Join Date: Jun 2006
Location: Baltimore, MD
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02 7.3L smoking, no power, no boost but high EGTs
So a few days ago the 7.3 starts sputtering under load, going up hills, etc. Boost is about 17-19lbs typically, and it'll spike up to that amount, but then after a few seconds drop to 13-15. So, trying basics first, I change the fuel filter, but it wasn't really all that bad. The filter bowl looks fairly decent.
Problem only gets worse...sometimes white smoke when I goose the throttle, sometimes black smoke.
For the first 20 mins of driving, it'll be ok, but it'll get worse and worse until eventually I can't make more than 45mph...sputtering becomes pretty intense. Stop and let it cool for a few minutes and I'm back on my way...repeat this process several times. One thing I notice is that even though I'm only making about 5lbs of boost when it's really falling on its face, my EGTs are through the roof...1200-1400* even though I'm not making any power or boost.
I tried cleaning the K+N to make sure I'm not starved for air. Had the local shop pull the codes from the computer, and he said he was getting an ICP code and a bunch of scanner gibberish that made him think there was an aftermarket chip or tuner in the truck (I bought it used but it has Banks diesel stickers all over the truck). His thought was that the Banks chips are junk and I probably just needed to yank the chip.
So today I pulled the PCM out and opened it up...and there's nothing un-stock or aftermarket inside. Nothing that says Banks, and from images I've seen on the net it appears my PCM is bone stock.
Is it possible the PCM was reflashed or something else crazy that damaged it?