Engine/Transmission (1998.5 - 2002) bad smoke and low mpg ARRGHH!!!!!!

[rivercat]

I have this heavy almost comp box looking cloud all the time. Stock sept a power puck timing box so far. .



First noticed it after a couple of tanks of exxon, Yeah I knew better.



cleaned the IAT first no help



crawled under and felt up all the boots no leak far as I can tell



reset the apps a couple of times no help



Ran countless tanks of good fuel with good attitive standyne, amsoil fuel power no help



Acording to my scanner intace air temp stays bettween 120- 100 while underway in nomal conditions seems like it is working.



boost shoots up to 21-22 and then defuels like nomal so the MAP must work



No codes not sure about fuel press but it must be good for all the smoke.



Am I missing any thing ? ARRRGH





puck never smoked before sept maybe a little puff in bettween gears and now it puffs all the time



ripping my hair out...





EDIT oh almost forgot two fuel filters and no change

air filter stays clean

 

[NWhitney]

I would assume that you have checked the air filter but if you have not, do that next. What does the truck do with the puck off?

 

[nps]

Rivercat,



I've got the same problem - but comes and goes - sometimes no smoke, others alot - with an EZ and HO motor. MPG is not good or bad - 17 in town and 13. 5 pulling a 10K trailer. No real unloaded HW readings.



I've looked hard at the IAT - even wired in a pot to vary the air temp as high as 160 degrees on the fly - should have really caused a defuel but had no effect. Also looked at the MAP, boost leaks, and everything.



I'm leaning toward a bad injector? Going to swap for some RVs and see if it clears up. Will be watching to see what you determine is your problem.

 

[rivercat]

rv are ok but I would spend the money and go with dons 1. 5s or 1. 6s even better at 5 hp and 50 less egts



Im leaning towrds big mach 4s and a b1 but might stay conservative and go with the 1. 6s and catcher for low end could I have a flappy wastegate problem



boost a WOT only hits 20 at say 2100 at the earliest



havn't tryed with the puck off bout can't stand that

 

[nps]

rv are ok but I would spend the money and go with dons 1. 5s or 1. 6s even better at 5 hp and 50 less egts

Agreed but I want to see if the smoke gets worse or better before deciding to spend more money.

 

[Graphic man]

did you check the wastegate?

on a 02 you must have a hy35

a wastegate sticking open would cause the smoke and bad MPG



just a though



Scott

 

[Huff N Puff]

Need more info.

EGTs would be a valuable piece of info. in trouble shooting this issue. are you reading the boost on the scan tool,or a pressure guage. Do both see if the readings match.

 

[rivercat]

both

but the scan tool is in %HG what is that goes from around 40 to 68 at full boost

is there a conversion to psi?



Gman

I thought hys were only on autos and mine is a 6speed with a elbow not a turnbuckle







H and P

at what times do you want to know the egt and I will go do it and write it down to post