87 GXL wont start

[vex]

Originally Posted by Kevyn

ive replaced all filters, plugs, wires. I m the process of flushing the coolant, replacing all other fluid, and getting new hoses and belts. I guess in the mean time i should check compression.

Because you replace wires does not guarantee that they are without defect. You'll need to check the Resistance of each line to ensure that there is no break in the wire or tear in the insulation. Once that's done you'll need to verify the coils are functioning properly and delivering the proper voltage to the plugs as per FSM instructions.

Compression numbers are good to have, but require good battery voltage and cranking RPM. It's good to know that all 3-faces are holding compression as well as the total amount of compression they can provide. Or if you have the money you can purchase a rotary compression tester from one of the vendors on this site which will provide a much better analysis of the condition of the engine. I plan on purchasing one in the future, as I'm poor right now.