![]() Therefore, for example, if you're running a bit lean at idle you'll be running a bit lean the rest of the time too. That mixture, right or wrong, could be considered the "base mixture" and is modified by vacuum enrichment, all the cold start hardware, geometry of the intake plenum, etc etc. It would be nice to dial in the mixture properly and not just by guesswork.Īnd as a further aside, maybe somebody can confirm or correct my understanding of the mixture setting: The screw that sets the mixture (as reflected by CO level) does so by changing the geometry between the air sensor plate and the control barrel in the fuel distributor. I interpret this to mean that it's now running leaner, hence hotter. Anybody have experiences or heard rumors about it?Īs an aside, my car now seems to run a bit hotter after installing new WUR. Reviews and comments seem to say the unit is more-or-less OK for that purpose, particularly on no-cat, pre-emission controlled cars (mine is early, uncontrolled emissions, euro 6.9). The purpose, obviously, is to get mixture set to spec. With the money I saved by not needed a fuel distributor rebuild I'm thinking about one of these exhaust CO analysers:
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