argh I just can't let this issue die! So this morning I did my usual go let the pickup warm up for a few mins before I leave the house. I came back out and it was smoking out the neighborhood for mosquitos. I mean it was billowing grey smoke out. I thought maybe she just needing a good floggin and some diesel jammed in the tank so I flogged it all the way to town and added 9 gallons of #2. I figure at this point it's got to be nearly all diesel in the tank with remnants of maybe 3-4 gallons of WMO blend. When I got to work it was billowing smoke so bad I was really worried about a cop driving by giving me a ticket! And even after 5 minutes of idle time, EGT's would not drop below 400.
Fast fwd to this evening. I had to drive to a neighboring city and cruised on the hwy @ 70 mph on flat ground, and was running 1000 degrees EGT the whole way, which is abnormally high for me (ambient temp was maybe 50 degrees?) and 7psi, which is higher than my normal cruising boost levels. No change.....at idle it idled like crap, and every time I let off the throttle at higher speeds I'd make a big puff of grey'ish white smoke, then another puff when I put my foot back in the throttle (lightly) Also if I kick Overdrive off to use engine compression to slow down it billows this same grey smoke out the exhaust.......
I went and bought a bottle of Diesel Kleen and poured the entire bottle in (treats 100 gallons-added it to my front fuel tank which was full) then got out on I-25 and decided to flog it hard at 80+ mph constant speed. EGTs and boost seemed more normal, 11-12psi and 1000 degrees. After a few miles at this speed I started to notice slight surging. A few miles later the surges were so noticeable I could literally watch my boost gauge go from 12psi-14psi in a pulsating way (not like turbo surge or flutter)
When I got home I let her cool down in the driveway, idle seemed a little more steady, but within 30 seconds of being stationary the darn smoke started billowing out again. I again went over to the exhaust to get another good whiff and it's definetely NOT cooolant, it's a nasty pungent smell (not sweet at all) thats clearly oil, so much to the point it made my eyes burn.
Towcat suggested on the phone that it sounded like an IP going bad, and I'm really leaning that way. (which sucks because it's only got maybe 14k miles on it) I'm kind of scratching my head though, because the last pump I had crap out (when I bought this pickup it had the original pump on it with 200k miles on it) it had NO power and just blew BLACK smoke everywhere all the time. This pump, conversly almost feels like the power has INCREASED recently, and doesn't throw black smoke, just this stupid Grey smoke at idle or off throttle.
The surging issue I thought could be a bad fuel pump (low pressure and volume) but it seems awful coincidental that would be the case, considering I don't think a bad lift pump could cause grey smoke. I'm not burning motor oil (checked and levels are same) which also rules out a turbo seal gone bad.
So I come back to Injectors or IP. Thoughts everyone? I"m befuddled here....... Could it be the cold idle advance slightly staying on?
