rx7babygurl85

im having a problem with i run my a/c.. when i run it my car will die i can keep it from dieing by kepeing my foot on the gas.. but really i dont like doing that plus i forget once time when i come up to a stop light then it'll die.. so what all do i have to check and see where ,, the problem might be?? ohh yeah sorry no i didnt search if theres anything about this...

andrew lohaus

bad BAC valve. give it a cleaning or replce. haynes manual covers how to.

Syonyk

Yup. What he said. Alternately, see if the connector has fallen off or something.

The A/C puts a significant load on the engine, and the engine doesn't make enough power at idle to keep it running without additional airflow. There's a bypass valve that opens with the A/C on (and the power steering IIRC) to make sure things continue running. If it's not working, you'll die out with the A/C on.

-=Russ=-

WAYNE88N/A

Yeah ^^^, I think the air bypass valve should energize open with the A/C button in. If it doesn't open, the BAC may not have enough ***** to keep her alive on its own...

Could be the compressor is going bad also, dragging everything down with it. Do the belts squeak at all when the AC kicks on?

SonicRaT

iTrader: (6)

Didn't your boy just fix this problem the other day, or did that just fix everything except for the A/C?

rx7babygurl85

sonic it fixed the idle and all but not the a/c... so does it have to be the bac? what if the belts squeak? what does that mean.. im not sure if they do or not

C-Murder

do you hear a squeek when the AC is on, that would classify as "hearing a squeek". Just tell us if you hear a squeek. Its most likely the BAC, since that is what controls airflow, bypassing the throttle body when there is a load at idle, like AC. Definitely check it, its almost guarenteed the problem.

SonicRaT

iTrader: (6)

I'm quite positive their BAC works rather well (considering it was basically controlling their idle before). I'd have him try to turn it up some more. Whens the last time you had a fluid change on that auto tranny?

WAYNE88N/A

Yeah, if you're not having idle problems with any other electrical loads (headlights, e-fan, etc), then the BAC is probably good...

What about turning the steering wheel at low (or no) speeds? If you have power steering, of course. Does that make it die too? If so, definetly look into the ABPV thing...

SonicRaT

iTrader: (6)

Yeah, that's the problem they had before. Their mechanical idle was set WAY too low, with the BAC unplugged it wouldn't even idle, so I had them turn the mechanical idle up and from what i heard back every other electrical load was good and it'd not drop and die like it did before and all was well. This A/C is confusing me though, unless the other problem came back. But then again, the auto's DO drop the idle considerably, even with the bac down to like 600rpm (from 800-900), which was why I was asking about a fluid change/etc maybe to get that thing to create less drag.

rx7babygurl85

where getting the fluid changed tomorrow.. had to order the gasket and the filter.. ive never changed that since ive had the car.. (3 years) how ofter would you want to do that? whats the ABPV?

Tristan Bull

Did you ever fix your A/C problem? I just recharged/converted my A/C earlier this week and I have the same problem. Whenever I turn the A/C on, the idle rpm drops really low(500rpm or so) and bounces and sometimes the engine will stall if I don't give it gas. When I turn the steering wheel at idle, the engine will drop maybe 100rpm or so, but it never seems like it's gonna die. I don't have any squeaky belts with or without the compressor on.

My BAC seems to be in good working order. It checks out okay with the DMM. The engine idles fine otherwise, but sometimes it is high once the engine is warm.

rx7babygurl85

nope i still have the problem, and my car completely dies when you have the a/c im not sure what else to do about it anymore. besides getting a new alt, and battery.. cause i dont know what else to check,...sorry that i cant be much of any help cause mines still all messed up..

evileagle

iTrader: (1)

Make sure the bearings on your pulleys are all nice and loose, I had a similar problem with a friends car a while ago. Turns out that his idler pulley for his A/C and his PS, AND the clutch for the A/C pump had seized. If the belts are nice and sticky on those pulleys that don't want to move it could just be choking the engine.

iceblue

No it wont be that. what Wayne88N/A was saying is the compressor may be bad or going bad. Basically the compressor is to difficult to spin for the motor dragging it down and causing car to die.

The reason for turning the steering wheel side to side is for the PS pump to kick on causing a load on the engine.

You can put a volt meter on the ALT and see if it is putting out at-least 14V. The be looking at BACV still or bad AC compressor.

rx7babygurl85

i dont know if this helps any but, if i move my steering wheel side to side my rpms drop down to 700 rpms (i keep my idle at 1k) so if that does that it should be something to do with me belts?

baby doll

From my reserch on here. Bad BACV

MARTIN

If your idle is at 1k there is no way the bac could be to blame for the problem. Your car shouldnt be dieing if its idling at 1k...

rx7babygurl85

its not the bac cause i know its good and ive switched it out with another good to see if it made a difference and well it doesnt, so what else is there to check ?