[magleam]

Hi everyone hope someone can help,the problems i have is that under about 2500rpm it is very sluggish,when it gets to about 2500rpm it starts to pull as it should,it has recently had recon turbo fitted,but problem was there before turbo replaced, i have also changed turbo boost control valve with no improvement,it also has excessive black smoke and not very economical,no egine management light on, any info appreciated,cheers