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I have a 2000 Toyota Tundra pick up with a V-8, automatic transmission. I have an idle problem with the air conditioning OFF. The vehicle idles too low and may shut off. It will restart with no problems. With A/C on idles with no problems. I have no warning lights or engine faults indications any time during this problem. Vehicle has high road miles about 190K.

1) Cleaning the "throttle body" with a throttle body cleaner and a soft cloth ONLY! 2) Be sure that you clean the “Idle Air Control Valve” that is located under the Throttle Body with the aerosol “Throttle Body Cleaner” 3) To clean the “Idle Control Valve” Spray the cleaner in the small hole that is located inside the throttle body that goes to the Idle Control Valve. If this does not "help" your problem then you may have a problem elsewhere. If it helps for a while, then starts to act up again. Look into changing the Idle Air Control Valve. It controls the idle by controlling a "vacuum leak". After they get as many miles as yours, they just get tired and may "act stupid" and cause the problems you are describing. Dear James, I am working on a 1993 thunderbird 3.8L. I replaced the driver’s side head gasket. My problem is the car starts fine and will run at 1500rpm and higher, but either idles very low and rough or just stalls out. Would this be a vacuum leak on the intake manifold? Also the fuel pump quit and had to be hard wired to the fuse box, could not get any power to the pump. Could this be causing the rough or no idle due to the computer not finding a fuel pump?

 

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