Idle Problems.. new thread for problems

9

91foxbod50

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Sep 26, 2007

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Oct 6, 2007

#101

• Oct 6, 2007

• #101

Im thinking more of the cts, I had that problem with my trans am. It tricked the computer into thinkin it was cold when it really was hot. I havent read all the reply's so i dont know exactly where your at.. but i'd pull it out and take a look at it anyways. you could possibly have a short in the wire somewhere or maybe a bad sensor

 

jrichker

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Oct 6, 2007

#102

• Oct 6, 2007

• #102

savegoodautonfg said:

jrichker said:

Can i just get a replacement harness?

Click to expand...

Yes, but it may be expensive and/or hard to find.

Click to expand...

 

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savegoodautonfg

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May 11, 2005

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Oct 6, 2007

#103

• Oct 6, 2007

• #103

jrichker said:

savegoodautonfg said:

Yes, but it may be expensive and/or hard to find.

Click to expand...

what is it called?

Click to expand...

 

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savegoodautonfg

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Oct 9, 2007

#104

• Oct 9, 2007

• #104

jrichker said:

savegoodautonfg said:

Yes, but it may be expensive and/or hard to find.

Click to expand...

what is it called?

Click to expand...

 

jrichker

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Oct 9, 2007

#105

• Oct 9, 2007

• #105

It is the main EFI body wiring harness. See the digaram for what a typical 5.0 fox Mustang EFI body harness looks like. You will see that it connects to almost everything under the hood.

Diagram courtesy of Tmoss & Stang&2birds


See the following website for some help from Tmoss (diagram designer) & Stang&2Birds (website host) for help on 88-95 wiring http://www.veryuseful.com/mustang/tech/engine/

Ignition switch wiring
http://www.veryuseful.com/mustang/tech/engine/images/IgnitionSwitchWiring.gif

Fuel pump, alternator, ignition & A/C wiring
http://www.veryuseful.com/mustang/tech/engine/images/fuel-alt-links-ign-ac.gif

Computer, actuator & sensor wiring
http://www.veryuseful.com/mustang/tech/engine/images/88-91_5.0_EEC_Wiring_Diagram.gif

Fuse panel layout
http://www.veryuseful.com/mustang/tech/engine/images/MustangFuseBox.gif

Vacuum routing
http://www.veryuseful.com/mustang/tech/engine/images/mustangFoxFordVacuumDiagram.jpg

 

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savegoodautonfg

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Oct 9, 2007

#106

• Oct 9, 2007

• #106

Jritcher, can you possibly circle on that diagram where exactly i have to check the wiring at?

 

jrichker

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#107

• Oct 9, 2007

• #107

Split the harness open in the area of where connectors, 20,21 & 29 join the main harness. The splice for the black/white signal ground should be in that area.

 

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savegoodautonfg

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Oct 16, 2007

#108

• Oct 16, 2007

• #108

i let it stick today and popped my hood and disconnect TPS and idle went down and i reconnected it and it was'nt sticking after being reconnected.

 

jrichker

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Oct 16, 2007

#109

• Oct 16, 2007

• #109

savegoodautonfg said:

i let it stick today and popped my hood and disconnect TPS and idle went down and i reconnected it and it was'nt sticking after being reconnected.

Click to expand...

You have just given more proof of a TFI signal ground problem. Try using a DVM to check the TFI voltages next time it happens.

 

ninety15.0

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Oct 16, 2007

#110

• Oct 16, 2007

• #110

Dude...i checked in on this thread about a month ago. Jrichker is one patient man helping you out like this. this thread makes me wonder if you even look at the links he gives you. Its all right there...just read the stuff and fix the problem. There's only so many things it could possibly be! Those diagrams are awesome and very detailed....and in COLOR. shouldnt be that hard to follow his instructions and do some testing/diagnosis by yourself.

You will never learn how to diagnose/fix car problems if you ask someone to hold you hand the whole time.

 

baldy1

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May 5, 2005

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Oct 16, 2007

#111

• Oct 16, 2007

• #111

Have u pulled any codes yet. If you have what are they.Also the MAF the TB and the injectors have to match. That will confuse the computer. What lb injectors are you running.