Guys thanks for all the tech advice, but your talking to a builder here, not a mechanic, and whats worse is there are very few real mechanics out here that know anything about the LT5 motor. Its all a bit beyond me so Ill gather all this info and take it to the one bloke I know of that could help. The throttle body came off but was not powdercoated. I polished that myself , and I did know about the sealer inside. The problem only got worse recently, and I thought it may have been a poor batch of fuel, as it started to ping as well. Have a new lot of fuel now but havent had a chance to run it thru yet. Thanks again for the info, will let you know how I go.
