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Just finished pulling my 21ft. Center console to key west and the truck ran great all the way down. As soon as I made it to the house I got a check engine light and the code was P0279. The truck started to lope. I parked and left it til a few hours later. After a bit I cranked up and it was running fine. The next day I cranked up to launch the boat and it was running fine until I got back to the house and it started to lope again. Just cranked up again and it starts fine but runs for 10 secs and then starts to lope. FICM all good volts, battery all good volts. Any way to know if I have a chaffed wire or bad injector? I live in the panhandle of Florida so a long 10+ hour drive home. I need my truck to work. Any help will be greatly appreciated!!!!
Measure the open coil resistance between pin 1 and 2. Then measure close coil between pins 3 and 4. It should be between .4 to .6 ohms with the engine cold.
Here is the engine control and sensor harness in this PDF.
You can use the diagram for the injectors to find what pins
go to where.
This PDF is one of the keep in a safe place ones. Comes in handy
when tracing things.
If you need others let me know and I'll see what I can find.
Literally have same code pop up yesterday. I swapped #5&7 plugs cleared the code and waited till the light came back on. Easy way to check to see if it's the injector or the harness. In my case it's the injector that took a crap.
