Have a customer truck in the shop and trying to figure out a no start issue.
Truck cranks like crazy but won't start unless it gets a sniff of ether.
Doesn't matter whether it was running and shut off for only a half second. Always needs ether.
When it is running, it runs fine and it will run all day until shut off.
Getting active injector current faults on all 6 injectors while running.
Cylinder cutout test works fine.
It's a 1992 7LG 3176
All this is leading me to think that the ECM is shot. Which is weird since I can connect to it and it does run.
Have not installed sight glass in fuel system since I don't think it would lose prime that fast. Plus when I pump the primer hand pump it's stiff right away.
I have checked the timing sensor. It is receiving and sending proper voltage during no crank and cranking conditions.
Any other opinions?
Truck cranks like crazy but won't start unless it gets a sniff of ether.
Doesn't matter whether it was running and shut off for only a half second. Always needs ether.
When it is running, it runs fine and it will run all day until shut off.
Getting active injector current faults on all 6 injectors while running.
Cylinder cutout test works fine.
It's a 1992 7LG 3176
All this is leading me to think that the ECM is shot. Which is weird since I can connect to it and it does run.
Have not installed sight glass in fuel system since I don't think it would lose prime that fast. Plus when I pump the primer hand pump it's stiff right away.
I have checked the timing sensor. It is receiving and sending proper voltage during no crank and cranking conditions.
Any other opinions?
3176 only starts with ether
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