What could cause this problem ???

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vpap1

Member

Sep 21, 2009

109

2

19

Oct 13, 2009

#1

• Oct 13, 2009

• #1

1990 mustang gt. Has 99 k, has edelbrock intakes, cold air intake, BBK headers, Flowmaster H pipe and mufflers. T 5 tranny

What could cause this problem , three vids 5 min total , checked tps, ect, acs, maf, aic everything. I need help. Also do you think its cammed, car came with no papers....

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YouTube - 1990 Mustang 5.0 Cold Start 1 #1
YouTube - 1990 Mustang 5.0 Cold Start 2 #2
YouTube - 1990 Mustang 5.0 Cold Start 3 #3

Thank You

 

1993SSP

Founding Member

Sep 5, 2001

1,194

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Ky

Oct 13, 2009

#2

• Oct 13, 2009

• #2

I had the same problem once, it turned out to be the IAC on the front of the throttle body, you can take yours off, there will be 2 round holes, you can trim the part out of the gasket or grind down the metal between the 2 holes and see if that helps, it solved my problem.

 

Repostyle

Member

Jun 11, 2005

538

0

16

Portland, OR

Oct 13, 2009

#3

• Oct 13, 2009

• #3

I had the same problem with my 91. Turned out to be a simple fix, I had left a hose clamp loose on the air intake between the TB and the MAS. It was tricking the computer into thinking it was getting a certain amount of air when it was actually getting a lot more and was too rich to run cold. Don't overlook the small stuff because it could be as simple as that.

Where's the idle at when warm? Just over 500 rpm is ideal, 700 rpm is starting to get a little high but acceptable if it solves your cold start issues.

 

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vpap1

Member

Sep 21, 2009

109

2

19

Oct 14, 2009

#4

• Oct 14, 2009

• #4

when it settles down it sits at 750-800. Check out the last vid .. also she may have a cam because when it sits at 750 she rumbles a bit

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KyleEBK

Member

Jan 27, 2008

173

5

19

Oct 14, 2009

#5

• Oct 14, 2009

• #5

mine does soemthin like that it kinda rumbles and goes between 700 and 950 rpms or so i dont think much of it

 

C

cheese_05_70

New Member

Aug 29, 2005

58

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IL

Oct 15, 2009

#6

• Oct 15, 2009

• #6

Posted via Mobile Device

check your codes im assuming you took out your check engine light because i didn't see it in the video