Hi there this is the first time i've ever posted a problem with one of my cars have always found problem and fixed it ok, not this time, so here goes. I won a quality 1996 Gal 90bhp with 1Z engine on fleabay a month ago in excellent condition and she was, previous owners seem to have looked after her. To cut a long story short owner said she just needed a Maf meter so after driving car home at 50 mph started investigating fault, bought a vag-com diagnostics and after scan revealed 553 Maf sensor 539 Fuel temp sensor 522 Coolant temp sensor 777 throttle position sensor 527 Intake air temp sensor All of these have been replaced 3 times I have a bag full of sensors mafs and bulkhead sensors, have removed and cleaned inlet manifold and egr valve, replaced all vacuum pipes bar the one going through bulkhead to ecu (if that's where it goes} looks ok but will change eventually.This is what happens with car; Idles at 1300 rpm hot or cold and sometimes goes higher and lower as if she's scavenging for fuel, has been fully serviced by myself including little white T filter with o ring on top of fuel filter, she pulls like a train up till 2300 rpm in every gear to 60 mph but on long uphill stretches will drop to about 50'ish. Diagnostics will not reset fault codes neither my cheap vag-com or my friends