Thanks, unfortunately the shop that installed it won't listen to me and connect to the computer to make adjustments or see what the data tables show. I checked the distributor and timing marks today, everything was like I figured dead nuts because no codes. The fuel pressure is good. same MPFI assembly just new injectors on the spider assembly. I ordered new flow matched injectors since the others had about 50K/7yrs on them. I had already upgraded to the mpfi in 2015. The 0411 was running my old engine perfect with some performance tuning for the stock engine prior to installing the new engine a few months later. I have checked every fuse and I've swapped my old sensors out on everything except the crank shaft position sensor to just make sure it's not a faulty sensor of any kind. No change. So I put my new Delphi and ac Delco professional sensors back in.
The shop that installed it wouldn't listen to me when I told them that it had to be tuned properly at start up to run so it didn't run rich or lean voiding the warranty, of course they acted like I didn't know anything. Anyway they told me after installation that they put a stock tune in and I'd have to tune it more when I can afford my headers and new exhaust. Unfortunately due to being on disability that might be a year or 2 from now.
As far as ATK, yeah my faith in their abilities isn't very high either. The morons put the wrong valve covers on the engine. They put pre 96 center bolt covers on a vortec. The baffled holes for the breather and PCV we're upside down backwards,or left cover on right side, and vice versa, if that makes sense. The drivers side PCV had no baffles and the baffled part was in front for the oil filler plug. Needless to say I put a puke can to stop the oil from entering the intake fowling everything out. Only 1,000miles, 8wks, on the engine and the spark plugs are covered in carbon build up from burning rich, see the picture. It was going through half a quart a week. Finally I ordered a factory OEM set of covers to fully resolve that issue. I'm trying to find someone in my area that knows and understands how to fix the fuel maps or whatever it's called in the computer. So far not really having any luck on finding any tuners or shops that know how to adjust that stuff. To me if you have a computer that can reflash and adjust the PCM then any shop with a mechanic that knows how to operate their system would know how to do it.
Maybe I don't understand the process.
It's just frustrating!
I greatly appreciate everyone's input thus far. Those of you experiencing similar issues,I hope y'all can get your Engines sorted out soon as well. If I can ever get it resolved I'll definitely post what the cure is.
