Join Date: Aug 2009
Location: Richmond, BC
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Need Advice on DTC P1298
Have a 1994.5 with a slight mis at 1200 rpm or less.
336,000 km (208,000 miles)
No exhaust smoke after 3 or 4 seconds when cold, no smoke when warm.
Starts and drives fine, except the slight mis idling and engaging the clutch from stop.
DTC tab = P1111 System Pass
KOEO tab = P1298 IDM failure
KOER tab = P1298 IDM failure
Injector Buzz = P1298 IDM failure
Contribution Test = P0269 -Cylinder 3 contribution/balance fault
So is the IDM going bad or is the P0269 fooling the PCM into beliving the IDM is bad?
Do i have 2 problems?