help for tomorrows work with the mustang!

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stangbang302

New Member

Jul 13, 2007

180

0

0

fort valley, ga

Dec 26, 2009

#1

• Dec 26, 2009

• #1

alright so i just built my coupe. i put everything together and started it up. well it just dies instantly unless i can keep it revved up. until it warms up a little it will idle just fine. there is a big surge going on until it warms up. so tomorrow all i really established to do is clean the iac and see if that helps with the idle. what do you guys think i should do? btw there are not any vacuum leaks.

 

2BADSTANGS

Member

Jun 19, 2008

385

1

18

Colorado

Dec 26, 2009

#2

• Dec 26, 2009

• #2

What setup you running motor wise?

 

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stangbang302

New Member

Jul 13, 2007

180

0

0

fort valley, ga

Dec 26, 2009

#3

• Dec 26, 2009

• #3

its a pretty mild set up, gt40 heads, cobra upper and lower intake with a 1in spacer, e303 cam, 70mm tb, 73mm mass air, stock distributor except msd cap and rotor, 19lb summit injectors. the motor ran perfect when i had it in my hatch

 

beyondspexj

Member

Oct 30, 2009

265

0

17

Las Vegas

Dec 27, 2009

#4

• Dec 27, 2009

• #4

iac dirty or needs to be adjusted? mine does the same ( stock 302 ) and im assuming thats what needs to be cleaned and/or replaced since i have no vac leaks. I cleaned mine out and now its only every so often, instead of holding the throttle open for a few seconds, i just have to blip it when it dips once after start up and it holds itself. but i think mine is idling to high as well ( about 900-1000rpms )

 

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stangbang302

New Member

Jul 13, 2007

180

0

0

fort valley, ga

Dec 27, 2009

#5

• Dec 27, 2009

• #5

did you check the tps?

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

33

129

Dec 27, 2009

#6

• Dec 27, 2009

• #6

Is the base idle set correctly?
Will it idle without the IAC connected on a hot motor?

You mentioned surging. Does it do this while holding the throttle perfectly steady? I'd want to check for vacuum leaks again.

 

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stangbang302

New Member

Jul 13, 2007

180

0

0

fort valley, ga

Dec 27, 2009

#7

• Dec 27, 2009

• #7

yep i can hold it steady and it would rise up quite a bit.

 

apollo12

New Member

Dec 11, 2007

155

0

0

port st.lucie fla

Dec 27, 2009

#8

• Dec 27, 2009

• #8

Do you have fresh gas in the tank?

 

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stangbang302

New Member

Jul 13, 2007

180

0

0

fort valley, ga

Dec 27, 2009

#9

• Dec 27, 2009

• #9

yep, put about 2 gallons in before starting it up

 

apollo12

New Member

Dec 11, 2007

155

0

0

port st.lucie fla

Dec 27, 2009

#10

• Dec 27, 2009

• #10

Does the tps have a reading around .999? did you pull the dizzy out of the motor?Do you have another computer to try?

 

7upstang91

10 Year Member

May 30, 2008

936

124

74

Florida

Dec 27, 2009

#11

• Dec 27, 2009

• #11

just a clean tune up, and more than likey a tune.