SAAB 9-5 (1997 - 2009) - 00 3.0 Miss-firing when hot start up

Honest John Back Room » Technical matters
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Fri 21 Aug 2009 09:29
00 3.0 Miss-firing when hot start up - alsho
Your advice please,
>
> I have a V6 turbo automatic Griffin which
> has done just 90,000 miles. The car starts instantly hot or cold and
> drives as you would expect, smooth and fast. When hot however, if the car
> has been parked for 45 minutes to a couple of hours, it will start
> without problem but after a few seconds will start to miss and then race,
> repeating this sequence for a short while. The accelerator has no effect
> on this. Switching off and then restarting cures the problem which will
> not re-occur until the next time it is parked up for a period of time.
> We have changed the D.I. units and spark plugs, the Lambda sensor and the
> Crankshaft sensor. The throttle body has been cleaned.
>
> I am getting very adept at slipping into neutral and switching off,
> restarting the engine and then back into drive again !
> It is liveable with because it is predictable and manageable, but
> annoying.
> Anybody got any ideas please?
> Thank you,
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