Dusty033 Posted May 14, 2021 Share Posted May 14, 2021 06 6.0 cylinder 6 miss relative compression is good check circuits and between pins 4 and 3 at injector connector harness side i have 1.2 ohms, check the circuits between FICM and the injector connector all good, check at at pins 7 and 22 on FICM i have th2e 1.2 OHMS. Never seen a FICM just drop one injector but i'm a late diesel guy 6.7's, not well versed in the 6.0 or 6.4 but the old diesel guy is on vacation so i cant ask him ? any help would be appreciated. Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted May 15, 2021 Share Posted May 15, 2021 What code(s) are you diagnosing? The circuit codes and the contribution codes ALL take you to PPT P which it looks like you are performing. Your injector resistance is in spec, did you perform the tests for shorts in the same circuits? Does it pass a Buzz Test? If this is just a P0306 i might lean toward an injector, if this is a circuit code then the FICM is suspect. Where did your testing lead you? I know, I have more questions than answers but this is usually pretty simple. This is where having a known good test FICM comes in handy to try before committing to a repair. Quote Link to comment Share on other sites More sharing options...
forddieseldoctor Posted May 16, 2021 Share Posted May 16, 2021 Yeah what Keith said. If you have injector ckt codes it’s probably a ficm since all your ckts ohm out. If it’s just a contribution code then at this point it’s probably an injector. I recommend testing fuel pressure any time you replace an injector on a 6.0 since poor fuel pressure will eat injectors. Quote Link to comment Share on other sites More sharing options...
lmorris Posted May 17, 2021 Share Posted May 17, 2021 When I get these and the PPT leads to a FICM replacement, I will move the connector for the injector stated in the code, to another injector. DO NOT START THE ENGINE. Re-run injector self test. If the code stays the same, it's a bad FICM, provided you have load tested the harness using a bulb. Quote Link to comment Share on other sites More sharing options...
Dusty033 Posted May 19, 2021 Author Share Posted May 19, 2021 it was a FICM. just was beating my head against it doing the ppt multiple times cause with my limited exp. with 6.0. I havent had any that just dropped one injector. 2 Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted May 19, 2021 Share Posted May 19, 2021 NICE! Thanx for updating with the diagnosis and repair verification -that makes every thread more valuable when we do. Quote Link to comment Share on other sites More sharing options...
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