This is topic 2002 powerstroke vacuum leak? in forum Tech Talk at Northern California Ford Owners  .


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Posted by 2Coupes (Member # 5617) on :
 
i have a 2002 f250 7.3 liter.
when i let the truck idle for a few minutes the rpms go from normal 6-700 range to about 1000. and i hear a hissing noise, it sounds like its coming from the pass side of the motor. if i hit the gas pedel or tap the break pedel the idle drops back to normal. everything eles seems fine and the truck runs great.
any help would be great thanks guys [patriot]
 
Posted by fasthatch (Member # 7277) on :
 
it would be really hard for a powerstroke to have a vacuum leak
 
Posted by 2Coupes (Member # 5617) on :
 
Ok it's my first diesel, but when I here that noise on my stang I know it's a vac leak.
 
Posted by blown95svt (Member # 8893) on :
 
The only vacuum on that truck is an a storage tank that has an electric pump. Used for ac, and auto lock 4x4 hubs. Sounds like you have a silicon coupler leaking boost. Common for those trucks. Gotta clean the coupler and get the oil off before installing or it will just blow off. Pm me if ya need and more info.
 
Posted by acmikee (Member # 5568) on :
 
mine does the same thing untill it warns up. so i wouln't worry it.
does it have a chip? if not put one in along with an airraid filter system.....
 
Posted by 2Coupes (Member # 5617) on :
 
Ok I'm gonna check that on the turbo this weekend. seems like it could be that! Yes it has a programer the edge I think
 




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