If one were to mistakenly put a non vented gas cap on a truck which required one what would the symptoms be? This truck has an aftermarket gas cap which was not tightened enough to get it to vent. It is spring loaded and we are unsure if it was venting the tank. The truck, after getting hot will buck and stumble through half petal but run good on full petal. Could this be the cap?
Last edited by beltfed; 02/28/2017 3:15 AM.
