Noticed our '97 Cooper MPI has been hunting a fair bit at idle.
I fancy it is running rich too, as the exhaust is quite sooty and it pops when backing off the throttle.
Question is, how to diagnose / tune?
I'm used to working on a Pug 205 GTI engine where running mixture and idle etc can be adjusted but have never done any work on our MPI- what adjustments can actually be made, if any?
On my Pug hunting can be caused by the mixture being too rich - so maybe thats why our MPI is hunting?
Or what should I check out/replace etc?
Cheers