1989 strumbling when hot with no code

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Jun 2, 2007 | 12:20 AM

#21

Sam Lam

Melting Slicks

Joined: Apr 2002

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From: St. Charles, MO Route 66 Corvette Club

Quote:

Originally Posted by philou

I wonder why injectors are bad after 30-40miles (or 1 hour) and not at cold engine...

The difference between a cold engine and warm engine is ECM open or closed loop operation. The engine will start and idle (fast) in open loop with injector problems. As the engine get hot and goes to closed loop, the ECM attempts to place fuel into the engine which the injectors (clogged or dirty) cannot deliver.....and you have a stumble problem without any ECM codes. This make sense?

Jun 2, 2007 | 05:46 AM

#22

philou

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From: Normandy

Thank you Sam lam, I understand now

Jun 2, 2007 | 08:55 AM

#23

Casethecorvetteman

Le Mans Master

Joined: May 2005

Posts: 5,214

Likes: 65

From: Queensland, AUSTRALIA

Quote:

Originally Posted by Sam Lam

I would bet a six pack of good beer .....

How about XXXX Bitter mate?

Jun 2, 2007 | 10:27 AM

#24

philou

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From: Normandy

Jun 2, 2007 | 10:41 AM

#25

Casethecorvetteman

Le Mans Master

Joined: May 2005

Posts: 5,214

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From: Queensland, AUSTRALIA

to you too mate

Let us know what you find with your car

Jun 2, 2007 | 10:51 AM

#26

philou

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From: Normandy

Quote:

Originally Posted by Casethecorvetteman

to you too mate

Let us know what you find with your car

Myn nightmare is not over: In changing spark plug wires, one was burned.
I think: "That is the bug"...
I drive and after 1 hour: SES...... code 12

When I don't accelerate, the engine sometimes stops.
Does the ECM could give this problem ??

1st: when it's open loop: good but when it's closed loop, sometimes there are problems but not always