Rod hitting... - Page 12 - 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 02-10-2011, 09:50 PM   #111
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I did not. Are there writeups for either of those?
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Old 02-10-2011, 09:57 PM   #112
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Not that I have done, sorry.
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Old 02-10-2011, 10:23 PM   #113
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No prob! So would a test for those just be swap out for a good one?
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Old 02-10-2011, 10:38 PM   #114
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That would work, but not really a test. If I remember right, it'* check resistance, then put in a cup of hot water, the resistance will change.
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Old 02-11-2011, 07:48 PM   #115
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Ok, I unplugged MAF, and again, myflashing CEL goes away.

THEN, I rev it up.
It is ROUGH, kinda grinding ish noise?, and the lights(dash, interior, headlights, all) get brighter...I take foot off gas, and RPMs shoot down to below 1000, the lights dim, rpms then smooth out to the typical 1000 and normal lights.

Do the lights dimming and such have any hint for my problem, or is this just typical? lol..

(This is all I can do right now is little steps at a time, thanks to work and some other crap I got going on.. :/ )
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Old 02-24-2011, 01:20 AM   #116
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Plug pics will come tomorrow, but honestly, they all look pretty normal!! One is a LITTLE whiter, but not ash deposits, and not as white as the "hot" plug on the picture.

I'll have to make a video of this sound and see if you guys can determine something, but I might have to take it to a shop.

When I turn it off, there'* almost like I hear a vaccuum leak, a rush of air, but I might be hearing things? idk.
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Old 02-24-2011, 01:29 AM   #117
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You should hear no hissing when you shut the engine off. If you do then there is a vacuum leak. Check between the upper and lower manifolds. I had one that carb cleaner didn't really change the RPM. But I was able to see the liquid being sucked in. use more then just your ears, you need to use your eyes as well.
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Old 02-24-2011, 10:18 AM   #118
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There are moments where it shudders REALLY BAD when I'm on the throttle at 45, 50 mph. I let off and it coasts just fine, no shudder. Give a little gas, starts to shudder, won't go above 1500, 2000 rpms, but sometimes magically jumps out of its funk and stops shuddering.
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Old 02-24-2011, 10:23 AM   #119
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Kind of sounds like a blown intake gasket. My engine had that same problem, found I had a blown gasket between the supercharger and the intercooler plate under the snout.
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Old 02-24-2011, 10:28 AM   #120
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Quote:
Originally Posted by Danthurs View Post
Kind of sounds like a blown intake gasket. My engine had that same problem, found I had a blown gasket between the supercharger and the intercooler plate under the snout.

That sounds bad..
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