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Thanks Thefermanator for the feed back is there a way to test each injector circuit so I can at least try and troubleshoot it and see if the control circuit is good or bad instead of turning my ficm in to have it rebuilt or do they have a plug and play ficm

Really sorry guys but I’m using a Chevy programmed diagnostic I haven’t been getting any code it just pops up no codes present. So Rockabilly rat I’ll check the return flow today and see what I get. But even with a couple of bad injectors wouldn’t it even try to at least start or cough cause I’m...

We put the diagnostic scanner on it and the scanner read desired fuel rail pressure 5945 psi and when we cranked it the actual fuel rail pressure was 22,053 ild figure it was enough to at least get it started also we cranked the engine to build pressure and crack open one of the injector line...

I think I narrowed it down to the injector module I have high pressure from the pump, I have ready from the cam and crank sensor but the injectors don’t open to make it start ohm the wires and I have continuity from injector to icu. So I think I narrowed it enough.

Thank you Rockabillyrat as far as lift pump got it, the service port found that out when we tried priming while holding down the center stem. Yes we’ve bled from the filter to the service port to make sure fuel it was going through and we have a scanner the said accepted fuel pressure range and...

Hi guys we have a 04 Chevy C4500 diesel and it died on the road and had to be towed back to our shop it’s 3 days where we’ve tried 4 different scanners and it’s coming up no codes but it won’t start can someone help me I’ve changed the filter primed it check fuel from the bleeder near the...