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Engine dies while driving at any speed. It will not always restart immediately. If it does restart, it is immediate. If not, you must wait 5 ~ 15 minutes before the car will restart. Fuel supply has been confirmed as OK. Fly wheel sensor has been replaced along with the air/fuel controller.
 

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next time it is dead and will not restart, try knocking on the over voltage relay. If it starts right up, that is more than likely the culprit. It is on the pass side of the engine compartment near the ecu. It is square with a clear round top that looks like it has a green fuse inside.
 

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2004 Lexus LS 430 Modern Luxury. 2012 Acura TSX (fun fun) Maybe MB again one day...
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Check the part number on the OVP and see if it is the old "faulty" part.

Do a search. Sounds like the culprit, very common.
 
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