Do I have a chipped ecu?????

[88driftIS]

Well, just did a tune up, finished changing all front suspension parts on my new to me e30. and decided to go for a drive. I don't think I have a rev limiter. lol. got up to 7600 rpms before I let off realizing it wasn't stopping.

History of car. 1985 325e, it has a m20b25 in it that the owner didn't even know about. The tach is out of a later later I model. Is there a sensor or anything that could make the revs off?

Is there a way to tell if I crack open the ecu to see if there was a chip installed by the previous owner?

Want to make sure of what I have.

Thanks for the help.

[nando]

it could have the coding plug from the e, that would make the tach read wrong. you would have floated the valves long before 7600rpm.

[jlevie]

If the cluster has been swapped, it could be one from a 318. The tach would then read high by a factor of 3/2.