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In the cold my truck starts okay, but when the engine is warm or even in warm weather, it takes 2 to 3secomds to start. I just checked codes and found nothing wrong according to the computer. I am completely lost on where to look next. I am wondering what I need to look at and what is causing this problem.
I would start by checking the resistance of you engine coolant temp (ECT) sensor and your intake air temp (IAT) sensor. Check them when the engine is cold in the morning and then check them again after driving the truck for 15 minutes. You'll need a multimeter. Compare your resistance measurements to the ones on this chart.
If that's good, the next thing I'd do is unscrew your gas caps for a day. It's possible that you have a leaking injector, and as the temperature increases, evaporative pressure increases inside the fuel tank and forces fuel into you intake manifold through the leaking injector.
I would start by checking the resistance of you engine coolant temp (ECT) sensor and your intake air temp (IAT) sensor. Check them when the engine is cold in the morning and then check them again after driving the truck for 15 minutes. You'll need a multimeter. Compare your resistance measurements to the ones on this chart.
If that's good, the next thing I'd do is unscrew your gas caps for a day. It's possible that you have a leaking injector, and as the temperature increases, evaporative pressure increases inside the fuel tank and forces fuel into you intake manifold through the leaking injector.
I have already changed the act and Ect sensors as they were bad.
Check you new sensors to make sure they're behaving correctly. And then loosen you gas caps. Those checks cost you $0.
Dont *****-nilly replace your fuel pressure regulator until after you determine its bad. Put a fuel pressure gauge on your fuel rail and diagnose it properly. https://www.ford-trucks.com/forums/1...rd-trucks.html
I would start by checking the resistance of you engine coolant temp (ECT) sensor and your intake air temp (IAT) sensor. Check them when the engine is cold in the morning and then check them again after driving the truck for 15 minutes. You'll need a multimeter. Compare your resistance measurements to the ones on this chart.
If that's good, the next thing I'd do is unscrew your gas caps for a day. It's possible that you have a leaking injector, and as the temperature increases, evaporative pressure increases inside the fuel tank and forces fuel into you intake manifold through the leaking injector.
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