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Hot weather surging

Tiny
HONDADOODLE
  • MEMBER
  • 1994 HONDA ACCORD
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 350,000 MILES
The car will surge to 3000 plus rpm's when put in park. Rpm's will stay high at lower speeds, such as idling around 1500. At lower speeds the car will speed up by itself, and will fight you when you are slowing down or stopping. Problem is severe in very hot weather, and pretty much non existent all through winter. Temperature gauge shows low temperature at all times. We are pretty sure it is broken because the car runs very hot and fan is on constantly in hot weather. But we have yet to see any steam or smoke coming off anything. Fast Idle thermo valve was taken apart and deep cleaned, but had no impact on problem. Thank you very much for your time.
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Sunday, May 28th, 2017 AT 1:13 PM

3 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Try cleaning throttle plate on both sides and IAC hole with choke cleaner. If it continues look for a vacuum leak like bad/broken hoses finally scan for codes.
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Monday, May 29th, 2017 AT 6:15 AM
Tiny
HONDADOODLE
  • MEMBER
  • 2 POSTS
Family member who is a mechanic had a look. Solution found in loosening cruise control throttle cable as it was too tight, and keeping the throttle partially open at all times. Not a perfect fix, but very satisfactory.
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Thursday, June 1st, 2017 AT 7:51 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,536 POSTS
Nice work, we are here to help, please use 2CarPros anytime.

Cheers, Ken
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Monday, June 5th, 2017 AT 12:41 PM

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