Dave Plowman (News) wrote:

In article ws.net,
:::Jerry:::: wrote:

dwell measurement. Of course at the end of the day, things like the
ECU can only really be verified by substitution. However, the failure
rate of these is very much less than the average mechanic might
believe.



The problem is, when they fail it's often due to another fault further
down the line, unless that fault is corrected the new ECU is destined
to go the same way as the old one, hence the unthinking /
knowledgeable mechanic (which there are plenty in back street
workshops I sorry to say) will see an disproportionate number of
(repeat) ECU failures.


Could be, although it's a poor design of ECU that can be taken out by
external component faults, as they're mainly fed of its power rails.

Ther sensor side no, but te driver side, yes. A shorted solenoid being
driven by a mosfet will smoke the fet.