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Originally Posted by Mike Gerber
I would check the engine coolant temperature sensor with a digital volt ohmeter for being slightly out of range. Toyota calls this an ECT sensor. It may not be sending the right information to the ECU (computer) upon restarting a warm engine. The ECU uses this information to meter the air/fuel ratio. I'm not sure where it is located on your V6, but it is usually under a green colored plastic connector.
Mike
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Hi Mike, thanks for that. Before I go for a rummage for the 'stat (which from memory is somewhere down near the waterpump on the '89 v6), would a fault caused by the temperature sensor be logged by the ECU? I was thinking it may be easier to dump the ECU fault codes and see if the machine also thought this was the problem (since I guess they are ultimately be connected...). I'll have a look this coming weekend.
Thanks again
Matt