Vacuum leak

[BurNrubR]

any suggestions on the best way to track down a vacuum leak? Can't get my iac numbers below 80 and my fuel pressure doesn't change a bit when vacuum line is connected to it or not. So I am guessing I have one.

 

[Frederickdav]

I would just start checking all the vacuum lines. One at a time and see if any are cracked or not on right. Good luck!

 

[Shawn N]

That hard plastic vacuum line that is behind the manifold going to the heater valve would be my first suspect if you can't hear the hissing.

 

[earlbrown]

If there's suction on the hose for the FPR and you don't see a drop in pressure you have a fuel system problem. If there's no suction at idle I'd be checking the soft hoses on both side of that hard line.