1999 Ford contour EGR valve

Question

Would a bad egr valve make a car idle rough?? I think my car have a bad egr valve because at idle, my car makes a hissing noise until i put my foot on the accelerator.

Answer 1

probably have a busted pcv valve hose, check for vac. leaks first

Answer 2

the EGR wont cause a hissing noise, if the EGR was bad, there would be a slight stumble off the line, or rough idle. a hissin noise seems like a vacuum leak somewhere. open the hood when the car is running and see if you can hear where the hissing is coming from. it may be coming from a line somewhere.

Answer 3

the egr valve can cause the engine to run rough. most likely the hissing noise is from a vacuum leak. if you cannot find the leak by looking and hearing it. try using a propane torch on it with out lighting the torch. when you get near the leak with the gas the rpm's will raise and you can then pinpoint the leak source and repair it. other than that take it to a reputable garge and let them repair the problem.

Answer 4

vacuum leac on iac hose ,,they crack causing a leak and creating the same symtom that you have,,check under the intake manifold,the hose should be 1/2 in size