1987 Thunderbird turbo coupe wont idle - Ford Mustang Forum

LinkBack Thread Tools
post #1 of 3 (permalink) Old 03-17-2011 Thread Starter
gtconv2's Avatar
Joined: Nov 2007
Location: Midwest
Posts: 56
1987 Thunderbird turbo coupe wont idle

i just bought an 87 turbo coupe it still has the ihi turbo, when i got it the turbo and the intercooler were off the car. needless to say i put it all back together but now when i start it it wont idle. i can give it gas and keep it running but if i let off the gas around 1000 rpms it just dies. I am fairly sure its a vacuum leak but i dont have a diagram to go off of. I need a vacuum diagram for the turbo or one for the entire engine would help as well.

also ive replaced the cap and rotor, the plugs and wires, fuel pump and fuel filter, and the ignition control module and the cat converter. if any one has any suggestions it would be much appreciated

87 gt t-top
gtconv2 is offline  
Sponsored Links
post #2 of 3 (permalink) Old 03-17-2011
2.3L Member
mg man 75's Avatar
Joined: Jan 2008
Location: Elkhorn
Posts: 4,593
First like said probably vac leak. The pcv valve needs to be a Ford only one. The others leak thru. The IAC on the 2.3 goes bad quite often. Can clean. Carb cleaner not brake cleaner.
Check the EGR valve for leak thru. Can cause bad idle.
The throttle position sensor needs set at approx .95 volts at idle give or take a little
Look at hose from vam to turbo needs spring in it to prevent collapse and no holes in it.
I assume looked at turbo to intercooler couplers. Sometimes they have holes or not put on correct. No insult meant putting that intercooler on bottom one can slip and you not see it.
Compression test or leak down test. The 2.3 turbo is bad about blowing headgasket. Mostly between #3 and #4 cylinder. If so check head for cranks.
Now for vacuum diagram.
New Page 1
Lot of good tech on there faq and tech pages.
NATO - North American Turbocoupe Organization
Always could make a boost tester. I have a front mount intercooler. I thought leak free until I made one and found several. Keep the psi below 10psi. The thing will come off and if so please get out of its way. I didn't. No harm done. I was very lucky.
IC Pipe Tester
Hopefully I hit it somewhere if not just ask. One of us should help you out. Maurice

1989 Mustang 2.3 turbo, rebuilt SVO motor, 88 computer,vam upgrade, adjustable boost control, intercooler, c-4 trans, 7.5 345 turbocoupe rearend, motorsport driveshaft, Black interior.


Last edited by mg man 75; 03-17-2011 at 07:52 PM. Reason: added more
mg man 75 is offline  
post #3 of 3 (permalink) Old 03-18-2011 Thread Starter
gtconv2's Avatar
Joined: Nov 2007
Location: Midwest
Posts: 56
thanks that was very helpful, i actually got it running correctly without the diagram, now the problem is that under driving the car wont rev past 3500 rpms, is that a common problem? ive replaced the fuel pump the fuel filter and nothing changes the way it runs. some people have told me it could be an injector but im not sure, it will rev fine when im not driving, also ive heard fuel pressure regulator

87 gt t-top
gtconv2 is offline  
Sponsored Links

idle , issue , svo , thunderbird , turbo

Quick Reply

Register Now

In order to be able to post messages on the Ford Mustang Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a VALID email address for yourself, otherwise you will not receive the necessary confirmation email needed to confirm, validate and activate your new AFM member account.

Failure to provide a VALID email address, will result in the cancellation of your new AFM member account registration.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Posting Rules  
You may post new threads
You may 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 Off
Refbacks are On

For the best viewing experience please update your browser to Google Chrome