juddering at 4000 rpm!!!
 

hi guys i have a my 2000 uk turbo and its started juddering at 4000 rpm when i boot it,ive cleaned the boost solenoid and pipes and checked for leaks but found none,also changed the fuel filter and still does it...
help please guys

also done a ecu check and no faults!!
help please

MAF sensor most likely.

plugs, leads ?

ive tried the maff sensor check where u unplug it while its running and it doesnt cut out,could it still be faulty??
i would of said plugs and leads but its too violent to be a miss fire and it only happens on full boost in gears 3-5

possibly overboost and fuel cut then, do you have a boost gauge ?

yes i do and the boost is fine apart from when it judders but it does not over boost

Sorry, the car doesn't cut out when you disconnect the MAF? It's ment to cut out.

This doesn't always diagnose the MAF is faulty either way, so i would replace it anyway.

sorry i meant to put it does cut out,ive had the maf out and the metal bits inside are very dull when they used to be shiney

Change the maf then;) failing that try the following- plugs, leads, and clean boost solenoid.

maf done today and still the same so changing plugs tomorrow,just hope that works

spark plugs done and all good again...result

Member 99greenwagon will be thrilled at this result. :)