Motor cuts off with ac on... - 2003-04 Mach 1 Registry Owners Club

magdrive · 06-08-2008, 07:12 PM

Does anyone have an idea where to find the valve or sensor that is causing the problem. Motor cuts off with the ac on. It idles down to low. It use to idle high with the ac on. Any advice accepted.

birdman941 · 06-08-2008, 07:42 PM

IAC valve is probably in need of replacement.

magdrive · 06-08-2008, 09:48 PM

Is that the valve thats on the passenger side mounted on the back of the throttle body.

jasonkdarling · 06-08-2008, 10:22 PM

You are correct on the location of the IAC.

It could also possibly be a relay that is supposed to inform the computer of the extra load on the engine.

wutang61 · 06-09-2008, 01:25 AM

IAC sounds like its crapping out.

04mach_man · 06-09-2008, 08:27 AM

Quote:

Originally Posted by magdrive

Does anyone have an idea where to find the valve or sensor that is causing the problem. Motor cuts off with the ac on. It idles down to low. It use to idle high with the ac on. Any advice accepted.

What kind of mods? did you replace anything like throttle body or TPS, Cams,ect?

magdrive · 06-09-2008, 09:54 PM

Car is stock except for the flowmaster exhaust. There is no warning lights on. It also runs great with the ac off but idles down with ac on and will cut off at stop lights.

06-08-2008, 07:12 PM	#1
magdrive Registered User Join Date: Nov 2007 Location: Washington, NC Posts: 64	Motor cuts off with ac on... Does anyone have an idea where to find the valve or sensor that is causing the problem. Motor cuts off with the ac on. It idles down to low. It use to idle high with the ac on. Any advice accepted.

06-08-2008, 07:42 PM	#2
birdman941 Torque wins! Join Date: Dec 2004 Location: Florida Posts: 13,167	Re: Motor cuts off with ac on... IAC valve is probably in need of replacement. __________________ The ORIGINAL Project R build thread is back ! 5.4 32V NA Streetable 404/387 26.56 MPG "I don't like repeat offenders, I like DEAD offenders" Ted Nugent "A big engine hardly working is more efficient than a little engine screaming its head off" Jay Leno

06-08-2008, 09:48 PM	#3
magdrive Registered User Join Date: Nov 2007 Location: Washington, NC Posts: 64	Re: Motor cuts off with ac on... Is that the valve thats on the passenger side mounted on the back of the throttle body.

06-08-2008, 10:22 PM	#4
jasonkdarling Registered User Join Date: Feb 2008 Location: Alma, Michigan Posts: 166	Re: Motor cuts off with ac on... You are correct on the location of the IAC. It could also possibly be a relay that is supposed to inform the computer of the extra load on the engine. __________________ 2003 Azure Blue Manual Mach 1 @ 75,000 miles & counting Steeda Cold Air Intake, BBK Long Tube Headers, BBK X-Pipe w/ Mini-Cats, AFS Wheels (Rear - 315/35ZR17's on a 11" wide rim, Front - 275/40ZR17's on a 9" wide rim), Shaker Mods... "fogged" Plexi diverter w/ 12 blue LED's with on/off switch, painted hood stripe (Rustoleum 777 Satin Black) Regrets: Shoulda went with a H-pipe and dropped the cats... but at least they are gutted.

06-09-2008, 01:25 AM	#5
wutang61 CAT MASTA! Join Date: Jun 2007 Location: Vero Beach, Florida Posts: 3,406	Re: Motor cuts off with ac on... IAC sounds like its crapping out. __________________ 04' Torched *6-speed* Build Date: 02/25/2004 Ported Eaton @7psi Viper T-56 Built 8.8,4.10's 441/402

06-09-2008, 09:54 PM	#7
magdrive Registered User Join Date: Nov 2007 Location: Washington, NC Posts: 64	Re: Motor cuts off with ac on... Car is stock except for the flowmaster exhaust. There is no warning lights on. It also runs great with the ac off but idles down with ac on and will cut off at stop lights.

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