smirking

Picked up this car 2 weeks ago with a no start problem, mechanic replaced fuel distributor, would only start when starting fluid was used.
Turns out the fuel distributor he installed was non functional, stuck plunger.
Replaced and starts fine but runs bad.

Primary ignition is new,coil tested and replaced for fun, no improvement, engine won't rev past 3500-4000rpm,.
NO vacuum leaks.
I am convinced it is electrical based on the timing light,actually experiences loss of spark to #1 wire, intermittently.
Computer and hall sensor were also replaced.

Any suggestions or guesses are appreciated.

Blewtoon

Wires-cap-rotor?

4corners

proper fuel pump relay?

Katman

Try timing light on coil output to see if you have total loss of spark (or weaker spark).

IF it's not the coil, and you think wires are good (look for sparks in the dark?), and already replaced Hall sender, maybe the power module that the hall sender goes into, that runs the coil? (up over the glove box).

Far as I know, ECU has nothing to do with spark.

smirking

Good idea with the coil lead Ill try that tomorrow

smirking

Bypassed the relay

smirking

Primary ignition is all new, and also swaped with parts from other cars that are running properly

shortyq

I had a similar situation with a CGT I acquired. The PO had dialed the fuel really rich so it would run, but negated to find the timing control unit fuse and insert it. The test for this is to dial the 3mm allen for more rich, eventually the car should run over 4000rpm. Then test the circuit (fuse first) to the timing unit, make sure it has 12v power. Once it does, you can return the fuel back to normal consumption. You could have a bad fuel pressure regulator and/or a bad differential pressure regulator. Ck the timing computer first, or you will want to replace the DPR and it will still run like crap.

HTH

Scott J