Well it turned out to be a boost leak in the boost gauge line I don't know how the gauge read vaccum it was a massive crack, I went to the local truck supplies shop and bought some new 8th inch plastic hose for 2 bucks and found another small leak now there both fixed the car boosts properly only now I have another problem now at about 5000rpm in first the engine breaks down and splutters and looses power also if I'm cruising along in 5th then ease power on it begins to splutter. The car has splitfire coil packs there probably old so I'm thinking one might be stuffed I have replaced the plugs and it made no difference so I'm hoping it will just be one coil pack, buy a new one and then work out which one is failing well I'm hoping it will be that easy anyway