Medium and Heavy Trucks
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My name is ***** ***** I am a professional here at Just Answer. I noticed that your question had not received a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.My info is somewhat limited on your model here but I had seen no one else has responded and would like to see if I can help here.If at any time you feel that I cannot help with this please let me know.
I see no one has replied with any help/info on this here.In some cases this can be due to the info being difficult to obtain or the correct person that may have this info may not be online.In some cases you can obtain the info you need here from a repair facility or dealer repair facility that works on this model here.In some cases another injector or two may be at fault as well here and the number 3 was masking the others.I would have the rest of the fuel injectors tested/checked to see if any more are found to be at fault needing replaced here.If these are or were checked and found to be o.k. let me know so we can continue.
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Hi Paul, My name is***** see you are having trouble troubleshooting this Isuzu engine. I wanted to chime in and offer you some operational, troubleshooting, and technical information that will help you and your mechanic. Click on this link to access the troubleshooting info.
I just thought about your scenario you have going... If you have fuel pressure on standby in the rail, no leaks but fuel will not inject for starting check that the cam/engine speed sensor is signalling the ECM for engine RPM or injection will not be enabled. I highly doubt all injectors are bad and would not go there. This now seems electrical.
2007i–2010 engines will not
start if the CMP signal is lost
Check both crank and cam sensors and signals
The fuel pressure sensor is a possibility as well and no the cam and crank sensor will not always throw a code.
Also an ECM software problem could be a potential problem.... I know obtaining a test ECM would likely be difficult but maybe the dealer can reflash and bench test the existing one to eliminate a potential ECM issue.
Thanks for the update. I would call and ask if they can do it without the vehicle and on the bench. Some dealers might be set up to do it.