I recently picked up a new 86 SE V6. I found out after purchasing it, that it was very hard starting cold. It would take a few seconds, or sometimes a few attempts of cranking to get it to finally fire up. Knowing it hadn't been driven much over the past 15 years, I decided to do a tune up. New AC Delco plugs, wires, dist cap, and dist rotor. Once I was done, I went to fire it up and now it won't start.
The car cranks. It will crank normally for a few turns, and seem to "bog" down briefly before cranking strong again. I have checked fuel pressure. It primes to 40 PSI. Once the pump turns off, it settles down to ~10 PSI. Once I'm done cranking it, the pressure appears to be over 40 by the time I make it to the gauge, it again will settle down to ~10 PSI. Fuel pump sounds very quiet compared to my Duke Fiero. The relay does click. I have been unable to get it started with starting fluid ( a few second spritz after the air filter and then some cranking).
I figured it may be a spark issue. I tried replacing the Ignition Coil, same problem. I replaced the ICM, no help. Finally, I grabbed a spare spark plug and tested on cylinder 3's wire grounded to the engine. I have a spark...
Pep Boys tested my battery to be OK. 515 CCA.
I am completely at a loss. Does anyone have any idea where to look next? Thanks
1985 Pontiac Fiero 2M4