Iac Vavle

EllyGT

Member

Mar 28, 2015

25

3

13

Florida

Apr 20, 2015

#1

• Apr 20, 2015

• #1

Hello All
I have a question. Still learning about my mustang. The IAC valve went bad, it was 14 years old, can't complain. Got a new one from napa, it was bad right off the bat. Traded it out for another one, that was more exspensive. It is 2 months old and it has gone bad. My question is : if it is getting the correct voltage, is there anything else that can cause it to go bad? I ask because when I called napa, I asked for my money back and he said he couldn't do that cause it is an electrical part! I asked, " and what if this one goes bad?" , He said there would be another problem causing it. Is that true or is he just blowing smoke up my @$$ cause I'm a girl.
Thanks y'all

 

wmburns

SN Certified Technician

Aug 14, 2009

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Houston Texas

Apr 20, 2015

#2

• Apr 20, 2015

• #2

EllyGT said:

My question is : if it is getting the correct voltage, is there anything else that can cause it to go bad?

Click to expand...

^^^Yes. Excessive blow by.

What is the status of your PCV system?

 

EllyGT

Member

Mar 28, 2015

25

3

13

Florida

Apr 20, 2015

#3

• Apr 20, 2015

• #3

wmburns said:

^^^Yes. Excessive blow by.

What is the status of your PCV system?

Click to expand...

recently had the valve covers off to change the timing cover, didn't notice alot of oil up in the pcv valve. seems in good condition.

 

wmburns

SN Certified Technician

Aug 14, 2009

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Apr 21, 2015

#4

• Apr 21, 2015

• #4

You must either be very unlucky with regards to buying new "bad" parts or maybe there's something else going on?........

Here's some information on how to trouble shoot IAC/idle issues. This might point you in a different direction.

Troubleshoot IAC idle problems 1996-2004 | Mustang Forums at StangNet

 

Reactions: trombonedemon

EllyGT

Member

Mar 28, 2015

25

3

13

Florida

Apr 21, 2015

#5

• Apr 21, 2015

• #5

Thank you for the read. Napa did give me a new one, it's on, working fine. But I am going to look into some of those possibilities. I'm kinda hoping it's that I am unlucky in buying bad (new) parts! But I really do appreciate the link and the help, very informative, if not a little over whelming. But I shall push on. Thanks again!

 

trombonedemon

Well-Known Member

Jun 25, 2009

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U.S.A, U.S.A., U.S.A.!

Apr 22, 2015

#6

• Apr 22, 2015

• #6

wmburns said:

^^^Yes. Excessive blow by.

What is the status of your PCV system?

Click to expand...

Right on the money!!!

If you have gunk going back into the engine, the little worm gear inside gets to working harder, sometimes you can hear it whine, the IAC valve that is. If the rings on the engine are going, the fumes are gonna mix with the oil and create a nasty homogenous mix. Ick!!!! that will kill an engine slowly.

Answer: Catch can. Works wonders for engines with excessive blow-by. And turbos. You can make your own. Do your research! Save your self some time before an engine rebuild.

 

EllyGT

Member

Mar 28, 2015

25

3

13

Florida

Apr 22, 2015

#7

• Apr 22, 2015

• #7

I want to say thank you for your help and advice! I want to pursue and figure out the problem,make it right! This is my first mustang and I love her! But the husband is being skeptical and says that if it is blow by that it's not worth putting an engine in, and would rather me get rid of her and get another car! So please tell me where to look for how to do a catch can,till I can afford to get another engine, if that is the problem! Thank you again very much!

 

wmburns

SN Certified Technician

Aug 14, 2009

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Houston Texas

Apr 22, 2015

#8

• Apr 22, 2015

• #8

Are you aware that for the 2000 model year and older V6's there's a problem with the oil control baffles in the valve covers? For the 2001+ model years Ford redesigned the PCV valve cover oil baffles to reduce the amount of oil entering the PCV system? The excessive blow by may not mean there's any problem with the motor but instead be a problem with the valve covers.

Or use PCV catch can. Which many people just use an inline filter. Google search there are tons of examples.

 

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EllyGT

Member

Mar 28, 2015

25

3

13

Florida

Apr 23, 2015

#9

• Apr 23, 2015

• #9

Is that the same for the 4.6 SOHC ? Cause that it the motor i have.

 

wmburns

SN Certified Technician

Aug 14, 2009

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Houston Texas

Apr 23, 2015

#10

• Apr 23, 2015

• #10

EllyGT said:

Is that the same for the 4.6 SOHC ? Cause that it the motor i have.

Click to expand...

No. Sorry I got confused which section I was working in. An inline filter is the only real option for the 4.6.

FWIIW, it's very easy to acquire replacement 4.6 Modular motor. A replacement motor does not have to come from a Mustang. The long block is the SAME for the 2001+ model years Crown Vic, Grand Marquis, and Town Car (Ford Panther). There are TONS of the modular 4.6 that can be had for reasonable $$'s. I paid only $800 for a 30k mile Grand Marquis motor currently in my Mustang.

Tons of people have done the Windsor to Romeo swap (including myself). Google search. If a motor swap is within your skill set, it might be short sighted to scrap/sell an otherwise clean/solid car because of a bad motor.

However, IMO it't much too early to say that your motor needs replacing. There's still tons of trouble shooting needed to confirm the reported problem. Consider a compression test and cylinder leak down.

Good luck.