Idle problem?

Wich88 · March 1st, 2011, 09:21 PM

Ok guys, I just bought a 97 Cobra and at idle the rpms jump up to 2000 hold for about 10 seconds then fall back down to normal then jump up again. Any ideas on what might be causing this??

97mustanggt · March 2nd, 2011, 10:35 AM

start by buying a new iac solenoid and cleaning your maf.

Wich88 · March 2nd, 2011, 11:38 AM

Originally Posted by 97mustanggt

start by buying a new iac solenoid and cleaning your maf.

Will try. I think I'm going to try cleaning the Iac first. Thanks

97mustanggt · March 2nd, 2011, 12:53 PM

k let us know how it goes

'97'Cobra · March 2nd, 2011, 12:55 PM

i had my idle tuned lower so its not sitting at 2k like that.

dudelinger · March 2nd, 2011, 02:58 PM

if your IAC is bad, it usually can't be cleaned and needs replacement....Can you hear changing whistle/vacuum sound when it goes up or down?

Wich88 · March 2nd, 2011, 03:11 PM

Originally Posted by dudelinger

if your IAC is bad, it usually can't be cleaned and needs replacement....Can you hear changing whistle/vacuum sound when it goes up or down?

Not that I can tell. If cleaning it doesn't help, I guess I'll drop a $100 for a new one!

97mustanggt · March 2nd, 2011, 04:00 PM

Idle Air Control Valve | 1997 Ford Mustang Cobra 8 Cylinders V 4.6L SFI | AutoZone.com

Wich88 · March 2nd, 2011, 04:27 PM

Originally Posted by 97mustanggt

Idle Air Control Valve | 1997 Ford Mustang Cobra 8 Cylinders V 4.6L SFI | AutoZone.com

Cool! With 80,000 miles on the car, I'm better off just spending the $54 and putting on a new Iac!

dudelinger · March 2nd, 2011, 04:35 PM

Yep, they all seem to go out or make a fluttering noise at some point!....just did my uncles 02 gt IAC with about 75k on it a month ago

Wich88 · March 3rd, 2011, 04:29 PM

Ok guys thanks for the problem solving. I cleaned the Iac and that fixed the problem, so I decided just to go ahead and put a new one on since the car has 80,000 miles on her. Few more issues to take care of on her then its time for mods!!

97mustanggt · March 4th, 2011, 03:59 PM

glad it fixed the problem

March 1st, 2011, 09:21 PM	#1
Wich88 Regular 1997 SVT Cobra Join Date: Dec 2010 Location: GBT, Michigan Posts: 488 iTrader: 0 reviews	Idle problem? Ok guys, I just bought a 97 Cobra and at idle the rpms jump up to 2000 hold for about 10 seconds then fall back down to normal then jump up again. Any ideas on what might be causing this??

March 2nd, 2011, 10:35 AM	#2
97mustanggt Hardcore Enthusiast 97GT & 97Snake & 00L T.B.A Join Date: Aug 2008 Location: Richgrove, Ca Posts: 2,183 iTrader: 0 reviews	start by buying a new iac solenoid and cleaning your maf. __________________ 97 Cobra & 00 Lightning Beauty & The Beast I rev next to hybrids so they can hear me kill the environment MM Cobra Club Member #77 MM Lightning Club Founder

March 2nd, 2011, 12:53 PM	#4
97mustanggt Hardcore Enthusiast 97GT & 97Snake & 00L T.B.A Join Date: Aug 2008 Location: Richgrove, Ca Posts: 2,183 iTrader: 0 reviews	k let us know how it goes __________________ 97 Cobra & 00 Lightning Beauty & The Beast I rev next to hybrids so they can hear me kill the environment MM Cobra Club Member #77 MM Lightning Club Founder

March 2nd, 2011, 02:58 PM	#6
dudelinger Newbie 1997 Mustang Cobra SVT soon! Join Date: Feb 2009 Location: Oroville,CA Posts: 48 iTrader: 0 reviews	if your IAC is bad, it usually can't be cleaned and needs replacement....Can you hear changing whistle/vacuum sound when it goes up or down? __________________ 8:1 HCI built motor, D1SC Procharged/intercooled,custom ground cams,HCI intake manifold,MSD dig ignition,KOOKs Full Lengths,MM full tubular,Pro-motion tko 600, 3" Bassani xpipe,Magnaflows,much more! 625RWHP/510RWT

March 2nd, 2011, 04:00 PM	#8
97mustanggt Hardcore Enthusiast 97GT & 97Snake & 00L T.B.A Join Date: Aug 2008 Location: Richgrove, Ca Posts: 2,183 iTrader: 0 reviews	Idle Air Control Valve \| 1997 Ford Mustang Cobra 8 Cylinders V 4.6L SFI \| AutoZone.com __________________ 97 Cobra & 00 Lightning Beauty & The Beast I rev next to hybrids so they can hear me kill the environment MM Cobra Club Member #77 MM Lightning Club Founder

March 2nd, 2011, 04:35 PM	#10
dudelinger Newbie 1997 Mustang Cobra SVT soon! Join Date: Feb 2009 Location: Oroville,CA Posts: 48 iTrader: 0 reviews	Yep, they all seem to go out or make a fluttering noise at some point!....just did my uncles 02 gt IAC with about 75k on it a month ago __________________ 8:1 HCI built motor, D1SC Procharged/intercooled,custom ground cams,HCI intake manifold,MSD dig ignition,KOOKs Full Lengths,MM full tubular,Pro-motion tko 600, 3" Bassani xpipe,Magnaflows,much more! 625RWHP/510RWT

March 3rd, 2011, 04:29 PM	#11
Wich88 Regular 1997 SVT Cobra Join Date: Dec 2010 Location: GBT, Michigan Posts: 488 iTrader: 0 reviews	Ok guys thanks for the problem solving. I cleaned the Iac and that fixed the problem, so I decided just to go ahead and put a new one on since the car has 80,000 miles on her. Few more issues to take care of on her then its time for mods!!

March 4th, 2011, 03:59 PM	#12
97mustanggt Hardcore Enthusiast 97GT & 97Snake & 00L T.B.A Join Date: Aug 2008 Location: Richgrove, Ca Posts: 2,183 iTrader: 0 reviews	glad it fixed the problem __________________ 97 Cobra & 00 Lightning Beauty & The Beast I rev next to hybrids so they can hear me kill the environment MM Cobra Club Member #77 MM Lightning Club Founder

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