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Discussion Starter #1
I looked at an 86 GLHT a guy had for sale today and have a few questions. The car doesn't run right, it is a bit hard to start and misfires. The guy said that it used to run fine and then he swapped ECUs and it ran bad on the new ECU so he put the old one back in and it still runs poor. He says the car breaks up when it hits boost.
I did a little bit of looking around under the hood and when I removed the plug wire nearest to the driver fender the rpms barely dropped. I am thinking he may have hurt the rings with the bad ECU or there is something he isn't telling me. Also there is no air tube connecting the air box to the box on the driver's fender. Where is the Air Flow Meter located on these cars. I put my hand on the exhaust while it was running and it seemed consistent.
Is there anything particular to look at with these cars. Is there a reason why it would run fine one day and misfire the next?
The guy is asking $1500 obo for the car and it is almost rust free, the interior isnt great, and the paint is a bit faded.
Thanks
 

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No MAF on those engine. They rely on speed density with the O2 sensor.

The problem vs the reason why are fishy...

That wouldn't be for a car in Quebec for fun?
 

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Discussion Starter #3
The car is in MD. I am going to look at it again and do a compression check and if that is good I may make an offer.
 

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I would also do the ign switch dianostics check while your there to check for any fault codes.

One of my GLH's that I had years ago ended up having a wiring problem because of battery acid corroided the wiring coating and it was shorting out the computer and other things too. This was right behind the battery below the air hose from power module to the air box, Check that area out. It sounds very simular to what I was experiancing with my GLH-T.
 
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