Lincoln Navigator Low Power video question
6 years 9 months ago #10633
by Tyler
Lincoln Navigator Low Power video question was created by Tyler
*raises hand* Mr. Danner? I've got a question!
At around 21 minutes in, you're talking about fuel pressure bleed down testing in relation to mechanical and electronic returnless systems. The mechanical system diagnosis is (obviously) pretty straight forward, but you state that there are additional checks needed if it's an electronic system?
I ask because I looked at a Focus recently that had a long crank time symptom. I used the fuel pump bidirectional test to test pump output and bleed down rate, and came up with this:
I felt this was fairly conclusive. Fuel trims were positive, so no leaking injectors, and no fuel leaking into the pressure sensor vacuum hose. I'm unsure what else in the electronic system would account for rapid pressure loss. Thanks!
At around 21 minutes in, you're talking about fuel pressure bleed down testing in relation to mechanical and electronic returnless systems. The mechanical system diagnosis is (obviously) pretty straight forward, but you state that there are additional checks needed if it's an electronic system?
I ask because I looked at a Focus recently that had a long crank time symptom. I used the fuel pump bidirectional test to test pump output and bleed down rate, and came up with this:
I felt this was fairly conclusive. Fuel trims were positive, so no leaking injectors, and no fuel leaking into the pressure sensor vacuum hose. I'm unsure what else in the electronic system would account for rapid pressure loss. Thanks!
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