2000 chevrolet malibu at and idle it runs good then sounds like it floods...

DReDWENGER

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...out, but then comes back...? Run it for about 5 minutes, Runs fine then its almost like its going to die and it revs way up and then back to an idle. Happens year round. Note: this motor is a regular federal emissions motor and the car was orginal cali regulations vehical. The only differance i noticed is the pump that pumps are into the exhaust ports. Please let me know if if possibly changing the computer to a federal emissions car will work or another fix. Thank you!
Fuel filter, plugs, and wires were replaced with AC Delco products. Not the cheap shit. I will check the fuel pressure and air filter this week. But doesn't make sence why it would run great the rest of the time and only do this one time... everyday.
 
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