I searched but couldn't find an answer. I have an 03' Rubicon and after driving around for a few minutes, if I turn it off to go in the store or something and get back in and start it up, it idles as if it is flooded really bad, this only seems to happen in the warmer months if I've had the A/C on. Any suggestions on what to check or replace first?
Curious about this myself as sometimes mine will behave similarly. Especially if I only shut it off for a short time, it idles rough for a minute or two, then smooths out....
Exactly what mine does, but it seems to worst this summer, than last summer! If I wasn't selling my house and could park in the garage at night, then I wouldn't have a problem because I usually only have the bikini top on and no doors!
Not sure how long you have had the engine running when it does this but it could be because it is running rich as if the choke is on for the cold start up. It would be the computer doing this and the same thing happens on my car if I start it and then shut if off after running for a few minutes. They just need to warm up and then the computer will adjust the fuel mixture to lean it out.
Exactly what symptom are you having that you are describing as it appearing to be "flooded"? Just the rough idle?
That's the best way I could describe it, when I restart it, it acts as if is flooded, kinda like an old car with a carburetor! After I get it started, I can then pat the gas a few times and then hold it to the floor for a few seconds and it will clear up!
There again this only happens if I have to have the top and doors on and run the A/C.
I'm thinking the fuel rail is not completely filled with gasoline which is causing one or more of the fuel injectors to be starving for fuel that will cause a misfire. If this problem gets worse the longer the Jeep sits, the most likely cause of that is a defective anti-drainback valve that is inside the fuel pressure regulator that is mounted onto the top of the fuel pump. You have to drop the gas tank to replace the fuel pressure regulator which you can find at RockAuto Auto Parts for $90 or so.
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