Please help me I baught a vl wagon and put the 3 litre and auto trans back in. I got the vl started and it ran really rough and blew black smoke when I tried to rev it up, when you would drive the car it would run really well then I couldn't accelerate and it wanted to stall. I replaced the spark plugs ,the leads,coolant sensor,internal fuel pump,external fuel pump,fuel filter. Then I took it to the mechanic and they told me they put a dignostic machine on it and it came up with the throttle position sensor faulty and the cas was faulty, I went to pick it up and it just turns over with fuel and spark and won't start. I got the vl home and just replaced the tpi and the cas AND IT STILL Won't BLOODY START PLEASE HELP ME.