[guntek18]

HEY GUYS,
i did a code scan of my 95' cobra and got a #33. EGR malf.
can anyont tell me how the computer can see that it is failing and does it mean that it is sticking closed or open??????? thanks also if i put a vac. pump on it ( to test it) what should my EGR be doing??
thanks again.

[delarosa121903]

don't really know how the computer knows when its bad. If you do a vaccum test on the egr, it should hold vaccum, if not, the reading on the gauge will decrease meaning the valve has produced a leak. also if you push the valve up, it should come down with ease. if not, its sticking.

[guntek18]

Thanks "D"
I was beginning to think that this is another problem i would have to figure out , myself. Now i'm just curiuos as to why its(the egr) only on one one side of the motor and not both sides.

[JSTANG94]

I have the same code and was wondering if you had an idle surge at all like I do? Were you able to fix the problem? I'm planning to take out the EGR valve and clean it to see if that can't do the trick before replacing it.

[delarosa121903]

mine had the same so i cleaned up the egr valve, throttle body,Mass air flow and the Idle control valve. it seemed to help, which one, I don't know.
Mustang Basic Maintenance and Technical Articles

[guntek18]

"jstang",

I never really had any problems other than poor gas mileage. you see, i put a set of headers on my car, then i took off the down-tube that would normally connect the header to the egr and capped both ends.. The reason i have'nt replaced it yet is because i'm planning to install a "phenolic spacer" ( iether 1/2 inch or 1 inch thick) that will raise my upper manifold hieght wich will require a longer down tube. i have new "high temp" tubing but have not ordered the spacer yet.. have you checked your IAC ( idle air controll) valve??