great. more DTC's.
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Member
Joined: Jan 2006
Posts: 73
Likes: 0
From: michigan
great. more DTC's.
all are from KOER 89 f150 302 with A0D 2wd.
12: cannot control RPM during self-test high RPM check.
44: thermactor AIS sys system inoperative right side. (this should be a big DUH since the previous owner took the pump off)
13: cannot control RPM during self test Low RPM check
25: dyn response test knkock sensor not detected
great. now what? i HAD this thing running fine after i swapped out the wires and plugs. it was idling alot better as it always used to idle high as the sky. then i went to check for KOER codes and grabbed the couple in the engine compartment then the truck died. turns out one of the leads in the fuel pump relay corroded and broke off starving the fuel pump of power to run.
i have since replaced that terminal with a new one and it started right up. and the codes above is what i got this time. please note that it now idling where it used to originally, high as the moon.
12: cannot control RPM during self-test high RPM check.
44: thermactor AIS sys system inoperative right side. (this should be a big DUH since the previous owner took the pump off)
13: cannot control RPM during self test Low RPM check
25: dyn response test knkock sensor not detected
great. now what? i HAD this thing running fine after i swapped out the wires and plugs. it was idling alot better as it always used to idle high as the sky. then i went to check for KOER codes and grabbed the couple in the engine compartment then the truck died. turns out one of the leads in the fuel pump relay corroded and broke off starving the fuel pump of power to run.
i have since replaced that terminal with a new one and it started right up. and the codes above is what i got this time. please note that it now idling where it used to originally, high as the moon.
Senior Member
Joined: Oct 2002
Posts: 7,295
Likes: 125
From: St. Louis (Out in the woods)
High idle speed is usually due to a vacuum leak.
The IAC valve is a computer-controlled "vacuum leak".
I'd say your IAC is overdue for cleaning (sometimes helps) or replacement (more likely).
Steve
The IAC valve is a computer-controlled "vacuum leak".
I'd say your IAC is overdue for cleaning (sometimes helps) or replacement (more likely).
Steve