My brother had a new A/C compressor put on today and now when you turn it on, the idle goes up and down. You turn off the A/C and it stops right away. I searched and it looks like people are saying bleeding the coolent may help?

 

 

i know there is a relay or something of that sort that is supposed to keep the idle from doing this when the ac is turned on... forgot the friggin name of it... someone help me out here

 

air conditioning idle control solenoid valve

 

How much does it fluctuate? Every car I've been in, Honda or not, does this. Drop and raises a couple hundred RPM.

 

Its actually normal. Not a huge jump, but a noticeable one.

 

No, it sounds like someone is pumping the gas. I wasn't in the car to see the actual RPM's, but it's very loud, not normal at all. Also, his air is still blowing out hot. The guys at the shop who looked at it said they think the ECU in the car is bad, the part that goes to the A/C System. That sounds like the stupidest thing I've ever heard, haha. But I have no idea. They claim it had worked for them off and on, but we've yet to have cold A/C. I guess we'll have to continue to mess with it this week. We're both stumped.

Where would this air conditioning idle control solenoid valve be located?

 

what year and model of car?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by justin: &raquo;</TD></TR><TR><TD CLASS="quote">

Where would this air conditioning idle control solenoid valve be located? </TD></TR></TABLE>

Next to the Air conditioner idle control soleniod valve wires.

 

He drives a '98 EX if it matters:

 

bump. i'm having the same problem. when the motor is at idle, the ac stops getting cold. as soon as i move, it get cold.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by justin: &raquo;</TD></TR><TR><TD CLASS="quote">He drives a '98 EX if it matters:

</TD></TR></TABLE>

actualy, it does. I have the Helm's manual for 96-2000 civic in front of me and it lists 2 diffenent schematics for those years. also, earlier eg civic might use a different system.

anyway, does the condensor fan turn on at all? you might have a look at the compressor clutch relay and the condensor fan relay. Both get their signals from the ecu, so the garage guys might be right. relays are located in the fuse box under the hood.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dc-lefty &raquo;</TD></TR><TR><TD CLASS="quote">bump. i'm having the same problem. when the motor is at idle, the ac stops getting cold. as soon as i move, it get cold. </TD></TR></TABLE>

check to see if the condensor fan comes on when the compressor engages.

 

Went and took it to another shop today. They said the same exact thing the other place told us, crazy enough. He needs to replace his ECU, lol. Weird. Thanks for the help peoples

 

back from the dead, any suggestions