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Charlescrown wrote:And make big changes to the tune because it will be running super lean because of the lower voltage going back to the ECU. I don't know if the resolution is a big problem because of interpolating between the cells.

Voltage may be different, but setting the flags for a 3 bar will sort all that out.
The resolution drop isn't going to cause any major issues.

Thanks for all the replies, hopefully fixing the brake booster gets rid of the error code. Just don't want to spend money on a original MAP sensor when it will be boosted in future anyway.

unplug and block the brake booster hose, clear the code and see if it returns ?

Thanks Sam, the ute (my daughter calls it the bomb) is in getting the booster rebuilt so will do this when it returns.

Just wish I had put 2 + 2 together re the brakes and rough idle and it would have saved me heaps of wasted time playing with the tune and injectors.

Cheers

Why do you have to wait for the brake booster to be returned? Can't you just plug the port on the manifold? You shouldn't need to drive it to test this issue.

My guess is the ute is with the brake booster in the workshop.

Charlescrown wrote:My guess is the ute is with the brake booster in the workshop.

Yes that is correct.

ah ok, I thought you would have just removed the booster and sent it in for repairs

I had the whole braking system rebuilt (except for the booster) as the car had been sitting for 10 years or so. so it just went back to them to work out why the brakes were acting up.

Good news the MAP problem was just an earth come loose from A11 pin at the harness.