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Message: [QUOTE="TARM, post: 1036583, member: 578"] No the IH ones are crap as well. They are all the same thing. Some testing was done and it shows an up to 4 or 6 degree of timing (SOI) change switching between CPS. Do some checking for yourself on the two CPS I mention. TDS and F-T You can get them from advanced auto but they do cost more like the old ones used to before the recall. At least then you know you are getting a good reading and timing etc. I doubt that is all your issue. As its come on gradually it could be a few things combined from wear and age. Try going thru those things listed and lets see what you get. The stumble with the tune on could be the chip itself. Make sure you tape it in but do not use to much tension as you can side load it and actually cause connection issues. Just snug to hold it in place. Many times that stumble die is a sign of the CPS if everything else is OK. Unplugging the ICP and visual inspection will at least give a basic function test that its working at all. The idle should change when you unplug it and it will start to cycle up and down over a few minutes or so. If their is no differnce when you unplug it then the ICP needs to be swapped out and get it from Ford. [/QUOTE]

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