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I know this is an old post, but I came across it and noticed there was no solution posted. I had this same problem today and found my ecu relay soaked with thick muddy looking water which came from my cowl panel and ran down the wiring coming through the firewall to relay. I replaced and works...

I do now have a working check engine light with the new computer, also this wiring issue causes my IAC not to work sometimes. I have checked the circuit with no luck. Apparently it is working properly when I check it.

Ok, I will leave the 195 in there, and I do have a 3 core radiator. So what are your thoughts on my ACT sensor. Where should I start troubleshooting?

Ok, I have swapped my computer for a know good computer, what ever my wiring problem is, has toasted a handful of air charge temp sensors. Does anyone know what could cause this. My engine bay seems to be a lot hotter than normal only after underdrive pully install. I am going to resort back to...

yes, the trace looks identical to this one, only its on the #17 pin on ecm. Could this cause issues even if multimeter shows 0.o4 during resistance check?

I am not using the check engine light to dump codes as it will not flash codes on the instrument panel anymore. It does however come on momentarily when the key is turned to the on position. I am using a test light to get codes at this time due to both of my code readers having been fried...

Hi fellow stang lovers, Im new to this whole forum thing and trying my best to navigate through site. Hope in in the correct area for my issue. So I've been having some nightmarish issues with my wiring for a few weeks now and I'm counting more grey hairs on my head every day trying to figure...