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2011-2014 Mustangs
Power-Adders
PCM Flashing with FI
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<blockquote data-quote="wildman926" data-source="post: 15670544" data-attributes="member: 94906"><p>Thanks for the response basspro. </p><p></p><p>Yes, I installed the TVS per the instructions from VPM (not very good BTW).</p><p></p><p>Multimeters are absolutely the best used for throubleshooting wiring issues. I have used them for 30 years working on various equipment. As I said in my previous post, I did measure for continuity which shows there is a clear path in the circuit between pins. I also measured the IAT2 sensor resistance when the engine was at room temp, and at operating temp, and the resistance was within spec for both temps according to a Ford Service Manual. I also measured the same resistance at the end of the cowl connector that plugs into the pcm using both pins 56 (5v ref) and 36 (iat2 input). I have checked to ensure I have the correct pins multiple times. The pins are also locked into the cable connector, and I have also ensured that they are seating by squeezing them closed slightly, plugging cable in, remove cable, and then inspect those pins. They are back to being opened up, and a tad shiny on the inside from the contact made. </p><p></p><p>I have worked with a well known tuner (not VMP, totally useless with this problem) and he verified my troubleshooting, and also believes it is the pcm. </p><p></p><p>I have a new pcm and the car is scheduled to go to the shop this Friday 8/11.</p></blockquote><p></p>
[QUOTE="wildman926, post: 15670544, member: 94906"] Thanks for the response basspro. Yes, I installed the TVS per the instructions from VPM (not very good BTW). Multimeters are absolutely the best used for throubleshooting wiring issues. I have used them for 30 years working on various equipment. As I said in my previous post, I did measure for continuity which shows there is a clear path in the circuit between pins. I also measured the IAT2 sensor resistance when the engine was at room temp, and at operating temp, and the resistance was within spec for both temps according to a Ford Service Manual. I also measured the same resistance at the end of the cowl connector that plugs into the pcm using both pins 56 (5v ref) and 36 (iat2 input). I have checked to ensure I have the correct pins multiple times. The pins are also locked into the cable connector, and I have also ensured that they are seating by squeezing them closed slightly, plugging cable in, remove cable, and then inspect those pins. They are back to being opened up, and a tad shiny on the inside from the contact made. I have worked with a well known tuner (not VMP, totally useless with this problem) and he verified my troubleshooting, and also believes it is the pcm. I have a new pcm and the car is scheduled to go to the shop this Friday 8/11. [/QUOTE]
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