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Thread: New coil/rough idle 89 RR

  1. 27th February 2008, 06:59 PM #1
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    PeterH
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    New coil/rough idle 89 RR

    Hi all, my trusty old coil finally packed it in this morning,verified by an auto electrician, so I fitted a new Lucas one..(yes the correct one for my '89 3.5efi Range Rover).
    While it runs again and I'm happy about that, it has now developed a rough idle with an irregular miss also slightly rough acceleration.
    It did have a slight rough idle before the new coil, but is much more noticeable now.
    Could it be the new coil is putting out a much stronger spark, therefore amplifying the existing rough idle/acceleration?
    It has recently had fitted new distributor cap/genuine rotor/ quality leads/ new plugs.
    Any thoughts?
    Cheers.
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  2. 27th February 2008, 07:23 PM #2
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    djam1
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    Peter did you use a Genuine cap as well as rotor ??
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  3. 27th February 2008, 07:37 PM #3
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    PeterH
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    Lucas cap.

    I used a Lucas cap.
    This has been on the vehicle for a few weeks now.
    From memory the genuine Land Rover cap was very expensive.
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  4. 27th February 2008, 08:40 PM #4
    PhilipA
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    Could it be that you wired the coil back to front?
    Negative to dizzy, positive to power supply and signal to ECU.
    Regards Philip A
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  5. 27th February 2008, 08:42 PM #5
    PhilipA
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    Sorry I have just been watching "House"
    Negative to dizzy , positive to power and ECU is the correct way, that should have said.
    Regard sPhilip A
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  6. 27th February 2008, 09:10 PM #6
    PhilipA
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    Ah, it must be House's influence.
    I am surprised at how slow everyone is to spot the deliberate error. You are all fired.
    RPM to ECU is from negative of course.
    Regards Philip A
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