When trying to start from the key it won't start. But if we bump it, it starts and won't disengage. We check relays and all seem fine. When I first started to have problems for 2 days it would click and wouldnt start on first try. Finally day three it only click and finally nothing. Figured it was starter and bought one used. Thought it was the battery also tried another. But still only start from bumping. What could the problem be.