After an improved compression test, numbers are up around 300 psi. Not great, but should be able to fire I imagine. The search continues. Going to start evaluating the fuel system for air.
I have not but that is first on my list of things to look at before looking at fuel supply further. The video you posted of where the oil comes out was very helpful. If I do not have oil at the injectors, given that I have good ICP and a good pulse from the IDM, would that indicate failed injectors? If so, what would cause injectors to be suddenly wiped out enough to cause a no start? I am thinking back to the driver’s initial observation of sludge in the oil when drained and white smoke (probably fuel-related) everywhere when the initial loss of power and stall happened.Did you ever confirm oil coming from the injector spouts while cranking? Without oil there is no point in looking any further until that is corrected
I am checking the voltage at the injector connector, with the connector disconnected from the injector, positive probe on the white wire, negative probe on the black wire.I still feel that this is electrical. I kinda quickly scanned the previous page and didn't see anything except for where you got 20v. Did you ever get a high voltage pulse from the idm? Voltage should be 100v minimum.
Also where were you checking the pulse voltage at?
sounds like all 8 are buzzing and at the same intensity, with the valve covers off they should sound louder in my opinion, but that could also be the audio quality of the camera. Also you should be able to count after the initial all at once buzz to each injector number.I took a video of the injector buzz test today. This is with the valve covers off. It’s about 90 degrees today.
I do not have a good injector, could possibly get one but that would require pulling one out of a friend’s van. I’d prefer not to have to do this but I will keep the suggestion in mind.Your buzz test is extremely quiet. Do you have a know good injector to plug in to hear the difference?
It has been very warm here too. Some days when we tried to start it it was close to 100 degrees. Also tried a known-good IDM with no change, though I did not do a buzz test with the good IDM, which I plan to do.Had a bad idm cause a weak buzz test like that here recently. Truck started slightly slow, but it was every warm out at the time. How many miles on those injectors, oil changes?
Truck has about 200,000 miles on it. I have zero clue about what maintenance was performed on the truck. Possibly not much, if the oil sludge that came out of it is any indication.Had a bad idm cause a weak buzz test like that here recently. Truck started slightly slow, but it was every warm out at the time. How many miles on those injectors, oil changes?