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RUNS, BUT SPUTTERS WHEN IDLES

Tiny
TIMBO75
  • MEMBER
  • 1999 TOYOTA AVALON
  • 142,000 MILES
ACCELERATION GETTING "ROUGH". AC NOT WORKING. HARD START. DIAGNOSIS?

Oil changed regularly, and level is fine. AC motor makes a wretched grinding noise when AC switch or defrost is engaged. No cool air from vents during AC engagement.

Idling very rough. Hesitation during acceleration from stop. Slight hesitation during acceleration while moving. "Sensor " on exhaust port at front of engine would smoke after engine ran.
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Saturday, June 9th, 2012 AT 3:48 PM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Do you have a check engine light and when was the last tune-up?

Start by cleaning the idle air control valve and the MAF sensor, also check exhaust system for restriction-For the AC check the high and low pressure-could be low/no freon in it-start here
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Saturday, June 9th, 2012 AT 3:56 PM
Tiny
TIMBO75
  • MEMBER
  • 2 POSTS
No check engine light is on, last tune up was two years ago.
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Saturday, June 9th, 2012 AT 4:03 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
It sounds like it could be a valve that is burned or a cam that is going flat.
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Saturday, June 9th, 2012 AT 4:06 PM

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