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1996 Honda Accord Warm air/Idle/Acceleration

Tiny
JBUONOCORE
  • MEMBER
  • 1996 HONDA ACCORD
  • 4 CYL
  • FWD
  • MANUAL
  • 207,500 MILES
When my air is set to vent from the outside with the AC off, warm air is produced even though the outside air is much cooler. I have replaced the thermostat and coolant but the problem still exists. Any suggestions?

I also have a problem with idle and acceleration. The idle is missing and the acceleration seems like I am only under 3 cylinders of power. I have had a tune up, replaced plugs, wires, distributor, check timing, etc. The dealer cleaned the idle body and idle screw and the problem went away. However, that only lasted 2 months and the problems returned. At a cost of $200, I do not want to keep paying this over and over. Any suggestions?
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Friday, April 11th, 2008 AT 7:28 AM

3 Replies

Tiny
BRUCE HUNT
  • MECHANIC
  • 3,754 POSTS
Heat and cold air mix in the plenum. There is a damper that lets in hot air and closes of the hot air. I would say that the door is not working and is stuck part way.

On the engine miss are you getting a check engine light? The fuel economy of the vehicle must be terrible.

If you pull the plugs one at a time they may indicate which cylinder is not performing to the best of its ability. The issue could be your EGR valve or an injector.
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Friday, April 11th, 2008 AT 10:40 AM
Tiny
JBUONOCORE
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  • 2 POSTS
Thanks for the prompt response.

As far as the plenum, can I access that? If so, is this something I can try and fix?

As far as the idle, no check engine light illuminated. The mph has decreased from 33-35 to 28. With gas prices going up, this is now noticeable in the pocket!
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Friday, April 11th, 2008 AT 11:30 AM
Tiny
BRUCE HUNT
  • MECHANIC
  • 3,754 POSTS
I have a diagram of the heater system and there is a very good chance that this is beyond most do it yourselfers. Now if you still wish to pursue this on your own I can send you some materials via email. Let me know.
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Monday, April 14th, 2008 AT 12:45 PM

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