Hi guys, I am looking for a bit of inspiration here. I got this car in after it's been elsewhere and had 3 ignition coil packs fitted with no improvement in the running. It has a slight missfire at idle and after a few minutes of running switches off number 1injector pulse when the missfire becomes more noticeable. On Initial inspection I noticed the engine and timing chain seemed noisey and there was no oil showing on the stick, so carried out an engine flush and new oil and filter with not much of a change a check of the valve timing found the chain was loose between the cams. New chain kit fitted and still no improvement, compressions are all good, cylinder leakage is fine but manifold vacuum is low. I have smoke tested the intake and can't see any serious leaks and spraying WD40 around intake makes no difference, swaped injectors around in cylinders looked at primary traces with scope but still no further forward. Any opinions?