dies when accelerator is pressed

all4mx

speed demon
Jun 24, 2006
48
0
0
Olympia, Washington
I have a 7mgte, and just for a little background: built lower end, mhg, BOSS TO$E 61, walbro, fpr, upgraded intercooler and piping, lex afm, alum. radiator, removed egr, elec. fans, 3.5" turbo back exhaust, safc2, aem truboost, wideband, etc....

I have basically just broke in the motor and am getting ready to take it in to get dyno tuned. I have had it parked for a few days and then go to get in it and drive it one day and it has a lopey idle and will die as soon as the gas is pressed. So I went and bought a new lex afm and that didn't fix it. I am also in the process of getting a new engine wire harness since the one I have has been cut and spliced at the cps and doesn't look the best everywhere else. Does anyone know what could be causing this? My FPR shows around 32 at idle, but could this be a fuel problem (pump, filter)? I have thoroughly check for any intercooler pipe leaks and can't find any vacuum leaks as of yet, though I don't think a small vacuum leak would cause this. The car ran fine when I parked it. Any help is appreciated.
 

JesseH

Active Member
Nov 12, 2005
1,153
0
36
Englewood, Ohio, United States
all4mx;1243033 said:
I have a 7mgte, and just for a little background: built lower end, mhg, BOSS TO$E 61, walbro, fpr, upgraded intercooler and piping, lex afm, alum. radiator, removed egr, elec. fans, 3.5" turbo back exhaust, safc2, aem truboost, wideband, etc....

I have basically just broke in the motor and am getting ready to take it in to get dyno tuned. I have had it parked for a few days and then go to get in it and drive it one day and it has a lopey idle and will die as soon as the gas is pressed. So I went and bought a new lex afm and that didn't fix it. I am also in the process of getting a new engine wire harness since the one I have has been cut and spliced at the cps and doesn't look the best everywhere else. Does anyone know what could be causing this? My FPR shows around 32 at idle, but could this be a fuel problem (pump, filter)? I have thoroughly check for any intercooler pipe leaks and can't find any vacuum leaks as of yet, though I don't thinksmall vacuum leak would cause this. The car ran fine when I parked it. a Any help is appreciated.
have you tested the AFM using a MM?
 

all4mx

speed demon
Jun 24, 2006
48
0
0
Olympia, Washington
Yes, both have been tested with a mm and both apear to work fine. My safc2 though shows no sir flow signal? Is this normal. I'm thinking that I have something wrong with my harness somewhere.