Code problem solved.

[mcgoo422000]

Posted the other day about a code problem I's having on a 99 7.3.
Had a long term cold miss that dissappeared when warm.
replaced four injectors 2,3,5 and 8. After installation buzz tested injectors
and kept getting 1272,73,75 and 78 codes. How could I have four injector codes and truck was running great? I had someone else scan it they got same codes, they saiad wiring or IDM was going bad? (Yeah right).
I rechecked injectors and UVCH externally using a adapter I made, all checked good. I did several hours of inline reading and found there's a sequence you have to use sometimes when codes won't clear out of the IDM.
I performed the reset sequence and NO more codes buzz test passed.
I have read lots of post online and this seems to be a problem. Most have wound up buying harness's and IDM needlessly. If it runs good don't always believe the buzz test.

[jesilvas]

So what was the sequence? Not much help if we don't have it.
Only "reset" I know of if D/C the batts, drain all the power from the system, and start over.

[mcgoo422000]

Originally Posted by jesilvas

So what was the sequence? Not much help if we don't have it.
Only "reset" I know of if D/C the batts, drain all the power from the system, and start over.

Depends on if your using a ford or aftermarket scan tool. I have a MAC scan tool

Aftermarket Scan Tools

Aftermarket scan tools may exhibit the same issue as the Ford IDS software described above. In this case it is recommended to Clear DTCs then re-run the self test to determine if DTCs are present. If DTCs appear to be persistent it may be necessary to remove the scan tool, reinstall and recheck for DTCs by re-running the self-test.

» Ford 7.3L Power Stroke

[jesilvas]

So just clear the codes and see if they're still there?
Thought it was some special reset type sequence.

Same thing can be done by removing power from the PCM and resetting it that way.

[mcgoo422000]

Originally Posted by jesilvas

So just clear the codes and see if they're still there?
Thought it was some special reset type sequence.

Same thing can be done by removing power from the PCM and resetting it that way.

Sure won't disconnected batteries for over an hour and the codes were still there when I did a buzz test. Ther's a difference in self-diagnostics and readinfg codes. The IDM stores them or does something totaly different, don't ask me what, I don't know. I know for two days I kept getting buzz test codes on new injectors. When I did buzz test and disconnected the scanner and then clered and retested the codes were gone. If you'll read the link I posted you will see it states persistant codes after injector replacement. I had mone tested witha mac scanner and a ford pc type scanner both had buzz codes. And notehr machine would clear them until I did procedure in link.