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JGtheBae · 08-11-2020, 09:14 PM

So the 302F / 150C is a short to ground according to the service manual. After inspecting the wiring harness, there are no breaks. I am going to patch in a cable from the start of the ECM connector to the MAF connector (IAT wire). If this works, I will replace the harness, and if not I plan to replace the ECM.

Has anyone had an ECM that became unstable with heat? The only doubt I have with replacing the harness is that it only occurs when the car is hot.

08-11-2020, 09:14 PM	#2
JGtheBae Drives: '07 Vette Z51 \| '13 Ford F350 6.7 Join Date: Mar 2019 Location: FL Posts: 6	Update So the 302F / 150C is a short to ground according to the service manual. After inspecting the wiring harness, there are no breaks. I am going to patch in a cable from the start of the ECM connector to the MAF connector (IAT wire). If this works, I will replace the harness, and if not I plan to replace the ECM. Has anyone had an ECM that became unstable with heat? The only doubt I have with replacing the harness is that it only occurs when the car is hot.