RotaSpinna69

iTrader: (10)

I searched for "stalls with ac on" and didn't come up with much. The car stalls at idle with the a/c ON. Like if I am at a stop light. I'd have to check again but i'm pretty sure it happens whether or not the clutch is in or not. If the a/c is off the car is fine along with when the a/c is on and I am driving. Recently had the a/c system "rebuilt". Suggestions?

Thanks,

Andrew

revhardallday

iTrader: (1)

wats ur setup?

are u runnig a power fc?

RotaSpinna69

iTrader: (10)

I/DP/E, Pulleys, Stock ECU.

revhardallday

iTrader: (1)

wats the idle without any load?
wats the idle with the headlights, wippers and rear defrost?
wen u turn the a/c on does it dye right away? or slowly idles like **** then dyies?

RotaSpinna69

iTrader: (10)

Idle without load is 800-900
Not sure of idle with load, i'll check
The car dies pretty much right away. No sputtering.

I have a FSM and it looks like it maybe the Solenoid Valve(ISC) or maybe even the Air Control Valve.

How do I check the switch functions (a/c, blower, headlights, etc.) without the SST?

Thanks,

Andrew

scratchjunkie

had a similar problem and it turned out to be the clutch switch.

RotaSpinna69

iTrader: (10)

Hmmm...sounds like something to look into.

Also, anyone with similar problems have a CEL?

Thanks,

Andrew

Va Rx-7

iTrader: (4)

i have lil bit of same problem when i have the A/C on it doesnt die right away but after a lil bit and sometimes when i am NOT using the A/c during the day with only the radio on i stop at a stop light it struggles to idle idk yyy?? please give me some tips???

Kuda

I'm looking at buying an 93 RX7 that has a fluctuating idle. With the AC on, the idle jumps up from 800 to 1200 rpm and back down every 2 to 3 seconds.

He switched the transmission from an auto to a manual and hasn't hooked up the clutch switch. As you suggested scratch, I think that the clutch switch is the problem but my Dad isn't fully convinced.
Besides the clutch switch, is there anything else anyone can think of that could cause the engine to die or have trouble idling with the AC on?

Mods on the one I'm looking at: DP, poly motor mounts, dual DIY MBC, intake

Thanks

AzEKnightz

iTrader: (24)

seems like there is a vacuum leak causing the idle to fluctuate like that. Do a propane test to see if you can find the problem. And make sure all the vacuum hoses are plugged in and not ruptured.

TwilightRotary

iTrader: (3)

odd. my idle goes up when i use my a/c.
800/900 normally
1200 with a/c

fallinfast232

ok well im have the same problem is there anyway of testing to clutch switch?? and could that make it feel like the clutch was going out

Kuda

This is what my Dad thought the problem was. Thanks for your help Aze.

RotaSpinna69

iTrader: (10)

So now I've discovered it depends how I come to a stop when I have the AC on. If I come to a quick stop it sputters a bit and cuts off. If I approach a stop slower then the car stays on. If i come to a complete stop with the ac off, then turn the ac on, the car stays on...

cardmarc

VERY COMMON.
I rebuilt my wife's 94 MBM FD AT due to this problem. The torque convertor loads the engine down more than the MT so it happens sooner than on the MT models......which my MT is doing now. To me it appears to be the engine is suffering lower compression from wear. Anyhow, I rebuilt her FD, had the injectors flow cleaned, new seals, etc, and 60K miles later it is still ok.
Now, my 94 is suffering what you describe. I'll have to rebuild it as well.
I also had a 92 rx7 that did the very same thing. Rebuilt that one as well.
Unless you have an intake leak, or some other problem, it is probably low compression (but the engine still runs very well). I used to shift to neutral at every stop light to keep from stalling----what a pita.
Marc

fallinfast232

where is a clutch switch located at???

RotaSpinna69

iTrader: (10)

Yikes...hopefully it won't be that. I will check the compression anyways.

Thanks,

Andrew