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Rough idles

Tiny
BLUEJEAN
  • MEMBER
  • TOYOTA PICKUP
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?
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Monday, September 4th, 2006 AT 11:24 AM

4 Replies

Tiny
GLENERIK
  • MEMBER
  • 5 POSTS
Could you be more specific as to what you mean by rough idling? When does the idle seem "rough"?
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Wednesday, September 6th, 2006 AT 8:29 PM
Tiny
RASMATAZ
  • MECHANIC
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Did you adjust the initial voltage on the TPS
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Friday, September 8th, 2006 AT 6:07 AM
Tiny
BLUEJEAN
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This might seem like a dumb question, but how do you adjust the initial voltage on the TPS?
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Monday, September 11th, 2006 AT 7:31 AM
Tiny
RASMATAZ
  • MECHANIC
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Loosen the TPS and than backprobe it. If it checks out check the IACV

BTW any OBD2 codes?
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Monday, September 11th, 2006 AT 8:54 AM

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