Help, My 5.0 acts like it's Carbed

Stang2Man

Founding Member

May 16, 2000

363

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17

In the Hood of Newbern Beyotch

Mar 23, 2004

#1

• Mar 23, 2004

• #1

For some odd reason, when I crank my 92 GT up on a cold start it acts like a Holley in the winter and wants to stall out and die. I've got to keep it revved up until the engine warms up to regular temp then it'll run smooth. I was thinking maybe TPS? but if anyone else has had issues like this please I'm open for suggestions, since the Ranger isn't as fun or noisy to drive as the GT is. BTW, bone stock motor with 181K on the clock.

Thanks for any help guys.

 

joncash

just high enough to be functional

Founding Member

Dec 9, 2000

756

4

39

The USA's peen

Mar 23, 2004

#2

• Mar 23, 2004

• #2

Probably the IAC not working, it's suppesed to keep the revs up for a little while when the car first starts up cold to keep it from stalling out. Mine acts the same way because I had to unplug the IAC motor.

 

Stang2Man

Founding Member

May 16, 2000

363

0

17

In the Hood of Newbern Beyotch

Mar 23, 2004

#3

• Mar 23, 2004

• #3

what exactly is the IAC, i don't have my chiltons handy at the moment to see where/what it is. And how much trouble would it be to replace it? Will it throw a code if I plug a tester in? No check engine light right now since the bulb was removed by previous owner after installing a No-Cat H-Pipe.

 

Anaconda

Founding Member

Aug 13, 2000

107

3

19

Memphis, Tn

Mar 23, 2004

#4

• Mar 23, 2004

• #4

I'm having the same problem with my 89 GT, hopefully someone can help. I will check the IAC, but wouldn't the check engine light come on? Stangman where are you located? I'm in Memphis.

 

S

sublime29

New Member

Mar 18, 2004

110

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0

Mar 23, 2004

#5

• Mar 23, 2004

• #5

It could be the ect.Run a code scanner the check engine light doesn't always come on for certain sensors.I had bad sensors with no check engine light.Always fix the codes in order.

 

85 Coupe 5.0

Founding Member

Dec 18, 2001

817

2

16

Kansas

Mar 23, 2004

#6

• Mar 23, 2004

• #6

HEY, what's wrong with a carb? just messin with ya, although.....

I have never had a problem with my Holley, even when it was around 10 above this last winter. 1 half pump to the floor and it would fire within 2 revolutions of the motor, and run at a nice brisk pace untill she was warm.

 

Mavrick

Founding Member

Aug 29, 2002

2,264

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46

Collingwood, ON

Mar 23, 2004

#7

• Mar 23, 2004

• #7

Stang2Man said:

what exactly is the IAC, i don't have my chiltons handy at the moment to see where/what it is. And how much trouble would it be to replace it? Will it throw a code if I plug a tester in? No check engine light right now since the bulb was removed by previous owner after installing a No-Cat H-Pipe.

Click to expand...

The IAC is the cylinder that hangs off of your TB. It allows air into the motor while its cold, preventing it from stalling out.. try cleaning it with carb cleaner first, you can reuse the old gasket. If that doesnt help, try replacing it.

 

joncash

just high enough to be functional

Founding Member

Dec 9, 2000

756

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The USA's peen

Mar 25, 2004

#8

• Mar 25, 2004

• #8

Yeah sorry about the lack of info , it stands for Idle Air Control. It's about 5 inches long, half aluminum and half black plastic with a two-wire plug attached to it and is fastened with two hex-screws to the throttle body.