inspection light problems

[tys]

i recently changed my 2.0l engine to a 2.5l the problem i am now getting is an intermitent one but what happens is when i rev the engine above 2000rpm the rev counter dies and the inspection light flashes quite rapidly, when it happened before i checked the oil and that was low so i topped it up and the problem stopped for a few days, it happens now at least every other day i checked the oil and that is fine, please can someone help me as i dont know what to do next.

thanks

[Brianmoooore]

What light do you mean by "inspection light"? I can think of three that could be described as this.

[tys]

above the green service inspection lights there is the word INSPECTION thats the one that keeps flashing.

[Gav325isport]

I now have the same problem,
I reset my dads service lights on his 325i e30
and now the Inspection light won't stop flashing and the rev counter won't work............... Help !!!

[Brianmoooore]

The inspection light should come on when the SI board tells it to, and stay on untill it is manually reset.
I've come across numerous different faults caused by a duff SI board,or more likely it's batteries, but this is a new one on me.
Must be the SI board though. Take out the instrument cluster, remove the SI board, and measure the voltage on it's batteries.
I and others have posted many times on how to change these batteries, so do a forum search.
Also search for "220 ohm resistor" while you've got the cluster apart, and check the nuts holding the fuel and temp gauges as well.