New glow plugs, barely starts now.

[young-gunn]

I've tried it with both my old glow plugs and the new ngk plugs. they seem to be about the same for starting, the resistance tests good on all of them. I agree it does sound like a glow plug problem but ive tested everything and there should be no reason for them not to work. if it stands for 5 or 6 hours I can try to crank it without the plugs and it doesn't fire. one cycle of the plugs and it jumps right to life. I am running rotella 15w40, always have, with a wix filter, oil was changed a week before my problem showed up.

[shokenore]

Does seem a bit weird
Does it start ok when you have your pan heater plugged in over night?

[young-gunn]

Yeah, as I mentioned I had it plugged in last night (I only have an inline coolant heater) it was fairly cold this morning, about -20 and one cycle of the glow plugs (until the beep) it fired right up. I had it unplugged from friday to sunday, it was about +2 on sunday and it wouldn't start like it should. fuel had stayed primed, I checked the primer before I tried to start it and it was hard.

[shokenore]

I am tempted to think that the relative thickness of your engine oil may not be helping the situation.

[young-gunn]

I have my new engine temp sensor and should have my intake air temp sensor tomorrow. I will install those and go from there.

[young-gunn]

Installed both sensors, no real change. Been running the old glow plugs and they were starting a little rough and not really liking cold weather. Threw the new glow plugs back in yesterday and it's really having a hard time starting again. I don't get it, these are the new, proper plugs and they're worse than the old ones. Going to dig into possible timing issues when I have some time away from work. I can't think of much else anymore