+18 SFT on #2

[DEEZUZ]

Truck came in, #2 contribution. Injector did not buzz. Replaced injector. Now buzzed but ran worse. Installed another injector, ran the same. Did a compression check, 430 PSI. Found faulty rockers, pushrods, bridges and lifters. Installed all new, now #2 is back to +18 on the short fuel trim.

the only thing I can think of is the cylinder is washed down and or the rings. but when I had the heads off, it looked fine, crosshatches were great...

any suggestions?

 

[fbilly420]

Did you clear KAM?

 

[DEEZUZ]

not kam, but adaptive tables, yes

 

[suprdzlduty]

maybe the injector harness? had one of those rub through before...

 

[mortal798]

Cylinder leakage test results?

fat-fingered from my EPIC 4G

 

[SootRoller]

DTC? Base fp? I have seen a lot of injector harness issues. If no dtcs after a complete drive cycle, relative compression checks out and base pressure is fine, put some pm-22 in it with a bottle of lubricity additive. Re run your koeo eec, clear dtcs regardless if there aren't any. Reset your tables and KAM. Then go beat the hell out of it. I have seen quite a bit of terminal fretting at the harness to injector connector if the disconnect tool wasn't used properly or just not used at all.

 

[DEEZUZ]

DTC for cylinder contribution only comes up after Koer. I guess I will try a harness next. Thanks

 

[DEEZUZ]

2 BAD brand NEW injectors....Tossed in another one, works fine....


**** these motors... not just cause that issue, just working on them in general...

 

[tensixniner]

2 BAD brand NEW injectors....Tossed in another one, works fine....


**** these motors... not just cause that issue, just working on them in general...

New injectors were from Ford or eBay specials.

 

[DEEZUZ]

unknowns

 

[Big Angry Hillbilly]

Put 6 sticks in a Mack last month, 2 junk right outta the box.