I have a 00' with 110,000 on a strong and slightly modified 318 magnum. I installed an aftermarket ATI Procharger about 7 months ago W/ 11# of intercooled boost. For the past 2 months I have had the scanner on the truck testing almost everything. I can't find anyone with an accurate diagnosis to help me or lead me down the right path with my truck. I'm getting a P0108 map sensor code on and off (But I don't know if this is a false code caused but another underling problem). I replaced the sensor and ran the test in all data & Mitchell online and it passes, actually the old map sensor passed too but I changed it anyway just to eliminate the doubt. Intermittently but more frequently these days, the truck stumbles lightly once at exactly 2100rpm and at exactly at 3000rpm it bucks hard, chugs, and eventually falls flat on its face if I floor it. The severity of the symptoms depends on how deep into the pedal I am, (Light throttle =Light bucking)(WOT = Heavy bucking, back firing, and eventually complete power drop out).
It kicks down and gets better if I let up all the way and then floor it right after it starts to buck at 3000rpm. The other night I disconnected the blower to see if it had the same bucking, and not once did it buck or give me a code. I really hammered the "S*^$" out of it, so it has to be something to do with the blower. I called the so called techs for the 10th time now at ATI, basically they told me that they help me all that they could and it's my problem now. I checked what they asked of me and reported the findings.
I use to be a Tech till I ran into this problem, I ran all the basics and many advances tests and I remember most of the data I recorded. Readings from Snap-On Mt2500 & Fluke 88 & OTC Genesis and other gauges.
HELP! Thanks for any help at all.
have the same problem?
Thursday, November 8th, 2007 AT 7:15 PM