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HELP!! Missfire under accel couple codes
Hey guys need some help here. Truck started missing under accel the other day. Getting worse. Did cylinder cont. test codes p0266, 0269 cylinder 2 and 3. Also did buzz test and had code p1298 internal idm failure. I have the modded idm from dieselsite thats only a couple months old. Could the idm cause the cyl. cont. codes? Will the modded idm throw the code just because it's modded?
1997 F-250 ex cab. Swamps tunes, afe intake, mbrp 4" exhaust, idm mod