I have a 924gz. Starts good in the morning runs good then when it gets warmed up and shut it off and then restart it it will blow white smoke and won’t run. Turn key off then start again it will start and run just fine full power. Has code 1684 08. Speed sensor. Didn’t change Ecm. Didn’t change New wires sensor to ecm. Didn’t change Fuel pump. Didn’t change What next?
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