Don't turn the wheel all the way to the lock and hold it!! If you have to turn tight bump
the stop and turn back a few degrees before accelerating.
Get a vacuum gauge and do a vac test, check this out for what the needle readings
mean.
Performance Probe
Do a compression test and see if it is showing a low cylinder. I just did the head
gaskets on my probe and number 6 was leaking into the coolant I had 170 on the
others and 140 on 6. Does your exhaust put out alot of steam/water? If you can't
see the water/coolant then put a cardboard box in front of the exhaust and see how
wet it gets.