Question about Nissan Frontier

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I have a 99 Nissan frontier 4x4 pick-up v-6 3.3L, runs great until you stop and let the engine idle the whole truck begins to shake and the rpm drops to about 500rpm's, if you rev up the motor it goes away,let off and around 750rpm it starts to shake and the rpm drops to 500rpm and the truck shakes bad and the motor wants to load up. Help if you can. Don

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  • donaldeblack Feb 06, 2010

    there has been work done to the vehicle

  • donaldeblack Feb 06, 2010

    Have replaced timing belt, tensioner and water pump also replaced all spark plugs. Checked compression in all cylinders, all above 160psi. I will check egr valve and also clean injectors.
    Best,
    Don

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Fuel air mix and idle on your model are controlled by sensors. I suggest a diagnostic code check first. You will need to use an OBD II reader to see if any sensor codes are stored. This can be done at your Nissan Dealer, or you can run a limited check for free at most national parts chains such as Advance or Auto Zone. They will read and interpret any diagnostic codes in hopes of selling you the part that is causing this issue. Good Luck! I hope you find this to be very helpful!

Posted on Feb 06, 2010

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Hello Donald.
Things I would look at would include,
A compression test (weak cylinder), an EGR valve coming on or stuck partially open, partially plugged or sticking EGR valve, ignition timing, spark plugs.
Does the check engine light come on or flash?
Let me know.

KL

Posted on Feb 06, 2010

  • FUBAR Feb 06, 2010

    Sorry, mentioned EGR valve twice. Second one was a partially plugged or sticking fuel injector.

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How many miles are on the vehicle? Was there any work done before this problem? What maintenence was performed before this problem? Is there any engine lights on?? Are you able to use a volt meter or fuel gauge to assist in a solution? Thanks.

Posted on Feb 06, 2010

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