Hi there - there are a couple of possibilities for this problem. Worst case is that during the ignition modification, the tachometer was somehow shorted, and is not non-functional. More likely is a lack of the proper "trigger" path from...
It sounds like there is an issue with your accelerator cable. It is possible that it may be broken or has come detached from the throttle of your engine. I would recommend that you enlist the help of a certified...
