1989 corvette shuts down
I have a 1989 corvette. The car will start up fine if the vehicle is cold. After the vehicle starts to get warm, it will start breaking down and missing, then it will shut off. You have to wait until it cools down before it will restart. Replaced pick up coil, tested distributor module repeatedly and it never failed. Any suggestions?
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Checking the car for stored trouble codes is a great place to start. Checking fuel rail pressure would also be a good step.
:thumbs: p.s. If the fuel injectors are "stock" remove them and then throw them as far as you can....install new ethenol compliant fuel injectors. |
Runs fine in open loop? bad in closed loop? Check injectors.
Corvette Mike |
1989 corvette shuts off
Fuel pressure at the rail was checked and fine. It will run fine until it goes to a closed loop, then it will cut off...
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was that dizz module tested while 'hot' ?
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1989 corvette cuts off
The distributor module was actually taken off of the car and taken to a local Auto Zone. I had them test it over 30 times repeatedly back to back. The module was too hot to touch.
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Originally Posted by gravesjoey
(Post 1573257550)
Fuel pressure at the rail was checked and fine. It will run fine until it goes to a closed loop, then it will cut off...
:bigears Check for "open" or "shorted" to ground o2 sensor wire and/or failed o2 sensor. :thumbs: |
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ohm out your injectors when hot. Should be around 16 ohms.
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1989 corvette cuts off
I will try ohming the injectors when i get home. Is it possible that a distributor module would act differently while driving? Meaning....Is it possible that even though it tested fine at Auto Zone, that it could act differently while installed on a vehicle?
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1989 corvette cuts off
Originally Posted by CorvetteMike2004
(Post 1573259158)
Yes.
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I had the same problem with mine. Went to autozone to have the module cycled (only did mine 10 times though, it neverfailed), it heated up but didn't get really hot like it would being on the car.
Everything on the car seemed to check out fine, but after i drove the car for about 20 minutes, no spark. It did this repeatedly. So I rolled the dice and changed the module. Cleaned the old compound off, applied new compound, and the car hasn't shut off since. Been about 5 months now. If everything checks out, "might" be worth a try. |
Originally Posted by CorvetteMike2004
(Post 1573259280)
Im not guaranteeing this is your problem. My best guess would be this (dizz module) if its dying when getting hot.
That part breaks down when it gets hot. my second best GUESS is a sick o2 sensor...if your existing o2 sensor is more than a couple of years old, a new sensor is a good investment for top engine ops anyhow, but ez to watch the o2 sensor voltage while engine runs using a scanner...voltage should continuously vary above/below o.5v, bad ones will most often read 'something' at cold start, then hang at o.2v or less as engine warms...shorted wire or corroded connector typ s near/at 0.0v immediately on startup...if changing an o2 sensor, most unscrew much better when too hot to touch, NEVER use excessive force as the threads in the pipe/manifold may be ripped out...let things cool off and use anti-sieze when installing another o2 sensor (new sensors typically come already coated with anti-sieze) |
1989 Corvette cuts off
Thanks. I have been really busy the past 2 days and haven't had a chance to check anything yet. I will post back as soon as I try a few things.:)
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keep me in the loop I have the same problem:cheers:
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SAME problem here too...
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