read up on the sticky in the injection thread. Can you kill or slow down the engine at idle by putting your thumb over the idle air intake tower. the one that has a hose going from it to the air cleaner housing on one end and the other has the 5 bout quarter inch black vacuum hoses? It should be sucking all the air needed for idle through that opening. If not the rod lengths are out of whack. That's as good as anyplace to start.