jmullins91
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| Posted: Feb 20 2013 at 7:25pm | IP Logged
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I have a 2004 Frontier XE with 4cyl, automatic. Yesterday while driving vehicle started missing. I drove to destination, vehicle set approximatley 30 minutes, got back into vehicle and after short distance it started missing again. First thought was a fouled spark plug. Once I began driving up a mountain pass the "service engine soon" lighted started flashing, I pulled over and it briefly stopped flashing and went away. When I attempted to engage from park to drive the vehilce died and wouldn't start. It acted like it wasn't getting a spark. Had vehicle towed to repair shop, after approximately 2 hours of diagnostics mechanic determined two things, first the injector fuse was blown and second the cyl 4 injector wasn't receiving a ground signal. Mechanic traced circuit back to the ecm and it was sending a signal for ground, however the injector wasn't responding. Bad injector or faulty ecm? Help would be appreciated. 
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frontierguy
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| Posted: Feb 21 2013 at 6:02pm | IP Logged
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It seems like there was a concern with the harness chafing
against the bracket on the valve cover towards the right
rear. With a blown fuse, I would be looking for a short to
ground. If the ECU ground signal is OK, I would think the
ECU is OK. A check of the harness for continuity is needed
to determine the source of the concern. Did he try swapping
another injector to isolate the concern?
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'10 Altima SL
Traded 08 Frontier for 16 Frontier SV CC Long box, quite an upgrade. I do miss the 6 speed and Dynomax ex.
Nissan Technician 25 + years
2011 John Deere X720SE
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Nissan Frontier Forums : Problems / Technical
Topic: Fuel Injector Not Grounding
