juddery

well had the car in to uncle arnolds today for warrenty work . said they wenrt fixing it cause my upper boost hoses and tip dv ect..... so am back to were i started. hears my prob while driving car seems not the have power it once had then soon as its goes past boost it judders real fast then...

some mornings, my cars juddery first thing in the morning, then after two mins ok, but you can be in 3rd accelerating slowly and will shudder a bit. few months ago i had a fault check and it had a dump valve and maf sensor fault. ive had a new baily dump valve fitted, so would it be the maf...