OK, here's the scoop: GMPP crate 350 H.O. with stock '92 TPI unit and a 700R4 trans.

Ran great last summer and fall. No problems.

Started it once this winter, and it ran very rough. I goosed the throttle a little and it died. It did NOT want to start after that. I installed a fuel pressure gauge and it's all good. I changed the plugs, which looked a little fouled, and still nothing. Then, one day when it was warm outside, I tried it again. I got a large PUFF of white-ish smoke out the air filter and it fired right up. Car has started fine since then. It does seem to run a little rough until it warmed up, and then it ran like a top. Until yesterday...

I had started the car and moved it outside. It was running sort of rough, but it was still cold, so I just let it idle a bit. It died. And now it won't start again. No way, no how.

No codes. No check engine lights. Fuel pressure is fine. New-ish plugs, although to be fair, I haven't pulled them and checked them again (headers - sometimes a good thing, sometimes not!).

Where to start (no pun intended)? Any ideas?

Thanks!
Hartz

 

A large puff of whitish smoke out the air filter on a TPI set-up. That is :werd:. Just a suggestion here, check the distributor cap and rotor for moisture and also pull the dipstick and look at the oil.