I suppose this is more of the same but.. . . I hoped I was doing a friend a favor when I helped him buy a 83 240 DL Auto. I thought him how to change ti oil and all that regular maintainance stuff. The main thing now is it quit while he was driving it. He called me. I assumed incorrectly it was the timing belt. I did all the things you do when a car won't start for whatever reason. I checked for fuel, air and spark. No spark evident. I checked fuses. No problem there. I checked the wires that go under the engine. OMG the horror!
It's all rotten or melted in the looms going all around the engine. I repaired or rerouted as many wires as I could find that were melted or bare. I am all over the engine compartment with multicolored wires. I rewired the wires going to the gray plug at the back on the firewall. Things were all melted together. I cut them all out and re-routed them. Still no spark. I have 12v at the coil but there is no signal to spark the coil.
What did I miss?? Is there a chance it fried the ecu? I did check the harness that leads to the ecu and those wires are intact. I checked the wires going into the distributer. They seem good still. Is there a simple way to check the ECU with a meter? Is there a fuse or a fuse link in the harness somewhaere that I missed?
Sorry for all the questions but I have worked on Volvos off and on for 20 years and this has me stuck. All help would be welcome. I don't want this young guy to be turned off by all this and junk it. (heaven forbid)