Flyinlo01

Hello everyone, I've recently put a rebuilt 5.3l into my 01Trans Am. Im having running issues, it runs really rich. The first issue I found was coil packs passenger side were wired backwards. Which thru firing off, fixed problem runs lil bit better. Okay back to engine 04 5.3l 241 ported/polished heads. Cam 525/525 110lsa ASA cam. True flat tops pistons .020, block has been gone thru zero decked line bored. Ls6 intake, I'm having issues with map sensor I think it's new but no matter what it reads 80 kpa. I've got HP tuners but nothing I do changes that reading. I live just above sea level about 400 ft. Any information would be helpful

jetech

good info here
Check the MAP sensor ground

Flyinlo01

Thank you for the information. It led me to a broken ground wire. I've ordered a new pigtail, because it broke even with plug in connector. I also ordered a new map sensor to be on safe side. Pulling intake tomorrow,looks like best way to repair wiring.

jetech

You are very welcome. I'm glad you were able to find the issue.