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Message: [QUOTE="JHILL, post: 390995, member: 203"] I have a miss ? that has shown up recently after changing oil. Have had an issue all along @ 2300 rpm in a steady state throttle position which I have assumed was a tuning issue. After oil change, at light cruise cut's in and out with no change in pedal position. Under load do not notice and makes good power, starts fine, DC, and peak ICP #'s seem normal ,@ Idle 17% cold, 9-10% warm, 2950psi @ WOT @39% DC. On the scanner I am seeing a 150-200 psi ICP drop when it acts up. Buzz test - all 8 buzzed with 1 sounding slightly weaker, Cylinder Cont. #1 and #8- balance fault. Compression test over the winter was good ,390 psi low with 2 holes that were high 430 and 450( possible oil /fuel seepage causing the high reading's?), the other 5- 400psi or slightly higher IIRC. 345k miles, no excessive blow by,fuel mileage seems normal, not that I check:D ICP sensor is dry. Dirty IPR? I have tried 2 different TPS and recently swapped back to the original ford TPS edit: Delo 400 with 2 bottles of Rev-x previously, Valvoline 15-40 with 1 bottle Rev x on this oil change The Rev x seem's to smooth out the idle nicely. [/QUOTE]

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