Does anyone know a good resource for setting the timing on my 01 targa? If its up on the stand at full throttle, or ripping down a step hill, it does this...reeee ba ba reeeee ba ba ba reeee ba ba ba...thing. Is this a timing problem? On the down hill it just bogs at high speed... reeeeeee baaaaaa baaaaa... like it's not getting spark or fuel, and once I lose a good amount of speed it re-Engages and I'm off again. Any imput?