• It is a transmission related problem. It could be electrical, transmission or... nothing. The trans prog message cause the E34 to run in 3rd gear only, that is the reason wht you feel the car has no power. Check: 1) Turn the car off and wait 10min - 2) Main power relay, power to trans control module - 3) Gear selection switch - 4) Program switch (Manual or Auto) - 5) Computer box - 6) At last, the transmission.
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This engine is fully electronically controlled, so you need the dealer to do a full diagnostic of the engine control system, it is the only way to get to the bottom of this. Make sure you can show the dealer exactly what is going on otherwise if they can't duplicate the concern and no fault codes are present they can't fix it.
I had a similiar problem on my 1999 Dodge Ram 1500 Conversion Van. It ended up being a partial collapse of the catalytic converter which didn't allow adequate exhaust. The problem only showed itself because I could not get over 55 mph going up a small hill.
The flashing or "blinking" service engine light is indicating an over fueling condition that may damage the catalyticconverter. There is a good possibility you have a defective or stuck injector, possibly ignition issue.
Take you car to Auto Zone and ask to have the codes read, they will do this for you at no charge, write the codes down and reply back.
Let me know.
Regards,
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