msydow

mods on the car are circle d 3600, lt/ory, lid. my buddy wanted to do heads and cam already and has not had the car tuned since we put the headers on. the car has run fine for the last few months. i swapped the pcv valve and tried my stock MAF and IAC motor. when the car does idle the LT fuel trim will eventually go to -10 and it starts running rough. the MAF, TPS, MAP, and O2 sensors have changing values as the car is running. i sprayed carb cleaner around the engine with no changes and the fuel pressure is good and holds after the car is shut off. is this something can could be fixed with a tune, and why would it just randomly start this after the car has been run? the plugs and wires are new. i posted in the maintenance section and im leaning towards a pcm/tune problem. runs similar to my 02 when the pcm went out. thanks in advance. i am open to ALL suggestions.

P.S. the car will eventually start running so bad it will die and then it is a bitch to get started again. stock cam.

thanks,

mason

msydow

bump for this afternoon.....any ideas
thanks

msydow

anyone have any ideas????

2xLS1

iTrader: (25)

SES on? Codes? What are you using to datalog with?

msydow

the light is on, but it only showed codes for the rear o2's. i have a set of o2's i am gonna swap into the fronts....i just have a little matco scanner. nothing fancy.

msydow

swapped out the O2's. when i disconnected my fuel pressure gauge some nasty yellow fuel came out. he was going to fill it up with gas. it is running fine, but it was running good when he left on saturday. thanks for the input.