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1984 Honda Accord idles too fast

Tiny
FOURBEE
  • MEMBER
  • 1984 HONDA ACCORD
I have a 1984 Honda Accord, 1.8L 4 cyl, w/5 speed manual tranny. One day it was fine, the next day the idle goes up to 3000 rpm. I replaced the carb (3 bbl Keihin) and the problem remains. It runs well and has 205,000 miles, but when you stop, it idles up to 3000 rpm. I can't figure it out. What should I do?
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Thursday, July 12th, 2007 AT 4:04 PM

3 Replies

Tiny
BRUCE HUNT
  • MECHANIC
  • 3,754 POSTS
I might check the PCV and other vacuum lines.
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Tuesday, July 17th, 2007 AT 10:23 AM
Tiny
FOURBEE
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  • 2 POSTS
I replaced the pvc hose and the idle has gone down to 2500 rpm. Do you think the o2 sensor could cause the problem?
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Tuesday, July 17th, 2007 AT 10:10 PM
Tiny
BRUCE HUNT
  • MECHANIC
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Yes it could but would I start there? No. Is the idle constant? Make sure you check all vac hoses for connection and wear.
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Wednesday, July 18th, 2007 AT 8:42 AM

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