Engine/Transmission (1998.5 - 2002) New LP and blue smoke

[NPloysa]

New LP is in. But I have a problem with blue smoke and stumbling at higher RPMs.



This happened with the LP I just replaced, a week or two before I replaced it. Stumbling problem is still there. I can't pinpoint it.



My LP was not getting a good connection in the harness to the ECM so I wired it direct to the battery and to a flip switch. It's a bit tricky to start because I can overpressurize it on crankup, but all is good.



I also don't have a fuel pressure guage in the cab (soon, I promise) but I have a 0-30 guage on the post-filtering side of the filter. It is showing 16 psi idle, which is good.



I know that the stumbling/blue smoke puff happens with my FMS on and off. This is the only fueling mod I have. Turn off the FMS and it's stock (I know, boring). I also know that the blue smoke/stumbling does not happen everytime I go to WOT. It only happens on occasion and I can't see a pattern to it.



Could this be due to pulling fuel pressure down, a bad VP, or what? If it stumbled without the smoke, I would say there is an air leak. But what the heck is causing both smoke and stumble?



I'm getting a little tired of all this!



Nick

 

[johncameron]

Get your codes checked. Prey for no code 216! sounds like it. Start saving your pennies.

 

[NPloysa]

That's what I am thinking after reading a bunch of past threads.



I can't check my codes myself, unfortunately, due to the model year and no ability to do that. So, guess I am going to the auto store at lunch tomorrow to check it!



Nick