Only getting very low boost?

steve0

Drum-Masta
Car has generally been running fine lately; but then yesterday it started being a bit strange. I was cruising down the motorway and had been for quite a while with it being normal. It generally hits about 20-21psi on peak and then tails off to about 15psi on full chat. All of a sudden, I put my foot down to overtake something, and it only boosted to 5 psi! I tried it a few more times and it kept doing the same thing. I was approaching my destination anyway, so shortly I stopped and let it cool down for a few hours (whilst I watched the Arctic Monkeys!:)) When we came out of the gig, we started back and it was boosting fine for a while. Then all of a sudden, it started only hitting 5 psi on full boost again. About half an hour after it started doing it for the second time, the Engine Management light came on, and has stayed on since.

Any ideas what this could be? Any info greatly appreciated...

Cheers
 
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