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I have a 2004 impala its starts and runs fine until it gets warm then it dies I replaced plugs wires and the IAC valve its still doing the same thing fuel pressure was good when we tested it last night Idk what it could be its got me and my buddy stumped do u have any ideas?

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This could be a number of things but i think that your problem sounds like a vacuum leak or an EGR problem. Try listening for leaks and try un-plugging the EGR solenoid valve one time.

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WELL YOU CHANGED ALMOST EVERY THING EXCEPT IGNITION CONTROL MODULE........

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1997 cavalier runs fine but when i slow down or stop engine shakes and sputters and dies sometimes but it will start right back up


check the iac valve idle air control valve its on the throttle body needs service. or replacement.

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My gmc 4.3 stalls when warm and wont start without ether. then it runs fine


I had the exact problem with my 1993 chevy c1500. I found that the IAC was sticking so the engine would die at idle after warming up and the ignition module was pulsing the ECM intermittently after the engine warmed up so the fuel pump wasn't being turned on after the engine died....I replaced the ignition module and the IAC valve and all is good. I don't know if testing the ignition module reveals that it isn't sending pulses to the ECM.

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I am getting codes PO 128, PO 300 and PO 506 on my chevy Impala, 2002, LS 3.8


code P0128 ECT ( electronic coolant temperature ) engine temperature to low ( replace thermostat ).

code P0300 engine miss fire detected ( replace spark plugs and spark plug wires )

code P0506 IAC ( idle air control ) system idle to low ( clean the IAC valve if problem persists replace the IAC valve )

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2002 Jeep Liberty - 3.7 Liter - Engine has begun to die when rpm is at or near idle. Such as pulling into a parking place or stopped at traffic light. More frequent after engine has warmed. Once engine...


I would start with cleaning the throttle bore and plate. Then clean the Idle Air Control valve, IAC, as this is the device that controls idle speed. Use a can of spray carb cleaner and an old toothbrush. Trouble with the IAC would make sense if you can keep the engine going by holding down the gas pedal a bit.
Use the carb cleaner to check for vacuum leaks at hose connections and elbows. run engine and spray short bursts at hoses and listen for idle speed changes.
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Rough idle only when in gear.


The Air Idle Control Valve (IAC) may be bad or dirty with carbon build up. Check for loose wire, remove and try to spraying it with throttle body cleaner to clean the carbon out and dry it with a hair dryer before installing.
The other thing to look for to is stuck EGR valve. same process as the (IAC) as to cleaning it too. If both are beyond cleaning then replace it.
You can go to Auto Zone and have the car scanned for any DTC codes which would indicate any problems with the (IAC) and EGR's performance.
The other thing to that would make the engine shake at low RPM's is bad spark plug and wire or low engine compression, but that would give you problems through out the whole engine's performance.
Good luck and hope this helps, Start with the (IAC) and EGR as to cleaning and scanning the engine.

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Idle high to low


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Try replacing the coolant temperature sensor for the injection system.

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