Trying to figure out this car and idle issue.
- Thread starter Ythrashin
- Start date
This is what I started with.
It has the GT hood on it and was hitting the plenum. The IAC was cracked. Bolt was broke off in plenum where they tried to remove the IAC. The plenum also had a crack in it that he said he jb welded.
I replaced the plenum with one i found at a salvage yard, which had another IAC on it.
Had to grind and cut a chunk out of the underside of the hood to clear the plenum.
It has the GT hood on it and was hitting the plenum. The IAC was cracked. Bolt was broke off in plenum where they tried to remove the IAC. The plenum also had a crack in it that he said he jb welded.
I replaced the plenum with one i found at a salvage yard, which had another IAC on it.
Had to grind and cut a chunk out of the underside of the hood to clear the plenum.
Im learning as I go. I need to figure out what kind of transmission is in the car also. Previous owner said it has an 04 GT tranny in it.
I also have been wondering if they used the gt computer or cobra in the swap. Read somewhere that if they used the cobra they wouldve had to of swapped out the fuel pump also. If they used the gt computer it wouldve needed a tune...
Ive asked the PO, but he says he cant remember. Lol
I also have been wondering if they used the gt computer or cobra in the swap. Read somewhere that if they used the cobra they wouldve had to of swapped out the fuel pump also. If they used the gt computer it wouldve needed a tune...
Ive asked the PO, but he says he cant remember. Lol
98snakehorse
Well-Known Member
Which vacuum line are you talking about? In the first photo, there were a few. One goes to your FPR and the other I think goes to your charcoal canister and one goes to your vac line to run your air vents..
98snakehorse
Well-Known Member
That one is heading to your inner passenger fender to the charcoal canister. It cycles out fuel vapors from the gas tank its another part of the cars emissions.
07GtS197
Well-Known Member
Is your car stick or auto? What rear gears do you have? You actually dont need a tune for a 4v swap but it will net you more power. You can pull off the passenger kick panel and get the computer code for us.
I dont think the high/fluctuating idle is from that line. I popped it off and plugged it and the idle didnt improve. Any other ideas?
Perhaps my IAC is bad or MAF?
There is some damage to the inside of the air inake tube but didnt look like any air is getting through. The throttle body was caked with carbon deposits. Cleaned it off really good when i had everything apart. Maybe something wrong with it...
Any idea what that plug goes to in my second pic?
07GtS197
Well-Known Member
Maybe that vac line in the second pic if for the ac blend door. Most likely the trans is not from an 04 because they used a tr3650 which uses a different trans mount and if Im not mistaken uses a different signal for the speedo making the swap difficult. It can be done but I doubt it was done. Maybe theres a tag on it to verify what trans it is.
I wouldnt worry about the computer then. Do you have the stock imrc's? If it doesnt and isnt throwing a cel then you have a gt ecu. If it has the imrc's deleted and there is a cel then you have a cobra ecu.
I wouldnt worry about the computer then. Do you have the stock imrc's? If it doesnt and isnt throwing a cel then you have a gt ecu. If it has the imrc's deleted and there is a cel then you have a cobra ecu.
07GtS197
Well-Known Member
Hmm then it could be swapped who knows. If you can see around the back of the intake next to the firewall you should be able to see a small black plastic control box and a linkage between both banks of intake runners. I know thats not really a good explanation lol but I dont know how else to describe it. You could always take the intake manifold off to be 100% sure.
To make this more convaluted lol I just thought of something. If he swapped computers and didnt swap engine wiring harnesses then it wouldnt have the connector for the imrc's and if there isnt a tune it would throw a code for them.
OP here is a thread I found about some info regarding a tr3650 swap and how to make the speedo work.
http://www.allfordmustangs.com/foru...wapping-t45-tr3650.html#/topics/270828?page=1
To make this more convaluted lol I just thought of something. If he swapped computers and didnt swap engine wiring harnesses then it wouldnt have the connector for the imrc's and if there isnt a tune it would throw a code for them.
OP here is a thread I found about some info regarding a tr3650 swap and how to make the speedo work.
http://www.allfordmustangs.com/foru...wapping-t45-tr3650.html#/topics/270828?page=1
Did some reading. Read if the imrcs are still yhere then im only running on 2Vs. Im thinking my best course of action is to deyerimine if the imcs are deleted, if not delete them. Also, get a cobra ecu and swap it with the gt ecu...
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