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Mach 1
03 mach 1 chasing idle surge gremlins...
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<blockquote data-quote="my04mach" data-source="post: 15913016" data-attributes="member: 166988"><p>I’m interested to see what you find. I had some issues with a slow or struggling ignition that happened 75% of the time (no rapid VROOM with ignition). Also, I had occasional idle issues similar to what you experienced. I went through and checked and replaced my spark plugs. My COP’s seemed fine. No misses or shark bite type issues, so continued with my usual routine (dab of dielectric grease in COP boot). I’ve read before where they say you can’t clean the IAC, but o did anyway. I ended up buy a new Motorcraft IAC from RockAuto. The symptoms didn’t get better and in fact seemed worse. I believe it was a bad IAC. </p><p></p><p>Anyway, I swapped the original back in. I took off my JLT cold air kit and put the stock one back on and all my symptoms cleared up. Maybe my JLT kit was a bit leaky. I had checked for leaks while troubleshooting after swapping in new plugs, but it seemed fine. It was really surprising that the Motorcraft IAC was bad, so watch out if you need to buy one. </p><p></p><p></p><p>IG: @ab_mach1</p></blockquote><p></p>
[QUOTE="my04mach, post: 15913016, member: 166988"] I’m interested to see what you find. I had some issues with a slow or struggling ignition that happened 75% of the time (no rapid VROOM with ignition). Also, I had occasional idle issues similar to what you experienced. I went through and checked and replaced my spark plugs. My COP’s seemed fine. No misses or shark bite type issues, so continued with my usual routine (dab of dielectric grease in COP boot). I’ve read before where they say you can’t clean the IAC, but o did anyway. I ended up buy a new Motorcraft IAC from RockAuto. The symptoms didn’t get better and in fact seemed worse. I believe it was a bad IAC. Anyway, I swapped the original back in. I took off my JLT cold air kit and put the stock one back on and all my symptoms cleared up. Maybe my JLT kit was a bit leaky. I had checked for leaks while troubleshooting after swapping in new plugs, but it seemed fine. It was really surprising that the Motorcraft IAC was bad, so watch out if you need to buy one. IG: @ab_mach1 [/QUOTE]
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03 mach 1 chasing idle surge gremlins...
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