Keith Browning Posted June 15, 2007 Share Posted June 15, 2007 I would like some opinions... Its a 2003 F350 6.0L that came in with a lack of power, smoking (black) and stalling. The tech says it ran very poorly, had only two cylinder contribution codes and found #4 and #8 missing. He replaced those injectors and road tested the truck, still smokes but runs well off idle, too well in fact, almost like it is chipped! The idle is around 950 though and seems jittery and rough but not missing. Smooths out in gear but remains high. The miss is completely gone... Now I have it and I brought it in late so no serious testing done yet, passes KOEO, KOER and no DCTs in memory. So I am looking at the PID monitor (see attached file) and discovered several strange things: The screen shot is with the truck hot, at idle in park and nothing commanded. Notice the IPR showing high and the FUEL_PW low as compared to the expected values in the manual. ICP matches ICP_DES but RPM does not match RPM_DES. I can control ICP and stall the truck, but, if I attempt to command the RPM DOWN, it goes UP and stays there. This reminds me of a truck I had with a sticking IPR but I can control this one... biased ICP maybe??? Shows good KOEO! Confused? So am I! /forums/images/%%GRAEMLIN_URL%%/banghead.gif Guess who I am contacting? Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted June 16, 2007 Author Share Posted June 16, 2007 For those who are interested, apparently I had a biased ICP sensor. It showed good KOEO but it was the cause of the over fueling. Duh! I have just never seen a high idle concern on a Power Stroke. Now I know. Quote Link to comment Share on other sites More sharing options...
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