0302 Help

[jbea0064]

so last night i ran the electrical tests as suggested and checked all grounds per the maual etc. still no resolution. i decided to leave the battery disconnected overnight. when i started this morning i could tell a differnce, that it was running better. i drove a few miles and everyting was fine. i came home and checked with the noid light and there was pulse. i told my wife to drive it a few places today close to the house. she drove for a bit and all seemed fine. she turned car off and stopped for a while. when she went to restart it was a rough start and soon enough the ses light came back on (after about 12-13 miles total) took it for a read and of course same 0302 and noid light no longer working. is this pointing at the ground as suggested above? though when tested it appeared the same as the #4 when compared in every way. the more i do, the more confused i become!

[eieio]

just a thought - are your battery, cables, and cable clamps in nothing less than excellent shape?

[jbea0064]

yeah, those look good. everything electrical checks out including the ground. i swapped the injector connectors for #2 and #4 and the injector in #2 worked fine. the code did chase the connector to #4 when swapped with the #2 connector. is this telling me it is the ecm?

[smj999smj]

If you tested the wire between the injector and the ECM and it was good, it sounds like the driver inside the ECMis intermittently failing, meaning a faulty ECM.

[jbea0064]

that is what i was thinking. i appreciate all of the info you provided.

[jbea0064]

anyone have a good outlet on the ecm? the range is pricing is crazy, just want to make sure i get a quality piece at a fair price.

[smj999smj]

For new, Nissan parts, I use 1stAAANissanParts.com. For used parts, try Car-part.com. Another option is to send your original unit out for repair; for that, I would contact the folks at http://circuitboardmedics.com/nissan/

[jbea0064]

does the part # have to match exactly to fit? the one in my vehicle reads 7 z MEC80-470 B1 5Y10. the used replacement i ordered is identical, with the exception of the last 4 digits. am i going to have any problems here?