PDA

View Full Version : Air con stalls car


mchngun
19-11-2006, 12:54 PM
I bought an EK4 with a Microtech LT8-S (i think).

When i turn the aircon on the car reaches almost zero rpm and sometimes even stalls. Im aware on the stock ECU when the aircon is on the car will increase the revs to prevent this.

Is there a solution to this?
ECU-MAN
19-11-2006, 08:01 PM
adjust the base idle to a higher RPM
SKREMN
19-11-2006, 08:26 PM
its not possibel that the air con pully is seazed or nothing like that?
ECU-MAN
19-11-2006, 08:29 PM
if it was seized when ever the AC is turned on at higher RPM you would shread the AC belt.


they do put a bit of load on the engine at idle, and with out compensation by the IACV RPMs will be very low
Limbo
19-11-2006, 10:53 PM
Usually most aftermarket computers have a sensor for a/c load, which will idle it higher. Maybe it was not wired in properly? or you have not checked the idling on the ecu that has the air-con settings.

Yeah it isn't the prob with the a/c its that the engine is not idling high enough under the a/c load
zorrt
20-11-2006, 02:30 PM
Sorry for the hijack but for my car my ECU doesnt increase the rev when aircon is on so whenever the radiator fan comes on the rev just drops and feels like it wants to stall then picks back up. Is that normal?
quangsta
20-11-2006, 04:14 PM
yes...
wen aircon is on it should drop revs...about 400rpm...
SKREMN
20-11-2006, 04:49 PM
if it was seized when ever the AC is turned on at higher RPM you would shread the AC belt.


they do put a bit of load on the engine at idle, and with out compensation by the IACV RPMs will be very low

In most cases probably yes
but my mate had a ford telstar and it had shit bearings in it where the car would almost stall and run liek shit we cut the belt off and he needed a new compressor...
JohnnyVtec
20-11-2006, 05:33 PM
I bought an EK4 with a Microtech LT8-S (i think).

When i turn the aircon on the car reaches almost zero rpm and sometimes even stalls. Im aware on the stock ECU when the aircon is on the car will increase the revs to prevent this.

Is there a solution to this?

Gday m8,

If i may, I would like to ask you for some further information first?
Upon cold starting the vehicle does it idle up on it's own?=So as to suggest that the ecu and iacv are working in conjunction. Did you perform the ecu installation and program yourself or have someone else do it?=Initialising the high load idle setting in an ecu with factory style learning curves is necessary reguardless of aspiration.


Pm me if you'd like and i will more than likely be able to help you so long as you have the answers to these questions.

Cheers,
EuroDude
20-11-2006, 06:09 PM
It may not be caused by the Microtech LT8-S, rather it could simply be a dirty throttle body causing bad idle which is amplified/noticed when A/C is on. Clean the IACV filter while ur at it.
ECU-MAN
20-11-2006, 06:59 PM
It may not be caused by the Microtech LT8-S, rather it could simply be a dirty throttle body causing bad idle which is amplified/noticed when A/C is on. Clean the IACV filter while ur at it.


I dont think he running a IACV. may not be connected



In most cases probably yes
but my mate had a ford telstar and it had shit bearings in it where the car would almost stall and run liek shit we cut the belt off and he needed a new compressor...


but that was a FORD
mchngun
20-11-2006, 08:24 PM
Gday m8,

If i may, I would like to ask you for some further information first?
Upon cold starting the vehicle does it idle up on it's own?=So as to suggest that the ecu and iacv are working in conjunction. Did you perform the ecu installation and program yourself or have someone else do it?=Initialising the high load idle setting in an ecu with factory style learning curves is necessary reguardless of aspiration.


No on cold starts the idle stays the same. And the ECU was already in the car when i bought it, does anyone know if the microtech has the sensor for AC load ?
JohnnyVtec
21-11-2006, 02:25 PM
No on cold starts the idle stays the same. And the ECU was already in the car when i bought it, does anyone know if the microtech has the sensor for AC load ?


How ya going m8,

Ok if the car starts and idles up on it's own, then your iacv is connected and probably working just fine. i do not know of microtech so i cannot answer many questions about them. what i can suggest to you is that you attempt to set the ecu for high load idling. pm me and i'll tell you how to do it.

Cheers,