rough idles

TOYOTA PICKUP
Avatar
BLUEJEAN
  • MEMBER
  • 20 POSTS
I have a 1998 toyota tacoma 2wd pu with a 2.4 eng. The truck has 90,000mi. on it. I gave it a full tune up, including the wires. I replaced both o2 sensors , egr valve, and throtal positioning switch. I also replaced the seals around the injectors, cleaned the intake and throtal body. And it still idles rough. Mind you, the last person who own this truck never gave it a tune up, he just did oil changes every 3,000mi. What can it be?
Sep 4, 2006 at 11:24 AM
Advertisement
Avatar
GLENERIK
  • MEMBER
  • 5 POSTS
Could you be more specific as to what you mean by rough idling? When does the idle seem "rough"?
Sep 6, 2006 at 8:29 PM
Avatar
RASMATAZ
  • CAR REPAIR CONTRIBUTOR
  • 75,992 POSTS
Did you adjust the initial voltage on the TPS
Sep 8, 2006 at 6:07 AM
Avatar
BLUEJEAN
  • MEMBER
  • 20 POSTS
This might seem like a dumb question, but how do you adjust the initial voltage on the TPS?
Sep 11, 2006 at 7:31 AM
Avatar
RASMATAZ
  • CAR REPAIR CONTRIBUTOR
  • 75,992 POSTS
loosen the TPS and than backprobe it. if it checks out check the IACV

BTW any OBD2 codes?
Sep 11, 2006 at 8:54 AM
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.