cant find vacum leak

[sheff2720]

ive had a vacum leak for about 2 weeks now, and i cant seem to find it.. any sugestions on where to look or how to find it? its been annoying the hell out of me that i cant seem to find where it is.. thanks

 

[jrichker]

Have you used a vacuum gauge to find if you have low vacuum? What is happening that makes you think you have a vacuum leak?

 

[sheff2720]

Have you used a vacuum gauge to find if you have low vacuum? What is happening that makes you think you have a vacuum leak?

i havnt used a vacum gauge because i dont have one.. but the car idles real bad and surges alot between 1000 and 500

 

[mgbgt]

with the engine running, take a can of starting fluid or carb cleaner and spray a little bit around your intake, vacum connections ect. when your rpm goes up this will put you in the area of your leak. just make sure you spray a little at a time.

 

[jrichker]

i havnt used a vacum gauge because i dont have one.. but the car idles real bad and surges alot between 1000 and 500

Idle problems are common with Mustangs, and are not always due to vacuum leaks. Do a search on surging idle and you'll find info on TPS setting and cleaning the IAB & throttle body.

Till then, dump the codes and see what the computer says is wrong…

Here's the link to dump the computer codes with only a jumper wire or paper clip and the check engine light, or test light or voltmeter. I’ve used it for years, and it works great.

See http://www.troublecodes.net/Ford/
OR
See http://www.dalidesign.com/hbook/eectest.html for more descriptive help
OR
See http://www.mustangworks.com/articles/electronics/eec-iv_codes.html

 

[sheff2720]

Idle problems are common with Mustangs, and are not always due to vacuum leaks. Do a search on surging idle and you'll find info on TPS setting and cleaning the IAB & throttle body.

Till then, dump the codes and see what the computer says is wrong...

I have the TPS set at .95 and its a brand new throttle body and IAB, i'll check for codes tomorrow.. thanks

 

[dastang2]

you could also have a vacuum leak under the dash