2001 7.3L Running BAD - Not on all cylinders.

Codes:
P1670
P1316
P0605
P1274
P1276

Holy schmokes! Any ideas on where to start for him?

a mechanic





I'm such a smartass sometimes...

p1670 ef feedback signal not detected .....p1316 injector circuit (idm codes detected)...............po605 internal control module rom error.......p1274 high to low side open, cyl 4......p1276 high to low side open, cyl 6. It almost looks like he's got something going on with the connector at the idm (behind the driver wheel well). Possibly the connector as well on the driver side valve cover.

I would start at the left valve cover, make sure the connector is cliped, if so pull the valve cover off check the harness under the cover make sure it's locked to the valvecover connector, also make sure it's not melted. Leave the valve cover off, check the bulkhead connector at the left valve cover make sure it didn't chafe any wires. If still nothing, pull left inner fender open at driver door area to access IDM check connector for water, i'd accually remove the idm and shake it making sure nothing is in it. Now if no obvious issue are found i'd replace the valve cover and under cover harness first and try again see how it runs. Also if you like PM me your email address and i'll email you some pinpoint tests if you really wanna get involved....

Dave, thanks. He's gonna start with Vince's ideas in the morning, if that doesn't work, he'll move on to yours, then if no luck, I'll get back to you.

Thanks to Vince and Dave for the quick replies!!

And to Aaron for reminding everyone that this site is for fun too!

BTW Aaron:

Just lemme know if you need anymore info im full of s**t......

d-kuzmen said:

I would start at the left valve cover, make sure the connector is cliped, if so pull the valve cover off check the harness under the cover make sure it's locked to the valvecover connector, also make sure it's not melted. Leave the valve cover off, check the bulkhead connector at the left valve cover make sure it didn't chafe any wires.

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BINGO!! It was loose inside the valve cover. On the outside of the valve cover it has a safety catch to keep from coming unplugged, BUT underneath, it was loose and they plugged it back in, but they said that it seems easy to unplug like there's no safety catch of any kind. Is there supposed to be a catch on the inside plug?

6L PWR said:

BINGO!! It was loose inside the valve cover. On the outside of the valve cover it has a safety catch to keep from coming unplugged, BUT underneath, it was loose and they plugged it back in, but they said that it seems easy to unplug like there's no safety catch of any kind. Is there supposed to be a catch on the inside plug?

Click to expand...

It should stay locked. There probably worn may just want to replace them so it doesn't happen again.

d-kuzmen said:

It should stay locked. There probably worn may just want to replace them so it doesn't happen again.

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Any idea what the part numbers of what he should get are?

the gasket and harness are bery popular replacement. the uvc harness is a 9d930, and then the vc gasket.

6L PWR said:

Any idea what the part numbers of what he should get are?

Click to expand...

f81z 6584 aa is the gskt and f81z 9d930 ab is the harness under the cover.

d-kuzmen said:

f81z 6584 aa is the gskt and f81z 9d930 ab is the harness under the cover.

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Thanks!! Now I have numbers to go by. I couldn't find those parts on the parts sites.