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IDI Engine / Re: Need help with tracking down air leak in 1.9 AAZ pump
« Last post by fatmobile on June 06, 2024, 01:37:18 am »I forgot, there is a passageway from just underneath the front timing cover to the front of the pump as well.
I wonder if trying to put pressure on it would work as well. Maybe do both.
You mentioned air might be coming from the injector small line too.
It could be, I've had injectors that streamed air into the return line.
I actually have all the small lines clear.
One clear line on the last section heading to the pump banjo would let you see how much air is coming into the banjo from the injectors.
So you don't have any air bubbles coming out the front of the pump when you shut it off?
Have you put a vacuum gauge on the inlet fuel line to see how hard the pump is pulling when running?
I wonder if trying to put pressure on it would work as well. Maybe do both.
You mentioned air might be coming from the injector small line too.
It could be, I've had injectors that streamed air into the return line.
I actually have all the small lines clear.
One clear line on the last section heading to the pump banjo would let you see how much air is coming into the banjo from the injectors.
So you don't have any air bubbles coming out the front of the pump when you shut it off?
Have you put a vacuum gauge on the inlet fuel line to see how hard the pump is pulling when running?