02 4v Swap issues. - Mustang Evolution

Go Back   Mustang Evolution > 1979-2015 Mustang GT || Tech and Talk > 1996-2004 Mustang GT



Reply
 
Thread Tools Search this Thread
Please support our sponsors and let them know you heard about them here!
Old 06-17-2012, 03:23 PM   #1
Registered Member
Regular
 
32vNomad's Avatar
 
Join Date: May 2011
Region: Michigan
Posts: 655
02 4v Swap issues.

My only issue I am having is the IAC valve. The setup I have is a built Mark Motor with a 98 Mark intake.

Attachment 55150

Now at startup I had noticed a very large air leak. The engine would start but die. I fixed the accel to barely stay open so the engine would run. I traced the leak to the IAC. Not from the gasket but from the metal cap on top. So I changed it out with my 2v one, running a hose from the iac to the intake tube. With a turn or the key the engine fires and idles smooth as silk.

Attachment 55151

I went out and got another IAC for a Mark and still the same leak but it did idle at about 450rpm. I'm at a loss at this, I'm wondering if a restictor would work. Is there anyone that has did this swap have any info. Photos would be nice.
32vNomad is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 06-18-2012, 03:57 PM   #2
Registered Member
Regular
 
32vNomad's Avatar
 
Join Date: May 2011
Region: Michigan
Posts: 655
Re: 02 4v Swap issues.

*bump
32vNomad is offline   Reply With Quote
Old 06-18-2012, 05:02 PM   #3
Registered Member
Regular
 
AgentOrange's Avatar
 
Join Date: Oct 2011
Region: Florida
Posts: 991
Not trolling, but why not just stick with the 2v iac? BTW I love that you did the Mark swap.
AgentOrange is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 06-18-2012, 05:05 PM   #4
Registered Member
Regular
 
NeedSomeMods's Avatar
 
Join Date: Jul 2009
Region: Texas
Posts: 775
Quote:
Originally Posted by AgentOrange
Not trolling, but why not just stick with the 2v iac? BTW I love that you did the Mark swap.
That's exactly what I was thinking.
__________________
2000 V6 - RIP
The '94 -
NeedSomeMods is offline   Reply With Quote
Old 06-18-2012, 05:29 PM   #5
Registered Member
Regular
 
95v686gt's Avatar
 
Join Date: Mar 2012
Region: Kentucky
Posts: 813
You could try a restrictor plate. If it works on the 6ers then it should on the mark. Don't see a reason why t wouldn't. Your running off the gt ecu or the mark?
__________________
1995 V6 Mustang= Divorced Duals, Flowmaster 2 chambers, NO CATS, Raxiom Halo Projector headlights, Smoked Tails, 17 inch Bullitt Wheels
1997 Mustang GT: 4.6L DOHC http://www.mustangevolution.com/forum/f280/t305270/
1986 Mustang GT= Built 302 SOLD
95v686gt is offline   Reply With Quote
Old 06-19-2012, 05:37 PM   #6
Registered Member
Regular
 
32vNomad's Avatar
 
Join Date: May 2011
Region: Michigan
Posts: 655
Quote:
Originally Posted by AgentOrange
Not trolling, but why not just stick with the 2v iac? BTW I love that you did the Mark swap.
Well the pipe that pops up of the 2v IAC is past the hood line. Not sure what the issue is with the stock style iac valve. But I've tried a new one and still a leak but did hold at 400-450 rpm basically just keeping it from dying. I'm going to look in to a restrictor plate to see if that works. As for the stock ecm yes it is the stock GT but that should have no effect on the fact the iac housing sucks air. I was gonna use a 03 mach but its $70-90 and usually unavalible.
32vNomad is offline   Reply With Quote
Old 06-23-2012, 01:27 PM   #7
Registered Member
Regular
 
32vNomad's Avatar
 
Join Date: May 2011
Region: Michigan
Posts: 655
Re: 02 4v Swap issues.

I believe I have solved the issue. Im using a Mach 1 TB. It is different than the Mark. Though looking almost identical the Mark TB has provisions for the IAC motor build in the TB. Unlike the Cobra and Mach 1 has a output for a hose to be run to the intake tube.
32vNomad is offline   Reply With Quote
Old 06-23-2012, 05:33 PM   #8
Registered Member
Regular
 
32vNomad's Avatar
 
Join Date: May 2011
Region: Michigan
Posts: 655
Update: I was correct if you use a Mark Intake then you have to use its TB.
32vNomad is offline   Reply With Quote
Old 06-26-2012, 08:42 AM   #9
Lorraine's driver

Regular
 
ab_mach1's Avatar
 
Join Date: Feb 2012
Location: Indianapolis
Region: Indiana
Posts: 7,860
Quote:
Originally Posted by 32vNomad
Update: I was correct if you use a Mark Intake then you have to use its TB.
That kinda sucks! Can you get an adequate aftermarket TB made for the Mark engines? Is the Mark TB a dual setup like the Mach1?
__________________
Instagram: @ab_mach1
ab_mach1 is offline   Reply With Quote
Old 06-26-2012, 10:15 AM   #10
Registered Member
Regular
 
32vNomad's Avatar
 
Join Date: May 2011
Region: Michigan
Posts: 655
Yeah the mark tb is almost identical to the Mach. The Marks TB has a provision for the IAC so you don't need a hose fromt the intake to the air inlet pipe.
32vNomad is offline   Reply With Quote
Old 06-26-2012, 11:06 AM   #11
Registered Member
Regular
 
95v686gt's Avatar
 
Join Date: Mar 2012
Region: Kentucky
Posts: 813
Quote:
Originally Posted by 32vNomad
Yeah the mark tb is almost identical to the Mach. The Marks TB has a provision for the IAC so you don't need a hose fromt the intake to the air inlet pipe.
Why not block it off and use the Mach 1 tb with the iac mounted to it instead?
__________________
1995 V6 Mustang= Divorced Duals, Flowmaster 2 chambers, NO CATS, Raxiom Halo Projector headlights, Smoked Tails, 17 inch Bullitt Wheels
1997 Mustang GT: 4.6L DOHC http://www.mustangevolution.com/forum/f280/t305270/
1986 Mustang GT= Built 302 SOLD
95v686gt is offline   Reply With Quote
Old 06-26-2012, 07:43 PM   #12
Registered Member
Regular
 
32vNomad's Avatar
 
Join Date: May 2011
Region: Michigan
Posts: 655
Re: 02 4v Swap issues.

Quote:
Originally Posted by 95v686gt View Post
Why not block it off and use the Mach 1 tb with the iac mounted to it instead?
The Mach TB does not have the IAC on the throttle body.
(Mach 1)

(Mark VIII)


Notice how the Mark has the holes in the bore. That is for the IAC. She's all fixed now and looks stock.
32vNomad is offline   Reply With Quote
Reply

Lower Navigation
Go Back   Mustang Evolution > 1979-2015 Mustang GT || Tech and Talk > 1996-2004 Mustang GT

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


» Like Us On Facebook



02:26 AM


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0

MustangEvolution.com is in no way associated with or endorsed by Ford Motor Company.