My car cut off on me this morning... - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 06-15-2004, 04:31 PM   #21
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Quote:
Originally Posted by jr's3800
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I've looked through this thread and thought about one possibility, usually happens more on Fords, but here goes: Could the fuel pump be overheating and shutting down (vapor-locking)?
I don't think it will vapor lock.... Usually if the pump is weak there will be some warning... But its totally possible for the pump to fail outright... A fuel pressure test may be in order... I think if I remember right the fuel pump is priming... But it may have been a good idea for him to check his fuel pressure... If it was close to 40 Psi than we'd know the problem was elsewhere...

I get the feeling that the fuel pump is not the case, but it too should be looked at just incase( fuel pressure check )...
That'* true. On the Contour I had, it would just suddenly quit like that, but just before, if you got out of the car, you can hear the pump whining faintly, and would only happen after running for a while. That was the sign it was over-heating and starting to vapor-lock. Happens more commonly on the trucks and vans, though.
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Old 06-15-2004, 09:14 PM   #22
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Yeah, it primes just fine. I'm just gonna bite the bullet and put in the shop to be fixed correctly (and my pockets drained :( ) I don't want anything else to go wrong with it befor I can start on the restoration of it. I'm still gonna get a fuel pressure gauge though
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Old 06-16-2004, 08:12 PM   #23
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I surely will!! It'* going in Friday morning.
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Old 06-19-2004, 11:01 AM   #24
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Hi all!! I took the car to Auto Zone and had it diagnosedfor free; it'* either the Control module or the Cam sensor!!
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Old 06-19-2004, 01:28 PM   #25
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Good idea Don.....Tonio, if you haven't taken it in yet, swap ICM/Coil assemblies with any other 3800, regardless of year. 30 minute job. Might be time to upgrade to a type 2 system from a wrecker. They're a hotter spark, and upgradeable.
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Old 06-19-2004, 07:14 PM   #26
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Have had a number of bad ignition modules. Common symptom was start and run for a few minutes occasionally, no fire atoll more likely. Module would usually test good at AZ on the Wells tester (have talked to Wells about it). In each case a new module cleared the problem. I now keep spares around.

By all means if you can find an ignition assembly (3800 used the Magnavox to 1991 and the Delco through 2002 at least. They interchange) to swap, try it. If cures problem, there you are.

Swapping the entire ignition assembly, from plate to coils, is much faster than just swapping the module. Six plug wires, three nuts, and one screw-on connector.
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Old 06-19-2004, 11:44 PM   #27
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It was a code 41. I think I'll follow your suggestions about the whole assembly swap. Any ideas on the cost for the parts? The guy even gave me the key to make the codes flash! Heh, I live close enough to AZ to drive there, get the diagnosis, and drive back before the car cutoff This is the most helpful forum I've ever been to!!
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Old 06-20-2004, 02:32 AM   #28
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Well code 41 IS the cam sensor. I had mine go on my ( I was passing another car and it was reving a little high and I guess the cam walked). It ended up that the magnet got hit and needed to get replaced. If you do get it replaced get the spring and button changed too. They sit at the end of the cam and hold it in place against the timing cover.

BUT you car should still run, I didn't notice that much change in the car when mine was gone, maybe not as much get up and go but it was very driveable.

It is possible you have more than one problem too.
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Old 06-20-2004, 11:17 AM   #29
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Am seeing a lot of code 41 problems recently that relate to the magnet breaking off the sprocket, I suspect it is an ageing plastic thing. My 88 did it two years ago. Usually seems to happen right after a high rpm blast.

In the process I came up with a process to replace the magnet that only requires removal of one bolt. See http://www.6007.us/cammag.htm
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Old 06-20-2004, 03:22 PM   #30
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I'm pretty much the only one not afraid to touch mine; the other people I know with them are too scared to touch anything under the hood except for the dipstick I found a solution from another member in the for sale section here so hopefully that will help me out. I'm still going to have the cam sensor changed though.
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