It didn't start till hrs later when it was cool.
Are you saying after it cooled for some hours the problem went away and it ran once again? Or is it DOA and won’t run at all?
You can eliminate the computer and all the sensors as I have the link so I can check those things easily. It has spark and fuel so you can eliminate the plugs, wires and coil. I did test the coil any ways and its fine. Also i replaced all the wires. i did put the old harness on just to check myself but didnt help
I suggest you don’t mentally eliminate ANYTHING until it’s fixed. I have been a hero many times by finding an issue the original troubleshooter dismissed as “couldn’t possibly be the problem”.
The only problem I could find was the vacuum advance was shot. I don't know how important it is but I have one coming next day from ss. It won't hold a vacuum. Would that cause it to not start. It's the A15 engine with the Mitsubishi distributor. I know it advances the spark but I thought it should still start.
It will start and run without vac advance, in fact the tune-up instructions have you disconnect it to set base timing (which should be 10 or 12 deg BTDC, depending on the exact engine. For instance the Thermalwave 5M manual lists 12, the Zeems troubleshooting manual says 10 - the engine will start and run with anything in this general range).
Anybody know why there are 3/8 antifreeze lines running through the throttle body. Heating the fuel? First time I noticed it. I thought they were fuel lines
I have seen several engines like this; typically it is to improve fuel atomization.
Remember, you have to have these things for the engine to run:
- Air and fuel (in the proper proportion – correct air-fuel ratio)
- Spark (at the right time – timing)
- Compression (blown head gasket, etc.)
Have you
for sure verified that you have spark and fuel (and presumably air)
during the actual failure mode (i.e. when the engine won’t start)? Then maybe check base timing while cranking (do you have a timing light?).
