Hello

I have an E34 525TDS i put booth tuningchip in the ecu and the car don´t start.
Has anybody an idea whats the reason?
its an 0 281 001 183 ecu.

Regards

Wrong Checksum or the chips are put in wrong order.

I placed like the original chips and than in every possible order.

i buy the file from a professionell tuner so i hope the checksum is right.

i dont now what i should do now.
i flash two pairs of eproms and it doesnt work.

in the car burns the light from injection.

put original back and see if it starts

Yes i drive now with original chips.

next speak to Your professional tuner You`ve bought files

I have used an 27c256eprom with 200ns acces time, its possible that i need an eprom with less acces time?

Regards