1989 corvette with weak pulse
 

no power out of MAF relay. oil pressure switch ok. car bearly runs with weak pulse. Any suggestions is greatly appreciated.

Mike

RE: 1989 corvette with weak pulse
 

not sure what exactly you mean, if its losing power though your cats, pre cats could be clogged up, you could either remove them and unclog them or just take them off all togeather, depending on where you live.

RE: 1989 corvette with weak pulse
 

I cannot drive car as after starting it, it will die as if it is out of gas. Mechanic checked it out and said I was not getting 12 volts out of MAF and there was a poor pulse on the injectors. Any suggestions is appreciated! Thanks!!

Mike

RE: 1989 corvette with weak pulse
 

Oh, the machanic said it was not the cats.

RE: 1989 corvette with weak pulse
 

correction from previous thread :

vette is not getting 12 volts to MAF

RE: 1989 corvette with weak pulse
 

Was there any work done on the car just before this happened? It sorta sounds like maybe you've lost a ground connection some where near the relays. Or maybe it's as simple as a bad maf relay?
Ron

RE: 1989 corvette with weak pulse
 

Finally, autozone sold me a bad ECM. Vette back on the road and running. Thanks so much for all your help!!

Mike

RE: I spoke to soon
 

I put new ECM in and it ran good while driving it around for about 30 minutes. The next morning after running it for about 10 minutes it went back to the same problem: When I give it gas it dies!

I believe it got a power surge of some kind to the ECM (probably damaging it again). Any suggestions is appreciated!! Thanks!

MIke

RE: not fixed yet
 

I put new ECM in and it ran good while driving it around for about 30 minutes. The next morning after running it for about 10 minutes it went back to the same problem: When I give it gas it dies!

I believe new ECM gone again. Poor pulse again. Any suggestions is appreciated!! Thanks!

Mike

RE: not fixed yet
 

If the car is eating ECM's I would start checking for shorted wiring and components, also check the voltage while the engine is running, low voltage will affect the capability of the ECM to handle inputs and outputs, high voltage could smoke the ECM.