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V6 (1994-2004) Mustangs Technical discussions on the 3.8L and 3.9L V6 torque monsters

Poor performance, No codes

Old 02-11-2019, 07:56 PM
  #1  
MustangAudioNoob
Thread Starter
 
Join Date: Sep 2011
Location: NC
Posts: 2
Default Poor performance, No codes

I've Been having issues with Betty for over a year now and it's driving me nuts.
Problems:
  • Sometimes when I start it up the idle is rough
  • Car shakes back and forth at low levels of acceleration
  • Reduced power/fuel economy
  • Idle drops from 750 to 450 then goes back up when stopped in gear
  • (probably not related) the tranny sometimes hesitates before it shifts
I've tried:
  • Replacing plugs, wires, coil pack, fuel filter, pcv valve, o2 sensors
  • Using seafoam, injector cleaner, tranny fluid changed, and cleaning the throttle body
Doesn't give me any codes and I don't have the cash to go trying every solution.
Thanks for any help.

_________________________________________
01 3.8L/ aftermarket dual exhaust/ CAI/ 2 12" Subs
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