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Crank up runs good for couple mins then rough idle like its going to die then it will catch up dose it over and over smokes a little black souty looking but runs down the road good
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If the code for the crank sensor comes back, then there's still a fault in that circuit. Check for sensor resistance and wiring harness short or open. Crank sensor resistance should be 1,630 -2,740 ohms when cold. TPS would not cause those symptoms. IAC could cause rough idle but wouldn't affect higher RPMs. Bad coolant temp sensor could also be part of the problem. Bad sensor = ECM thinks engine is warmer than it is and provides too lean a mixture. But fix the crank sensor issue first since that affects the fuel injectors.
Dose it run on all cylinders or run rough when idling or jerking when taking off or engine getting hotter than it used to, when going from gear to gear dose it pull as good as before,do you use any oil in 1000 km's or coolant ,dose the exhaust blow black smoke or blue smoke .
IS IT A DIESEL as all these things come in to it plus air filter bunged up ,air leak in intake manifols ,fuel filter or fuel pump needs checking and or replacing ,.
Without seeing it we can only say what it could be.
So let me know how you get on.
Ron
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