It's not the MAP sensor

On Saturday I put the inside of my car back together (the passenger side foot well has been a mess while I've been installing the PLX R-500) in preparation for my drive to the UK this week. After doing so, I went for a drive to check that everything was connected properly and working.

Despite the boost only getting up to 1.10 bar, I'm still getting a stutter when I accellerate full throttle in third gear. However, the stutter did come later in the rev range. So, this really rules out the MAP sensor and I'm back to trying to find the cause of my problem.

It has to be somethingon the control side of the engine... I suspect it's the ignition timing but to be honest I think it could be anything on the ECU side. I think it's going to be extremely difficult to track this down and this lends more weight to me installing a new ECU, if only to be able to get a better insight into what's happening in the engine. So, I could be installing that Haltech ECU sooner rather than later, depending on how Jarle in Norway gets on with finishing his Haltech installation in his bi-turbo over the next few weeks...