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Hi Eric, help me brother! Supercharged 4.0 with progamable 2 bar map tuner used base map and advanced timing 2 degrees for 36 lbs inj all ran great! Till the rain, whenever it rains drives fine till an incline load… at 60+ it heats up from 210 to 225 and out of blue drops out engine rpm loss. For just a second of a grand, then back to normal no code! I’m thinking tps or short in fuel circiut. My guess with no code is its still within tollarace of ecm it does it. At random on hot day! No vac leaks oh other thing leads me to tps is high idle then slowly drops to almost normal 1000 rpm, it’s somthing stupid I’m just missing just cleaned t plate no difference. Fuel gauge drops and has trouble recovering! Stays a lot lower therefore short in pump sensor, but you can feel the trans all drops out then boom back, wonder if speed sensor on trans 32rd auto 3 speed could be culprit! No cash need daily 100 miles commute 200 tj 6 inch lift 35 inch tires 4:10 gears also running old intake off 93 dorman I’m modify to fit headers. Trims are -1.77 +180 a and b banks short term. And 00 long term help me help myself! I work on C32 industrial engines, essential for the state of maryland, work as a lvl 5 tech for maryland environmental services, ever done a road trip? You could talk about diesels tier 3 4 interim and final I’d love to show ya the harshest environment for any engine! Threw a rod in a 3412? 12 twin turbo 1000 hp engine last month! Please
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If I had to guess, I would say a sensor or coil has an internal crack. The coil and sensors such as tps, crank and cam sensors are multiple fine windings embedded in a hard resin encased in a plastic shell. No way to see internal cracks. When it gets warmed up, the crack spreads apart then you have poor performance. When it’s cooled off it shrinks then all the windings are better at performing. Thus makes it very difficult to test the part because after its removed its already cooled off making the crack shrink, so a multimeter test makes it look good. Then the part gets reinstalled and acts up after its warm again. Thus can cause no codes to show afterward as well. It’s frustrating but very possible. Good luck.
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