See full version: How do you get air out of a fuel line
Air bubbles are caused by any air leak on the vacuum (suc‑ tion) side of the fuel system from the fuel tank pick‑up to, and including the lift pump (see Figure 1). If there is an air leak in the fuel system, air bubbles will be present in the clear cover of the Fuel Pro.
If you decide to alter the fuel injection pump, you’ll need to: [links]
To purge air from the low-pressure side of the fuel system, open fuel-line unions and bleed ports downstream of the pump, one at a time, beginning with those closest to the pump, and continue pumping until fuel, and not air, runs out. more
Turn the engine so that the unit to be checked is toward the TDC of compression stroke (plunger upstroke) so that hair line marking on plunger and pump body are coincided. When hair lines are coincided, stop turning and check the mark on the fly wheel whether timing is correct or not.
Air bubbles are caused by any air leak on the vacuum (suc‑ tion) side of the fuel system from the fuel tank pick‑up to, and including the lift pump (see Figure 1). If there is an air leak in the fuel system, air bubbles will be present in the clear cover of the Fuel Pro. here
If you decide to alter the fuel injection pump, you’ll need to: more
To purge air from the low-pressure side of the fuel system, open fuel-line unions and bleed ports downstream of the pump, one at a time, beginning with those closest to the pump, and continue pumping until fuel, and not air, runs out. here
Turn the engine so that the unit to be checked is toward the TDC of compression stroke (plunger upstroke) so that hair line marking on plunger and pump body are coincided. When hair lines are coincided, stop turning and check the mark on the fly wheel whether timing is correct or not. more
I did see a couple of threads regarding bubbles in the line, but they did not actually say how it affected the car. Let me tell you what is happening:
I have 2003 Megane II 1.9 DCI with about 177,000 miles on it.
The past 4 days, the problem has started to get worse, especially in low gear. I start driving and loss of power, I lift my foot and press down and we are back in business, but sometimes it happens like 5 times in a row. Other times it doesn't happen at all. here
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