STILL fighting the p0171/p0102... - 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 04-06-2011, 03:44 PM   #11
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If you had a different idle when you sprayed there..then that is the only gasket there. If it'* not that..the EGR is leaking from the external. I've never found one to do that..but heck.. you got a serious issue.
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Old 04-06-2011, 10:55 PM   #12
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I know...:/ serious issue for sure. That misfire REALLY is scary.

New gasket on. Started it, same issues as always.
Sprayed starter fluid in same area, same idle change...it bogs down, then smooths out.
I'm spraying in that bottom of egr area..its also hitting where the tube connects to the EGR...not at the UIM, but at the EGR. Same results. so maybe it is the tube?
Unhooking battery cable to reset and see what happens overnight.

There couldn't be anything underneath/in the line of fire of my spray that would bog the idle could there?
Wanna make sure I'm chasing the right thing.

I really hope my LB1 and my p0300 are related...
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Old 04-07-2011, 07:39 AM   #13
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Pull the tube and ...oh wait, you say it'* rusty. But yet..you also keep saying UIM. Tube is from EGR to LIM and the LIM is aluminum material. They can't rust. Would you take a picture to show us the issue.
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Old 04-07-2011, 01:13 PM   #14
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My EGR. When I spray at the area circled in red, the idle bogs down then climbs back up.
Is my actual EGR leaking??
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Old 04-07-2011, 01:14 PM   #15
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Quote:
Originally Posted by jdaniels View Post

My EGR. When I spray at the area circled in red, the idle bogs down then climbs back up.
Is my actual EGR leaking??
Oops. heres the picture.
http://tinypic.com/r/27zjjhk/7
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Old 04-07-2011, 01:33 PM   #16
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Probably a bad EGR then.
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Old 04-07-2011, 01:41 PM   #17
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Is that common for that area to leak? That'* super weird.
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Old 04-07-2011, 02:08 PM   #18
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Being that we pointed you in every direction but that...I'd say no.
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Old 04-09-2011, 09:26 PM   #19
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1) how does the crossover pipe come off? sorry, misread/understood earlier.
2)would the 171, if it were EGR tube, cause THIS bad a misfire? in gear, revving it up, foot on brake, it wont go above 2000 rpm.
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Old 04-25-2011, 02:27 PM   #20
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Just drove it about 5 miles or so, after cleaning coil contacts. First time being driven in a month.

It does a rapid backfire during acceleration. When I'm coasting, its smooth. Slight backfire while accelerating until I start really trying..hit about 55 or so and its a rapid PPPPPP backfire.

Where do I go from here? I feel SO close I can taste it, since a month ago if you hit 55 it just wouldn't respond to me. So I'm so close. Any ideas?
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