<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:<hr /><font size="1" face="Verdana, Helvetica, sans-serif">Originally posted by wrinx:
Can't see it being the ECU, they don't "go wrong" as such, more likely to be a sensor fault or similiar.
wrinx</strong><hr /></blockquote><font size="1" face="Verdana, Helvetica, sans-serif">The electronics can become dry and this caused hunting on a previous car (fiat uno turbo...bosch ecu). It was becoming slow to react when required - ie when the lambda sensed it was running too rich, it would take a while to lean off, then once it started leaning off, it overshot the medium as it could not react in time. It then realised i'm way too lean, then took a while to richen up, then it kept richening past the medium as it could not react quick enough intime....plus on top of this it adjusts the revs to suit as well, rusult: idle fluctuated between 500 revs - 2k revs
A new(er) ecu cured this, but the sensors are definately cheaper to do first!!
Websites are like ********s, everyone has one, and im wary of any bloke trying to direct people into their's