deloxx
NAXJA Forum User
- Location
- Massachusetts
Hello,
On my 98 4.0 I developed a misfire on cylinder 1, which gave the p0301 code as well as confirmed by pulling the injector connector on cyl1 to no change in engine idle.
I have confirmed good spark on cyl 1 by grounding the plug out of the cylinder, good spark.
I have swapped injectors #1 and #2, cleared the codes, and the misfire remains with cylinder #1.
I have 120psi compression in cyl #1.
I have 13.5v at idle at one of the injector wire leads. I am under the impression that the other lead is fed a momentary ground in order to fire the injector. I am unsure of what type of tool I need to test this rapid grounding, as my multimeter does not display this quickly enough.
Further, is there anything I should check at the PCM?
thanks for any help or guidance.
On my 98 4.0 I developed a misfire on cylinder 1, which gave the p0301 code as well as confirmed by pulling the injector connector on cyl1 to no change in engine idle.
I have confirmed good spark on cyl 1 by grounding the plug out of the cylinder, good spark.
I have swapped injectors #1 and #2, cleared the codes, and the misfire remains with cylinder #1.
I have 120psi compression in cyl #1.
I have 13.5v at idle at one of the injector wire leads. I am under the impression that the other lead is fed a momentary ground in order to fire the injector. I am unsure of what type of tool I need to test this rapid grounding, as my multimeter does not display this quickly enough.
Further, is there anything I should check at the PCM?
thanks for any help or guidance.