Dave Plowman (News) wrote:
I've fitted a new fuel injection system to the old car - the original was
analogue and not too brilliant.

It's working well but has an interesting side effect. There is an OBC
which calculates fuel consumption etc which is now wildly out. It worked
by counting the time one injector was open. The new system uses PWM with
feedback current limiting to drive the injectors which obviously confuses
it.

Is it reading well under on the fuel consumption? Response time of the
OBC to detect the injector openness could be slow, and hence a bit too
lazy if the the thing is PWM'ing...

Just a guess?

--
Adrian C