Nissan Repair Questions? Ask a Mechanic for Answers ASAP
Hey there, thanks for the question. My name is Jake.
What happened that required an engine replacement at 8000 miles? Was it flood damaged?
The engine will start normally, but only run for a few seconds then die?
nothing odd happens at that time like the NATS light coming on?
if your watching the fuel pump duty or voltage on your scanner does it go away even when using starting fluid to keep it running? or are you losing the injector pulse?
because if your losing pump operation it could be from the crank or cam sensors if one of the plugs is not fully seated. Also the crank sensor would be the most susceptible to water damage.
aside from them and anything obvious like a fuel pump failure, the only other 2 things that would cause the pump to cut off are the IPDM or ECM and aside form a bad connection at either one it would be highly unlikely that they got damaged because of their locations.
If it was me, at this point I would check the IPDM and ECM connections again. Make sure the lock connector is fully latched on the ECm as it's fairly common to see people not fully cylce them. Aside form that I would check my crank and cam sensor connectors one more time since the engine was replaced.
Not if you had a poor connection on one them unless the condensor fan came on or a U1)00 popped up.
Yea, that's weird that it continued running that long 1 time.
Give those items a quick look over and let me know real quick.
I assume that when removed the air-box or replaced the MAF that you made sure the resonator in intake tube had no water in it or anything from the previous water intake?
The IPDM has limited capabilities from a scan tool. Most of the testing is is meter testing. You can see relay status an inputs though, you can see the fuel pump relay status.