94 cobra idle

94snake · 01-31-2008, 02:49 PM

ok folks my car idles great at a complete stop, but when im driving down the road and i push the clutch in to slow down the rpm's jump up to 1400-1500. It wont idle until i come to a complete stop, then the rpm's jump str8 to normal 800 idle speed. Also i should add that i do have an IAC on there from a 3.8L v6 stang, same design and mount...is this the culprit?... i have looked all over for vaccum leaks so far have found none!! TPS is dialed in .98 of a volt and timing is at 12... any suggestions please this is driving me crazy?? THANX

USMC302 · 02-05-2008, 12:02 AM

The IAC could be it, try swapping out or putting a vacuum gauge on there, you should be pulling around 12-14in at idle....Let us know.

94snake · 02-06-2008, 01:26 PM

Quote:

Originally Posted by USMC302

The IAC could be it, try swapping out or putting a vacuum gauge on there, you should be pulling around 12-14in at idle....Let us know.

Ok i am gonna swap out the IAC for the right 1...... with the vacuum guage, what do i hook it up to??? thanx for your reply!

USMC302 · 02-06-2008, 10:35 PM

You can hook it up to any of the ports on the vacuum tree on the back of the intake, or look for a closed off port on the firewall to try. Good luck.

94snake · 02-19-2008, 05:11 PM

Quote:

Originally Posted by USMC302

You can hook it up to any of the ports on the vacuum tree on the back of the intake, or look for a closed off port on the firewall to try. Good luck.

Well i finally got the right part for the car and all is well..... thanx USMC!!!! as soon as i get subframe connectors i will be rippin the 8the mile with my new 2.02 edel

brock heads!!!!

01-31-2008, 02:49 PM	#1 (permalink)
94snake Registered Member Join Date: Nov 2002 Location: Panama City Fl. Posts: 151	94 cobra idle ok folks my car idles great at a complete stop, but when im driving down the road and i push the clutch in to slow down the rpm's jump up to 1400-1500. It wont idle until i come to a complete stop, then the rpm's jump str8 to normal 800 idle speed. Also i should add that i do have an IAC on there from a 3.8L v6 stang, same design and mount...is this the culprit?... i have looked all over for vaccum leaks so far have found none!! TPS is dialed in .98 of a volt and timing is at 12... any suggestions please this is driving me crazy?? THANX

02-05-2008, 12:02 AM	#2 (permalink)
USMC302 Registered Member Join Date: Apr 2001 Location: San Diego, Ca Posts: 1,265	Re: 94 cobra idle The IAC could be it, try swapping out or putting a vacuum gauge on there, you should be pulling around 12-14in at idle....Let us know. __________________

02-06-2008, 10:35 PM	#4 (permalink)
USMC302 Registered Member Join Date: Apr 2001 Location: San Diego, Ca Posts: 1,265	Re: 94 cobra idle You can hook it up to any of the ports on the vacuum tree on the back of the intake, or look for a closed off port on the firewall to try. Good luck. __________________

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