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Message: [QUOTE="TARM, post: 668873, member: 578"] The one thing that is what really made me understand just how bad the change in design was: The CPS new or old are all very close to the same OAL from tip to where it mates to the front cover. So we call than equal. But now all the narrow tips ones I have send have about full 0.25" of plastic on the tip before you get to the actual hall sensor ( what I call magnet above, sorry was trying to make it simple) Now the spec for proper shimming off set of a senors according to ford IIRC is 0.25"-0.30". This is suppose to be from the tip of the CPS to the gear. Well that is based off a sensor ( the original) that has almost no plastic covering the sensor. Its so thin you can see the impression of the hall sensor doughnut in the plastic if you tilt it in the light(ghost image). So I will call this basically zero as well. That means that for these CPS with the narrowed ends to have an actual off set of 0.25" they would actually have to be physically touching the cam gear with the plastic end. As most people are not going to spend $$290-$325 for the CPS micrometer jig we just put them in without any shimming at all. So they just hope its good but this can certainly be the reason you see variations in why some engine seem OK with greys and others do not. It very well may be those ones that are OK they are just barely no hitting the gear. The other thing is the offset. A number of the sensors with narrow tips cut open relieved the hall sensor was up to 1/8" off set. Someone worked that out and IIRC could work out to as much as 2.4 degrees of offset in time. That would certainly have an effect I would think. So with variations in engines from wear and tolerances and the same in these narrow tip sensors it no wonder things are all over the place. These things are the pace maker of the engine. With it accurate info from the CPS nothing from fueling to RPM and piston position is being computed accurately. Well anyways that my opinion on it. the wiper issue some have had seems to be from interference electric trash the wiper motor is needing out. Ford even did a TPS on it. It uses the same ground. Cut the ground from the Wiper and rewire and ground it somewhere else. I would think that would fix the issue. Totally butchered this thread, sorry NWPAStroker. My apologies, I am done side tracking. [/QUOTE]