4000rpm cut out

[Dean]

my car sometimes hits cut out after full boost (0.94BAR has PM system and BBR) could this be over boost? It has also happend in the mid range 30mph in 3rd after a misfire is this the cam angel senser. Does not happen now on super unleaded. well once in a blue moon.

[Doc Fizzix]

If you have a MBC then changes in the barametric pressure can cause over boost on days of low pressure. This is only a guess, I am sure the other people in the forum know more then me but I have the same problme from time-to-time on certian days.

[ESM]

The BBR clips the MAP sensor reading and prevents the fuel cut occuring so, if the BBR is working, overboost fuel cut 's not your problem.

[Dean]

Ok thank's for the help i should say that the mid-range misfire happend when on super. and also a Lotus dealer had the car for a week and did not find a code.

[M100 TWO]

I would look at the coil it will not bring up any code when breaking down under boost, just replaced mine it has transformed the engine it is not harsh any more

[Dean]

My engine run's OK it's not harsh at all. The "light" only come's on when rev's drop to 2000rpm. have not reed hand book for a long time but i know that most engine's do not supply fuel above this when you are not on the Gas.

[ESM]

Have you read the code (see here)?