no start

[Talon2139]

I have a 91 plymouth laser rs turbo. the guy i bought it from had the thing sitting for about 2 years, and tried to start it and it wouldn't for him. Now before all this apparently it was running before this 2 year period. the guy said he was having problems with the ecu, replaced it with one from a junkyard. I had it towed to my house and tried swapping out a ecu with one of my brothers ecu's that he was using for his talon project, and it started right up. So I had it running about one day, and tried using different ones, and one of the other ones worked, so we took it and drove it for about 5 miles down the highway and back. Turned back because it was overheating, and we barely made it home. So i beleive the problem is either warped head, and or blown head gasket, seeing since i got 40 psi, on one of the cylinders, in a compression test. Right now i am currently waiting for a fuel rail from ebay, because i foolishly tightened down the middle screw without the plastic spacer, so it is cracked. I am not really sure about the other three cylinder compressions, but if that one is that low, it has got to be the head, and or head gasket. any thoughts on this would be helpful. I know it is getting spark, and fuel so that is the only other thing that I can think of.

 

[Quicklynx]

I had the same problem when I bought my Talon, not with the ECU, but with the overheating. I found out I had a faulty water pump.

Loosen the belt on the pump and and then sort of try to move the pulley up and down. If there is any play that means the bearings are worn out. Another way to check is to listen to it. It should make kind of a moaning sound while the car is running, but it's hard to tell with all the other noise.

The other thing would be to watch the vent holes on it while the car is on. If coolant is coming out of them it means the seals are broken. it's hard to see the holes so you'll most likely need some light under there.

This is just a start to probably a few problems your car is having. It's definitely not limited to this