Are your running one of those ebay super duper chips? Your timing is too advanced, or your gas is too retarded. I would run A good fuel system cleaner, and possibly a pint of 2 cycle oil in a full tank of gas. Then I would not buy gas from wherever you bought it before. The sound is appropriately dubbed "Ping".
On a separate note I would not use electrical cleaner on the MAF sensor standard electrical cleaner has a special additive to protect the connections it cleans. You can find the right stuff at a good auto parts store. This is only my educated opinion, it is not meant to offend, but to possibly save someone a headache.
The right stuff is named "MAF Cleaner". HTH
Last edited by 02'4.04x4; 08-20-2009 at 10:40 PM.
Reason: the name