A vacuum leak on a 1999 Ford Ranger can be located using an automotive stethoscope. It can then be move around the engine to detect the sucking noise of a leak.
There is a heater control valve on the 1999 Ford Ranger. There is no thermal vacuum valve on this year of the vehicle.
where can i find a vacuum line diagram for 1989 ford 2.9 liter engine
You have a 1999 Ford Ranger 3.0.
autozone.com has free online manuals
How do you remove the flywheel on a 1999 ford ranger
Owner's manual, or Library.
is there a recall on the timing belt on a 1999 ford ranger?
VACUUM-diagram FORD 2.9 l V6
You can view the 1999 Ford Ranger Owner Guide online at : www . motorcraft service . com ( no spaces ) Click on Owner Guides
It sounds like you have a vacuum leak from either a vacuum hose or a leak or crack in your intake. Check for hissing sounds.
What is a a/cl dv on a 1992 ford ranger xlt vacuum line
There are many vacuum hoses on a 1999 zx2. They all originate at the intake plenum. Backtrack from there to find the one you want.