Issues with SC, Ran codes, Help appreciated.....

89_Red_Xr7

Registered User
Hey all, This last week I've had yet another problem come up with the Cougar....
after I fixed my alt. problem, I was driving when i felt the engine "bucking", almost like it needs plugs/wires, but the engine stumbles so randomly that i don't think it has anything to do with plug or wires. soon after that, the Check Engine light will come on and the car will run fine after the light comes on, and the car runs just fine at WOT too, It only stumbles under light throttle(vacuum).
After that, i went to AZ and used the code reader they have there and got the following codes....
33. EGR valve closed/ Erratic or has insufficient flow.
13. Cannot control rpm low during self test or idle speed control inoperative.
74. Brake on/off switch not activated

would a code 33/stuck egr valve cause the car to buck and stumble like that? also, is there any way to clean a stuck egr valve rather than replace it? The car idles just fine, even if the a/c and other stuff is on, so I dont think that the idle controls are making the car stumble like it does. Any help would be greatly appreciated in helping me figure this thing out..

Andrew
 
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