Questions & Answers for: Ford Bronco vacuum leak

...vacuum ports, the idle speed will change if u hit a leak, as far as the EGR valve goes see if it gets hot at idle, if it does it is leaking, if all checks ok replace the O2 sensor, but i suspect u ...

...vacuum hoses are suspect. The plastic ones break, the rubber ones crack and leak. There is a specific one to the transmission to control shifting, usually. Some vehicles have a modulator valve on the ...

...it would run a little rough. I have to add as a nov2771 tell you to do. There is more to check: 1.Vacuum leakage. Check the mounting bolts/nuts at the carburetor or trotthle body and intake

...vacuum leak somewhere inside the dash or possibly under the hood, on the firewall on the passenger side. They can be hard to find. Vacuum actuators control the air flow, if a line is leaking the ...

engine surges(idles up and down) before it warms up...usually about 10 mins this can be due to a vacuum leak check your vacuum lines or it may be an intake manifold leak.

...it. 1 goes to air pump, 1 goes to exhaust, 1 goes to catalitic converter, 1 to air cleaner. also 1 vacuume line from manifold vacuume 15" vacuume or better. If vacuume diaphram is ruptured or

...replaced Map sensor, TPS, IAT sensor, O2 sensor, and spark plugs but no solution. I can't find any vacuum leaks. Spraying ether around hoses doesn't change the rpms. check that there is no fuel in ...

...and might pull the EGR valve off and inspect. If the EGR sticks open slightly that would make a vacuum leak. I have seen both intake gasket on 5.0 and the 5.8 do this as well as an old EGR

vacuum leak. Most of the 302's of this vintage we get in the shop are suffering from a vacuum leak causing poor idle or surging. To do this, start the engine and allow it to warm to normal temp. Then,

...Shop Manual, or by searching the Internet. The vacuum routing under the dashboard is fairly straightforward, though, and you should be able to trace the existing lines (if you're looking for a