Hi, I bought a pretty rough 2002 2.5 TDi which goes pretty good and getting better as I work through it. My question is it should have the 88 AJT engine, but on the plastic engine cover it has ACV. So it makes me wonder if it has had a ACV engine planted in it at some time? I just wondered how you told the difference between the two. It has a intercooler but that could have been retrofitted.