My 974runner ran fine up until today, this morning the runner turned on just fine, I went to drop off the gf and stopped by the local car parts store to pick up cataclean, when I attempted to start the truck it would have hard time doing so. I didn't turn on till I have it some gas. So its been doing that now. When ever the 4runner is warmed up it won't start until I give it gas! Anyone help??