Myron

Hey guys...
so i think i have a vacuume leak in my system..whats the fastest way to check it out and locate the issue...

thanx

CrazyEye

Search much?
I guess Ill spoon feed you...

A can of carb cleaner works good, spray it around on suspected vacuum leaks and if the idle changes you have found it.
Also you can..
Take a section of tubing, or rubber heater hose. Put one end to your ear, take the other end and point it at places around the engine. The tube acts like a doctor's stethascope, and magnifies the vaccuum leak sound when you get close to it.
Or....
Using a propane torch. Turn the torch valve on but do not light it and move it around the suspected leaking area. When your idle rises, you have found the leak. You have to be careful, though, as using propane on a running engine is not without risk. If you have a plug grounding to the block, bad wires, etc. this is definitely not recommended. Fix any electrical problems first then give the propane a try.

Myron

thanks, i have a automotive stethoscope, i ill try that..this evening

norcal707

ok, can you give us some details on your problems with your truck....what makes you think you have a vacuum leak?

Myron

surges at the light, just replaced spark plugs, wires and rotor around December 09
i want to replace all the vacuum lines but i think there has to be a leak.

toyota4x4907

could be:
1: Idle too high. Set it below 1000 rpm
or
2: low coolant. The most likely if the idle surges.

or really a combo of both.

Myron

the idler screw is all the way down. Coolant is fine.