1994 Honda Civic Engine Runs Hot while Idling

Tiny
BTONY86
  • MEMBER
  • 1994 HONDA CIVIC
Engine Cooling problem
1994 Honda Civic 86,500 miles

1994 Honda Civic LX 86,500 miles and my radiator gauge keeps going up to "H" whenever I'm idle with my foot on the brake (ex: like at a stop sign or drive thru) or when I'm in park. This happens with and without the heat or A/C running. But whenever I accelerate past 30 MPH or so, the gauge goes back down to normal. It never overheats when I'm driving, but only when I'm idle. The check engine light also has a mind of it's own--it comes on periodically but never stays on (sometimes it comes on when I start the car, especially after a rough start, and other times it doesn't). Do you know what's going on and if these problems are connected?
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Thursday, April 9th, 2009 AT 5:51 PM

5 Replies

Tiny
RASMATAZ
  • MEMBER
Are the cooling fans coming On? Check the thermostat and coolant level if okay. Check the radiator/radiator cap and water pump.
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Thursday, April 9th, 2009 AT 6:01 PM
Tiny
F4I_GUY
  • EXPERT
First and foremost read the trouble code, this will help me assist you.

Also, when you are at idle, does your cooling fan come on? Anytime your vehicle is overheating the fan should turn on, if it doesn't you have a problem with either the fan itself, relay, fan switch, etc.
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Thursday, April 9th, 2009 AT 6:02 PM
Tiny
BTONY86
  • MEMBER
The radiator was installed around Jan 08, and the water pump, timing belt, and thermostats were installed in May 2008. And yes, I do hear the fans click on when I'm idle. Now the check engine light is tricky. It doesn't come on and stay on and every time I go to get it checked the light is never on to get a reading (must terrible timing or something).
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Thursday, April 9th, 2009 AT 6:35 PM
Tiny
BTONY86
  • MEMBER
The code that popped up was 9. I looked it up and was surprised that 9 referred to the distributor. Is this correct? I would be surprised if it was the distributor because I just got a brand new distributor installed last September.

And to update with the radiator situation. I brought and installed a new radiator cap a few weeks ago and haven't had the problems with the radiator needle since. It now never goes past midway.
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Sunday, April 26th, 2009 AT 1:17 PM
Tiny
F4I_GUY
  • EXPERT
CYP- cylinder position sensor


http://www.2carpros.com/forum/automotive_pictures/276698_CYP_1_1.jpg



http://www.2carpros.com/forum/automotive_pictures/276698_CYP_2_1.jpg



http://www.2carpros.com/forum/automotive_pictures/276698_CYP_3_1.jpg

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Sunday, April 26th, 2009 AT 7:14 PM

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