Vehicle Compatibility Information For Ford F-150 2005-2008 V6 4.2L SYMPTOMS OF A FAULTY FUEL INJECTOR !Rough idling & stalling. The vehicle might shake and stall when idling if it is not getting enough fuel in the combustion chambers. !The engine misfires. Often caused by dirty or clogged fuel injectors. !A fuel smell. You might smell a strong fuel odour in and around your car if there is a leak or the injectors are releasing too much fuel. !Starting difficulties. When too much or too little fuel is being supplied this can prevent the engine from starting and lead to engine failure. !Increased fuel consumption. !The check engine light is on. .
