94 850 2.4 liter not starting

castiron · Post by **castiron** » 21 Jan 2006, 15:46

160000miles non turbo 5spd

Engine cranks and barely fires but does not start. the plugs looks like it ran pretty rich. I tried putting heet in the gas, but with no effect.
I have spark, fuel pressure (43.5 psi), noid light to all the injects flashes. No codes are being thrown.

How do I check the MAF and 02 sensor?

Post by **MadeInJapan** » 22 Jan 2006, 09:52

Unplug the MAF and see if it starts without it. If it does, then it's your MAF. Others can chime in about the 02 sensors, but truly, neither of these may be your issue.

moveright · Post by **moveright** » 22 Jan 2006, 17:38

well, it is NOT the 02 sensors. the 02 sensors don't produce info that the computer can use until atleast 2 minutes after the start.

I'd check the coil. if you are saying that it is TRYING To start and firing a little, it has spark and fuel, then look at the coil. is there any "dust" on the sides of it? usually, these coils carbon track and ground out. the result is a spark at the plug, but not enough.

look at that coild for me REALLY good. if it does'nt look right, even a little bit, grab another.

moveright · Post by **moveright** » 22 Jan 2006, 17:40

and also, I've seen countless cars do this. the coil thing. as far as the MAF, he's right, just unplug it to test it. the maf readings, even if they are off will not cause a no start.
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utvol1984 · Post by **utvol1984** » 26 Jan 2006, 11:16

I don't mean to be a pessimist but I have a 93 850 GLT that (according to the former owner) just wouldn't start - turns out it was a blown head gasket. If you've tried everything else maybe do a compression check. Beyond that I could fit in a thimble what I know about Volvos. Good luck.