Whenever I just sit there waiting for someone in neutral just sittin' there while the car runs THE A/C goes on.. WHAT THE HELLLLLL.. whyy.. The thing isnt even on and it goes to a/c im not even using the fan.. why does it do this?? is it part of the idle to keep the car on? 1991 crx.. iono if this helps also but i dont have the a/c belt.. everytime i just sit there while the engine is in neutral it eats up the rpms.. and yea im thinkin this is a problem because the a/c goes on by itself? whyyy. help and thanks in advanced..

 

ummm...if you have no a/c belt there's no way your a/c system is coming on.

By 'eats up the rpms' do you mean you have a high idle?

 

no my idle is at like the first line.. but yea the a/c goes on automatically and it goes higher... and yea..


example.. I sit there the idle is at the first line.. then out of no where it jumps to like 1 rpm and the ac light goes on. and stays there for like 3-5 min.. then the thing goes back to normal and the ac light goes off..

 

can any one help me.

 

any one?

 

Your car is possessed.
Remove the A/C switch and see if it still does it.
If the A/C light on the switch is coming on then it sounds like the switch is shorting somehow.
Call a priest and have a full blown exorcism.

 

possessed haha. how gay. but seriously the buttons out (AC OFF) but when idlin out of no where the light comes on and the ac eats it up (the button is not push'd in) the light comes on even though its not on.

 

When i turn my ac on the revs bottom out hardcore, and the car almost stalls, is it normal to be sucking so much revs?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sincrx &raquo;</TD></TR><TR><TD CLASS="quote">When i turn my ac on the revs bottom out hardcore, and the car almost stalls, is it normal to be sucking so much revs?</TD></TR></TABLE>

Yes, but there is a connection on the ECU that is supposed to bump up the idle for you when the A/C is on.
Maybe your wire is broke or something.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by pinoyboiWONDER &raquo;</TD></TR><TR><TD CLASS="quote">possessed haha. how gay. </TD></TR></TABLE>
Not as gay as your avatar... looks like a dancing green ***** with legs

 

its a deformed teletubby

 

id say unplug that thing and see what happens , if it still comes on, then call the exorcist

 

Ahh how do i check the wire? i never even seen my ecu let alone checked it

 

If the a/c light is actually coming on without the button being pushed, then there is def. a short in the a/c system. However, when I had my a/c compressor off for service a while back, the car did NOT jump rpms if the a/c was switched on. Without the a/c system pressure, the rpms did not jump at all. Just like I had done nothing except that the blue a/c light was on. If you have no belt on the a/c compressor (why the hell not, it's still summer!?) then your rpms should do nothing when the a/c is switched on. The problem is tied, but not sure where...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sincrx &raquo;</TD></TR><TR><TD CLASS="quote">Ahh how do i check the wire? i never even seen my ecu let alone checked it</TD></TR></TABLE>

your ECU is under the plate under the carpiet on the passenger side.

here aresome helpfull pics


it's not the greatis pic but see that pannel on the passenger side? under that is ur ECU

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by johnclaunch &raquo;</TD></TR><TR><TD CLASS="quote">If the a/c light is actually coming on without the button being pushed, then there is def. a short in the a/c system. However, when I had my a/c compressor off for service a while back, the car did NOT jump rpms if the a/c was switched on. Without the a/c system pressure, the rpms did not jump at all. Just like I had done nothing except that the blue a/c light was on. If you have no belt on the a/c compressor (why the hell not, it's still summer!?) then your rpms should do nothing when the a/c is switched on. The problem is tied, but not sure where...</TD></TR></TABLE>

actually.. this is why the idle gets high. the a/c switch shorts out, turning the a/c on. the ecu see's the a/c is on and bumps the idle to compensate. although the belt is detached and the compressor isn't "using up" any rpms so the idle seems higher than it should be.

disconnect the plug behind the a/c button on the hvac controls.

 

Cheers for the diagram, i got a dohc zc non vtec lol, so will be hard, but ill just look for loose wires etc, if u hav n e idea which one is the ac idle one to make my idle come bak u (e.g. wat colour) plz tell me

 

B3 = A/C Compressor Clutch Relay Control = YELLOW
B4 = A/C on Input = YEL/GRN

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crx_88_si &raquo;</TD></TR><TR><TD CLASS="quote">B3 = A/C Compressor Clutch Relay Control = YELLOW
B4 = A/C on Input = YEL/GRN
</TD></TR></TABLE>



And for pretty pictures and stuff...
http://www.fourthgenhatch.com/mpfi.html

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 4drEF &raquo;</TD></TR><TR><TD CLASS="quote">



And for pretty pictures and stuff...
http://www.fourthgenhatch.com/mpfi.html</TD></TR></TABLE>

uh.. that pinout for the mpfi says B8 = a/c switch ???