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Thread: 88RRC extemely low idle on petrol fine on lpg

  1. 17th February 2013, 08:55 PM #1
    Vanderz's Avatar
    Vanderz
    Vanderz is offline Master
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    88RRC extemely low idle on petrol fine on lpg

    So out of nowhere the old Rangey started idling really low when it warms up. Sitting around 300-500rpm. I've adjusted idle and the only thing it really changed was the lpg idle. The injectors are new, Afm and cpu are known good. So i guess I'm wondering has anyone had this problem before?
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  2. 23rd February 2013, 09:33 AM #2
    Jazzman
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    Vacume?

    Have a look at the vacume lines. Particularly the lines at the back of the motor that go the the over pressure valve for your fuel line. From memory there are 3 2X about 100mm long and 1X about 50mm long.
    Be careful to ensure the wires going to the vacume switch are connected before you try to start the car (you might disconnect them changing the vacume lines) as they are not fused from the ignition if the positive (white wire i think) touches the engine there will be sparks and melted wiring loom if left on for too long.

    Hope that helps.
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  3. 23rd February 2013, 09:37 AM #3
    Jazzman
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    Actually having said that, if you had a vacume leak it would be noticeable on gas as well.

    I hope it is not your Throttle Position Sensor on the intake they are expensive for what they are.
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