Join Date: Nov 2007
Location: Summerland, B.C. Canada eh
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When it runs and I have the scanner, I can watch Hpop pressure (575 at idle). Can you tell me the difference. Now, is this the ICP or IPR value that I am reading? Also, I have been tring to not load up too much info at a time, but I will list in point form what I have found so far:
-Ford dealer retrieved P1661, I have retrieved p1661 once (the last time), P0237, P0238 (turbo boost too high, and too low), can't remember P# but had injection pressure higher or lower than desired, had intermittent cam sensor once. In other words, nothing consistent.
-After first CPS change, discovered small leak from brake pressure switch. Fluid had run down wires into PCM plug. Have thoroughly cleaned and checked plug and PCM.
-Found leaky fuel filter vacuum switch - replaced.
-Cylinder contribution test - failed #4 & 8. Changed out injectors for a pair of used to see if this would resolve. No change - still failed 4 & 8.
-Have hesitation between 2000 and 3000 RPM when I stomp on the pedal. When truck is running good, this hesitation is minimal. When it starts to act up, the hesitation is noticable again.
-Tested IAT sensor according to AllData.com. Voltage from sensor seems to be working properly. Actual temp reading on scanner toggles from -40F to 473F at exactly the same voltage reading. This is the min/max setting for IAT sensor. No temp values in between these.
-Tested MAP sensor according to AllData.com for P0237, P0238. KOEO frequency is at 106Hz. AllData says below 125Hz replace PCM, and above 125Hz, replace MAP sensor.
-Probably forgot some stuff, but this is a long post.
Thanks for the response, I appreciate it.