Intermittant vacuum leak?

Mrgreen94gt

SIMMA DA NA!!!

Founding Member

Jul 16, 2002

448

0

0

West TN

Sep 9, 2004

#1

• Sep 9, 2004

• #1

The car behaves fine for a while, but starts loping and missing at low speed like it has a bad vacuum leak. Seems to only do it after it's warmed up. Any ideas, it's driving me nuts.

 

TrueBlue95GT

Member

Sep 29, 2003

966

0

16

Connecticut

Sep 9, 2004

#2

• Sep 9, 2004

• #2

You probably have a vacuum leak somewhere. Get a vacuum gauge and check to see if the vacuum is bouncing around or low.

 

Mrgreen94gt

SIMMA DA NA!!!

Founding Member

Jul 16, 2002

448

0

0

West TN

Sep 9, 2004

#3

• Sep 9, 2004

• #3

Is it normal for it to come and go? Everytime I've had a vacuum leak in the past, it was just there all the time.

 

mo_dingo

20+ Year Stangneter

Aug 26, 2003

3,031

2

58

Tucson, AZ

Sep 9, 2004

#4

• Sep 9, 2004

• #4

Mrgreen94gt said:

Is it normal for it to come and go? Everytime I've had a vacuum leak in the past, it was just there all the time.

Click to expand...

No, that isn't normal. Vacuum leaks don't come and go. They should always be there. If you suspect a vacuum leak, get a vacuum gauge, and check it out anyway. It might lead you to a leak anyway (I doubt it though).

Have you ran the codes yet? Have you tried cleaning your MAF/IAT sensors? Checked the plugs (color/shape)?
Scott

 

Mrgreen94gt

SIMMA DA NA!!!

Founding Member

Jul 16, 2002

448

0

0

West TN

Sep 9, 2004

#5

• Sep 9, 2004

• #5

mo_dingo said:

Have you ran the codes yet? Have you tried cleaning your MAF/IAT sensors? Checked the plugs (color/shape)?
Scott

Click to expand...

I was thinking about that today. I'm gonna run codes as soon as I can. I took the Mac intake piece off to change the couplings, which didn't work because I stupidly bought couplings that are a tad too small. The thing was such a PITA to put on last time, I've decided to do something different there. May as well inspect that stuff while it's out.