1992 4x4 22r, efi, won't start when its really cold outside. It cranks fine when its warm out, even it has sat for days. On cold mornings it turns over fine, may even act like its going to start, but won't. I can crack open the air filter canister, spray a little either at the edge and it will crank up fine, idle fine and crank the rest of the day. The next morning if its cold out, the same thing. Help! Thanks.