21MPG Mpi
Turbo Mini Forums

I am having some major issues with my car as of late, recently it has start popping and banging on the down run, when you are in say 3-4 gear down at about 1500rpm and you try to accelerate it almost chokes itself and then takes off like a rocket, oh yer and i am only getting about 21 miles per gallon any ideas before i take it over to mini speed?

MAP sensors always give trouble on these. It would probably be the first thing I would try.
Whack a ultimeter on the lambda and see how its reading

On 12th Nov, 2009 Paul S said:

I think Gary OS has taken over my role as the forum smart arse

Have a diagnostic done on it, but make sure you check ALL the ground points, clean them and make sure they are secure. Most important one is the ECU ground behind the ECU itself just below the triangular brace on the bulkhead.

Other things that can cause these sorts of symptoms are the cam sensor or map sensor. It may not be the sensor itself, but the wiring.

These cars are suffering more and more with wiring faults, some have found the common wiring points buried deep in the loom itself suffer corrosion and breakages.

Good luck

also maybe the temp sensor? if its failed it could be overfuelling thinking its cold?

Hi,
All of the above, cam sensor strangely enough will cause over fuelling on a Mini!
Also vacuum pipework or air leaks.
If it's it a cam sensor fault logged in the ECU cam timing is also a possibility...
Cheers,
Gavin :)

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i had this,for me it was one of the square plugs on the left hand side of the injection manifold,also jumped around abit on the revs side of things when at idle.

On 30th Aug, 2008 Richie said:
too much my wife says "not that friggin site again" so i pull my pants back up and turn it over to TM. iam on pretty much every day as i lead a sad existance