miss still happening
am018
am018 at post.almac.co.uk
Wed Sep 30 07:51:17 GMT 1998
A couple of things I have come accross in the past that caused hard to
track down missfires.
Check the main feeds at the back of the alternator --- these sometimes
cause bad voltage spikes that cause missfires with electronic systems.
Also check the plug lead routing -- separate the leads as much as possible.
Andrew F. Gunnesch wrote:
> Well, I guess I spoke too soon... the miss is still there, though it
> doesn't happen nearly as often as it did before. Perhaps the ignition
> module also has an intermittent loose connection in it?
>
> When the miss is happening on my '89 TPI motor (MAF, '165 ECM, remote
> coil distributor, VSS in the transmission), the speedometer jumps up
> quite a bit. I'm thinking that it could be one of several things (I
> am getting a diacom today for testing to help eliminate possibilities):
>
> 1) Intermittent loose connection in either the ignition module or
> below the spot in the wiring harness that I spliced in (the 4-wire
> connector to the distributor)
>
> 2) Intermittent loose connection in either of the 2 wire connectors
> on the coil
>
> 3) bad ECM
>
> 4) bad VSS buffer box
>
> 5) crosstalk (induction, jumping spark, whatever) between one of the
> ignition wires and one of the wires that controls the distributor/
> coil operation
>
> Suggestions on how to proceed? Thanks!
>
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