for vacuum leaks using the carb cleaner method at idle?
No I haven't tried the carb cleaner method. I'm assuming you spray the connections with carb cleaner and if I hear a change in idle, I found a leak?

How about this thread dealing with the IAC valve??? It seems to have my symptoms as well. How would I clean it? Carb cleaner again?
http://www.bonnevilleclub.com/forum/...t=carb+cleaner
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