Can someone tell me some tips on finding vacuum leaks or methods that i can do to find it easier.. i have put new gaskets on the EGR tube and it was idle at 4000 but now i got it to 2000... Someone tell me some more things that i could reduce the idle on it Thanks

Theres a metal tube that runs from the TB to the manifold (Idle Air Circuit). Where it connects to the manifold, there is a rubber hose - this hose gets old and leaks. Also look at all the plastic vac lines that run under the manifold. Make sure that your TB is tight - this can get loose and leak. Look at every vac line connection. Lots of small rubber elbows & tees that dry rot and leak plus the vac lines tend to split. Hard to see but will cause a leak. When the motor is cool, at first start, you can spay starting fluid around the vac lines to see if the idle picks up. This will give you a general idea of where the leak is. Not recommended on a hot engine. There are a few vac lines on the cruise control and vac canister.

I fyou clean a vacuum line and roll it between your finger and thumb and your finger or thubb get dirty then it needs replaced

quote Originally posted by LitebulbwithaFiero: I fyou clean a vacuum line and roll it between your finger and thumb and your finger or thubb get dirty then it needs replaced

I dont subscribe to that particular test, just because rubber gets a little surface prosity or holds some grease, doesnt mean it can leak air, thats actually a good thing, they break when they get hard and brittle.

At 2k, you have a significant, but not giant leak. Check the IAC tube, its a black 1/2" tube coming out of the back of the TB. Its often overlooked when reassembling.

If you cant find anything, my favorite move is to unhook the PCV vac line, then hook that port to an air compressor, regulated down to <5PSI. Block off the TB with something round (cat litter caps work great) and pressurize the engine. Then just listen and spray soapy water to find the leak.