Question about Cars & Trucks
Stop first thing you need to check is spark not fuel we know you have fuel it starts.You require correct spark to ignite fuel in combustion process.
Posted on Sep 08, 2019
Make sure that there is not a restriction in the exhaust system.
Posted on Sep 06, 2019
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Posted on Jan 02, 2017
The idle speed is controlled by the PCM based upon sensor inputs using
the Idle Air Control (IAC) valve to regulate air input past the closed
throttle plate to the intake.
The PCM controls the IAC using a solenoid to move the valve body that opens and closes the air passage to the intake. The PCM ensures a seamless transition from IAC control to throttle plate control of engine speed using the Throttle Position Sensor (TPS) attached to the throttle plate.
If you pull the electrical connection from the IAC (round body fitting bolted to throttle body) usually the engine will stall. If it doesn't then you may have a vacuum leak. Check hoses and connections are secure. Your symptoms are consistent with a small vacuum leak.
Try holding the idle a bit longer, then the PCM will set a code. So that is what you need to do, try to hold the throttle just off idle to retain the hesitation long enough for the PCM to try a few strategies and settle on the problem and set the code. You can then get the code read at Autozone, Pep Boys or Checker. You need the P0123 number not the description.
Hope that helps!
Posted on May 19, 2008
i had a van do this same thing to a tee turned out to be a broken key pin in the harmonic balencer causing the timing to ****** replaced balencer and ran like a dream there is a crank sensor grid on the balencer when the key pin broke it trew the timing off
Posted on Jan 14, 2011
SOURCE: bogs down
Even though this is an old post i feel it needs an answer since there is 225 followers wanting an answer. This situation sounds as if this vehicle is either suffering from the Throttle Position Sensor switch which has bad spots in it causing lack of voltage or the Fuel rail pressure regulator which can not keep the fuel pressure built up in the fuel rail making the auto veel like it is running out of fuel.And the transmission speed densor which also controls fuel. The situations for each device has a test that can be done to determine which one it is. And last but not least lets never forget our fuel filter this can cause the exact same problem. I am eliminating the cam sensor because it stabilizes at idle. Eliminating the crank sensor because it too at idle also stabilizes and returns a smooth idle. So a fueling problem is what we have here one of the above. Enjoy and if you need help determining which one just ask me I will help you figure it out. Please rate my advise thanks it is how i receive my achievements.
Posted on Apr 11, 2012
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