Misfire only when hot?
Once the truck gets hot hot it starts to have misfires in 5 and 7. Misfire typically only happens at idle after coming down from higher rpm. The upstream oxygen sensors are reading 15 for long term fuel trims. This meaning that we are lean in the mixture. I have narrowed it down to possibly dirty injectors, ECU, Dirty intake valve (sealing issue).
Cette question est-elle utile ?