Howdy,
My 2001 GTP (150k miles), all stock, is running rough - esp on cold starts. Buck / surge, feels like a faint random miss. About a year ago (10k miles or so) i replaced all the intake gaskets, plugs, wires, etc. Last night i changed the spark plugs
again, did not fix the problem. I've got HP tuners, and it shows no codes (other than one relating to the EBCM being bad). I can't see any vacuum leaks, i replaced the EGR a few months ago. I'm running out of ideas and about ready to sell it.
On anothers advice:
LTFT - good call, went and played around. light cruise = +16.4 maxed (red) and idle is -10% or so.
For a bone stock car this tells me something is up, what that is i'm not sure yet - fuel pressure
reg. problem?
I checked the vacuum lines, did find a few small cracks, nothing major and fixed them earlier today (fixed before logging data).
Any advice on something to check?
Thanks,
James
My 2001 GTP (150k miles), all stock, is running rough - esp on cold starts. Buck / surge, feels like a faint random miss. About a year ago (10k miles or so) i replaced all the intake gaskets, plugs, wires, etc. Last night i changed the spark plugs
again, did not fix the problem. I've got HP tuners, and it shows no codes (other than one relating to the EBCM being bad). I can't see any vacuum leaks, i replaced the EGR a few months ago. I'm running out of ideas and about ready to sell it. On anothers advice:
LTFT - good call, went and played around. light cruise = +16.4 maxed (red) and idle is -10% or so.
For a bone stock car this tells me something is up, what that is i'm not sure yet - fuel pressure
reg. problem? I checked the vacuum lines, did find a few small cracks, nothing major and fixed them earlier today (fixed before logging data).
Any advice on something to check?
Thanks,
James