1997 Goofy miss issue

dzldoctor · Mar 18, 2013

Have a 1997 F250 that has a miss on #7. Passes idm buzz test. The injector is quiet on #7 during the test, but it passes. Swapped in known good IDM same thing. Load test the wires from the IDM connector to the injector itself all good. Swapped in new injector same deal quiet buzz, but all pass IDM codes. Anyone seen anything goofy like this? Checked compression 400# plus.

ghohouston · Mar 18, 2013

Pull you u.v.c.h. Out of the truck and physically ohm out the plug to #7 injector, of its higher than 3 ohms or so, its bad

dzldoctor · Mar 18, 2013

They were replaced, but I'll check them. Funny it never throws a idm ckt code.

Old OutLaw · Mar 18, 2013

I had a bad UVCH right out of the damn box, would NOT fire the injector.....

JD3020 · Mar 18, 2013

Old OutLaw said:
I had a bad UVCH right out of the damn box, would NOT fire the injector.....

Ford/IH or Dorman/other aftermarket brand?

dzldoctor · Mar 18, 2013

They were done at another shop, so not sure but bet they were NOT OEM. I will double check that, but would that not throw a code for the injector circuit?

Old OutLaw · Mar 18, 2013

it was from IH ....

dzldoctor · Apr 5, 2013

Truck still has the issue. Just got done swapping for oem harness and valve cover gasket. Does not click the injector, but passes buzz test. On that note tried a known good IDM, known good PCM, no change. Looks like injector? Hva eplugged in new injector without bolting in, no good click on that either???? WTH???