2006 Saturn Vue 4 Cylinder Engine Will Over 20mph Codes Replaced Coil Pac ECM

2006 SATURN VUE
110,000 MILES
Avatar
DAVIDBROWN1
4 cylinder engine will not go over 20mph. No codes. Replaced coil pac and ECM after dealer diagnostic. No change. Fuel pressure 58psi and throttle shows good response to gas pedal. Any ideas?
Mar 21, 2013 at 3:56 PM
Advertisement
Avatar
SATURNTECH9
  • ✓ASE Certified Mechanic
  • 30,869 POSTS
  • ASE Certified Mechanic
Is the reduced power light on?Also has a back pressure test been done on the exhaust?
Mar 21, 2013 at 7:19 PM
Avatar
DAVIDBROWN1
  • MEMBER
  • 3 POSTS
Reduced power light not on and back pressure tests ok.
Mar 28, 2013 at 5:15 PM
Avatar
SATURNTECH9
  • ✓ASE Certified Mechanic
  • 30,869 POSTS
  • ASE Certified Mechanic
So was a diyer scan tool used to check for codes?
Mar 29, 2013 at 3:21 AM
Avatar
DAVIDBROWN1
  • MEMBER
  • 3 POSTS
Problem solved. The problem was the Accelerator Pedal Position (APP) module. I ran a resistance check and found an open in one of the circuits. Evidently the redundant circuitry kicks in and puts the car in a reduced power mode so you can limp to a service center.
Mar 29, 2013 at 1:31 PM
Avatar
SATURNTECH9
  • ✓ASE Certified Mechanic
  • 30,869 POSTS
  • ASE Certified Mechanic
Yeah that's why I asked if the reduced performance light was on and if you have codes.
Mar 30, 2013 at 3:59 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.