2002 Chevy Suburban idling rough in park and at stop lights.
I've recently put some fuel treatment in my suv but forgot to fill up afterwards and drove fuel to empty. My suv now idles rough and my check engine light came on. I've already had my plugs and wires replaced and filled up on fuel and it still does the same thing. What could the problem be???? Help please
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Re: 2002 Chevy Suburban idling rough in park and at stop...
The computer might have set up to a bad mix from the fuel additive or could have damaged the ox sensor .remove the battery terminal for 5 min replace and see what happens , worth a shot before you spend out money
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It could be something as small Such as plugged fuel Injectors. Run a bottle of fuel injector cleaner (I use Lucas Fuel Treatment) Through the system and fill your tank with a higher grade gas and it should improve...
if you've replaced spark plugs and wires lately, try simply running lucas fuel treatment to your gas, it may be an injector may be clogging or dirty injectors period. if that does'nt work, try replacing the idle control sensor. does it start and die sometimes on it's own? idle rough sometimes? that points to several things, like bad egr valve, is check engine light on?or bad idle control sensor, may be a bad gas cap lid even. if the fuel pressure coming from fuel pump isn't right it will not preform right at all. at least this are some points to look for hope i helped and thanks for choosing fixya.com
If it does not do it in park or neutral, it could be a number of things. One being a sticking Torque Converter Clutch solenoid (TCC). It could be that it needs a simple tune-up. How often does this problem happen?
I would check the IAC or idle air control valve located in the throttle body of the engine. It looks like a big nut with black plastic in center and a wire on it. They get gummed up with carbon and become erratic remove and spray with carb cleaner. hope this helps please rate me