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D901- BZW06-19B- Bi Directional- no stripe
D900- BZW06-19- Uni Directional- stripe
I ordered a pack of D901 weeks ago and they still haven't turned up, RS components said they were on back order. D900's were easy to get and arrived quickly.
I'm intrigued to see which one has failed for you.
Well I eventually found diodes and got them fitted and refitted the ECU to the car, with mixed results.
The car is still not running, however it is no longer popping fuse 27 and I no longer have continuity between pins 18 & 19.
I now do have fuel pump activation and spark, but the fuel injectors don't seem to be firing.
It looks like it was the D901 diode that was at fault, as the D900 was reading exactly the same resistance as the new ones.
Ironically I only had to replace the D901 due to me being clumsy and damaging it.
The car has been sitting for about 5 years, but the old fuel has been drained and re[laced with fresh fuel.
It is running standard 95 octane UK fuel as that is all that is available where I live.
That is always a possibility, and one I will be checking shortly as I am running out of ideas fast.
The car has had regular start ups over the years, and was driven out of the garage 6 months ago but refused to start when it was going back in the garage 3 hours later, so it was a sudden failure.
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