I had originally posted the stumbling no-start problem with my 744T on March 21st, and I want to thank everyone who responded for the info and what turned out to be quite an education for me. (No pain, no gain, maybe...) After checking fuses, R-Interference relay, FI relay, crank position sensor, fuel pressure and flow, both pumps, voltage at the injectors and spark, I finally looked at the plugs. (Maybe I shoild have done that first?) They were black and of course soaked when I pulled them. I replaced them and it started immediately. Embarrassing, but what a way to learn! I'll drive a week and then check the new ones to see if its running rich and then change the oil - I can't imagine that gas hasn't diluted the oil from 2 weeks of cranking without firing. Thanks again.

Jim Weiss
83 245T/M46, 90 744T/M46, 90 760T, 93 945T, want more ...

Hmm, you fouled those plugs but you still don't know why.. Any Codes?
02 sensor may be bad causing a rich mixture
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'75 Jeep CJ5 345Hp ChevyPwrd, two motorcycles, '85 Pickup: The '89 Volvo is the newest vehicle I own. it wasn't Volvos safety , it was Longevity that sold me

That's part of the mystery - it generated no codes before, during the "no start" or after. We'll see in a week or so, though ... Thanks

Jim

Start looking for the causes of a rich mixture...

That's why I'm driving it a while - I want to see if the plugs fouled because it barely started (for about a week) or if it in fact does run rich and they carbon up again. I think the PO installed a new O2 sensor, but I think it also could be the temp sensor... oh well, fun...

At least its warmer, easier to work on...

Thanks again

Jim