Trying to help a friend that just bought a '89 LX 5.0. The car is a stock auto besides BBK shorty headers.
The car ran and drove fine when he bought it two weeks ago, but at WOT, the check engine light would come on above 3500rpms, then would go back off as soon as you let off the throttle. Otherwise would run and idle fine.
So he changed spark plugs and wires with Autolites and Napa premium wires to see if that would help the WOT issue as the plugs were pretty dirty. Well after that, the car wouldn't even turn over. With three known good batteries. The negative terminal started smoking so we stopped trying to turn it over and he eventually replaced the starter solenoid and the positive and negative wires all the way from the block/frame to the battery.
After the new battery wires, the engine will fire now, but only if you hold the throttle halfway down and even then it runs like crap and will die as soon as you let off the throttle.
He triple checked and then I triple checked that he ran all the plug wires correctly. But another thing he did was spray throttle body cleaner into the throttle body because it had a lot of crud built up around the blade, and then he cleaned the MAF with MAF sensor cleaner making sure to put everything back how it was.
Do you guys have any idea what the issue could be? Trying to think of more info to add but I'm typing this at work
The car ran and drove fine when he bought it two weeks ago, but at WOT, the check engine light would come on above 3500rpms, then would go back off as soon as you let off the throttle. Otherwise would run and idle fine.
So he changed spark plugs and wires with Autolites and Napa premium wires to see if that would help the WOT issue as the plugs were pretty dirty. Well after that, the car wouldn't even turn over. With three known good batteries. The negative terminal started smoking so we stopped trying to turn it over and he eventually replaced the starter solenoid and the positive and negative wires all the way from the block/frame to the battery.
After the new battery wires, the engine will fire now, but only if you hold the throttle halfway down and even then it runs like crap and will die as soon as you let off the throttle.
He triple checked and then I triple checked that he ran all the plug wires correctly. But another thing he did was spray throttle body cleaner into the throttle body because it had a lot of crud built up around the blade, and then he cleaned the MAF with MAF sensor cleaner making sure to put everything back how it was.
Do you guys have any idea what the issue could be? Trying to think of more info to add but I'm typing this at work