It started with a timing chain.... - Page 4 - 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 02-09-2005, 06:05 AM   #31
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The misaligned chain theory was giving me nightmares so I went ahead and hooked the o-scope up. I got .002 milliseconds worth of slop at 1500rpm. That'* about .05*. The marks are aligned perfectly.

I was cleaning the car out and found a package of 6 spark plugs in the rear floorboard... I'll go ahead and install those at dawn.

The cold starting is getting better, Only one little stumble today, It must be learning. Everything shows the car is leaning itself to correct.
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Old 02-09-2005, 11:09 PM   #32
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Hmm... Pulled out white dust coated ACDelco 41-601'*, Installed New AC 41-601'*. I must be lean, Or I was lean.

I'm only stumbling in high torque conditions. Getting on the highway is fun. This on/off bs has come back, I'm good at 1500rpm and 25% TPS, push it to 2Krpm and it stumbles/misfires. I'm thinking weak spark or low fuel pressure. I mounted my fuel pressure guage so I can monitor it.
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Old 02-09-2005, 11:13 PM   #33
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I think justin said the '87'* won't work... How about my sister'* 90 Vin C?
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Old 02-09-2005, 11:26 PM   #34
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She'* got magnavox? Hmm... Well, Testing is testing. *writes note for morning*
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Old 02-10-2005, 02:32 AM   #35
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Had to run up to work for a bit, She ran perfectly. I was not speeding by the end of the on ramp.
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Old 02-14-2005, 09:51 PM   #36
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Hooked up the Magnavox, That didn't work very well. I see 40* of timing advance when I get on it... I'm gonna have to read the FSM.
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Old 02-15-2005, 08:30 AM   #37
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i think we are all stumped
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Old 02-15-2005, 11:22 PM   #38
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Took the car to go get tires and conned them into checking out the motor for free. I got three ASE mechanics to look at it and talk to me for a bit, They're figuring either a vacuum leak between two different materials, Like plastic and metal, Or faulty injectors. Since I have no way to watch the injectors spray I'll just assume it'* a vacuum leak. I'm figuring between the UIM/LIM or maybe at the UIM/TB. I'll have to check into it.

Met a guy up there in a '92 88 Royale, We talked for a bit. Oddly enough he says it stalls on right turns... Wonder why... Good thing I've got a '94 tank in my shed.
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Old 02-15-2005, 11:36 PM   #39
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My idle hasn't been right since I did my front cover gasket (and I'm kicking myself for not doing the chain while I was in there). My guess is vacuum leak but noone has or can get just a vacuum manifold gasket without the rest of the top end gaskets.

Oh, the 92 guy is more likely the strainer than the tank. I've got like three extras for two different kinds of pumps. They are cheap, just take a while to get to.
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Old 02-15-2005, 11:41 PM   #40
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Quote:
Originally Posted by jwikoff99
Oh, the 92 guy is more likely the strainer than the tank. I've got like three extras for two different kinds of pumps. They are cheap, just take a while to get to.
Aye, but with the dents in his and the need to pull it anyway, a swap is a good idea.

And the UIM/LIM don't use a gasket, the TB/LIM is reusable.
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