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Message: [QUOTE="Black 02, post: 1333898, member: 6916"] I had an OBS ICP sensor and it immediately threw a check engine light and didn't seem to work. I know they are expensive, but I'm gonna order a new one I think. I'm also gonna change the wiring plugs for the IPR, the ICP, and maybe the cam sensor. I'm gonna change the UVC gaskets and wiring too. I've talked to a couple people and they said all of that can't hurt. The IPR is Ford and literally has maybe 200 miles on it. It's expensive, but it's the only way to eliminate these electrical gremlins. I spoke with Dave at Swamp's and after listening to my video, he thought it sounded less like a "miss" and more of what he calls "trailer hitching". The truck doesn't seem to miss at idle and it seems to miss less when the engine is cold. When the operating temp reaches normal, it seems like the miss starts occurring. It does hiccup a little when cold though. Just gets more pronounced when warm. In park, if I rev the truck up to 2500 RPM or so, it will throw a P1211 code every time. I haven't data logged the ICP while doing this yet. I can. The truck cranks normal on startup, but it is smokey. When warm it's clear. If I plug the truck in, it has very little if any haze. I've wiggled all of the plugs on the engine and it doesn't make any difference. I unplugged the ICP sensor and drove it and it still does it. The "miss" doesn't seem as aggressive when the ICP sensor is unhooked. I removed the Hydra and drove it and it still does it. That's all I can think of. Dave thought maybe one of my injector poppets wasn't working correctly allowing a bleed off until it snaps shut and seals. When the ICP spikes, I can hear for the lack of a better term a "clatter" in the engine. I'm guessing it's the injectors making noise. When the ICP is jumping around, that clatter stops and starts like a switch. You can hear it in the video of mine if you listen closely. [/QUOTE]