2000 Jaguar XK8 Engine rough running fault code P1638,PP100

2000 JAGUAR XK8
14,500 MILES • V8 • 2WD • AUTOMATIC
Avatar
BRALDEN
  • MEMBER
  • 34 POSTS
Hi I have slight engine roughness with fault codes P1638, P1000, P0171, and P0174. Is this a MAF or something more involved. What should I check first?
Jul 16, 2010 at 10:37 AM
Advertisement
Avatar
DOCFIXIT
  • ✓ASE Certified Mechanic
  • 18,828 POSTS
  • ASE Certified Mechanic
Hi
Does check engine light stay on? Will engine rev over 3000RPMS? Have codes been erased in past?Recent repairs?
Let me know
Thanks for donate
Jul 16, 2010 at 12:01 PM
Avatar
BRALDEN
  • MEMBER
  • 34 POSTS
No recent repairs. It revs up fine. Just has a misfiring at idle(engine roughness) and codes that will not erase. I would of just replaced the MAF but it has the other code for the computer. I also don't want to because every time I had ANY car with a fault code besides the MAF, replacing the MAF did not do anything but burn money. Any help greatly is appreciated.
Jul 17, 2010 at 10:49 AM
Avatar
BRALDEN
  • MEMBER
  • 34 POSTS
I will start by checking all of the fuses and relays. The battery is good.
Jul 17, 2010 at 11:39 AM
Avatar
DOCFIXIT
  • ✓ASE Certified Mechanic
  • 18,828 POSTS
  • ASE Certified Mechanic
O.K. to be sure would need car scanned by diagnostic tool to confirm but maybe faulty ECM because of lean codes and 1638.Don't think replacing MAF is way to go try cleaning with a MAF cleaner.THe 1000 is the problem some ECM functions inhibited and must be relearned
So dealer may need to flash ECM to correct. Try this Disconnect battery for couple minutes see if codes are erased.
Jul 17, 2010 at 3:20 PM
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.