Airlock in fuel line?

BUCKOEM

MEMBER
2009 NISSAN QUEST
1.5L
2WD
MANUAL
230,099 MILES

I ran really low on diesel just over a week ago and parked up for a few hours on the driveway, when I went to start it up to go for fuel it wouldn't start.
I filled up from a can (about £15) and tried to start it up, but it wouldn't.
I am since aware that it should have been primed first which I didn't do.
A new in-tank fuel pump was suggested and so this has been changed.
The hand primer doesn't go hard at all when it is pumped and now the car won't even crank at all.
Wondering if it's an airlock or if further damage seems to have done?
It's a Nissan Qashqai 1.5 dci. 2009.

2 Replies

JACOBANDNICKOLAS

MECHANIC
109,755 POSTS

Hi,

I'm sorry, but this model vehicle isn't offered in the US, so it isn't identified in my manuals. However, I'll try my best to help.

First, have you tried bleeding the injectors to see if there is fuel present? Also, do you mean the engine/starter no longer engages? Have you checked to make sure the battery isn't low from working on the vehicle?

Let me know.

Joe

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Wednesday, June 28th, 2023 AT 9:32 PM

BORIS K

MECHANIC
799 POSTS

Hello,

Vehicle not cranking and no fuel supply will need to be treated separately.

First no crank
How good is the battery? Have you tried to jump start the vehicle?

Check the battery connections:
https://www.2carpros.com/articles/everything-goes-dead-when-engine-is-cranked

How to:
https://www.2carpros.com/articles/how-to-jump-start-car-battery-using-jumper-cables

Check charging level of battery using a voltmeter.

A good video:
https://youtu.be/YC--MLNIbik

Next if the battery is good and jump starting does not yield any results.
We will need to test the starter motor.

A good video:
https://youtu.be/6x2hIOtBfzE
and
https://youtu.be/0mKrx-fMi_8

First check that there is constant battery voltage to the main supply wire at the starter.
If in order next check that you have 12V supplied to the small connector at the solenoid when you try and crank the engine. for that you can use a voltmeter or a test light.

How to use either:
https://www.2carpros.com/articles/how-to-use-a-voltmeter
and
https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

If 12V is present, then this could point to a possible bad starter motor.
If no 12V is present when trying to crank the engine next check that fuse F54(10A) in the IPDM is still intact, see image 1 below.

The IPDM is the engine fuse block.

Next I would suggest to then remove the starter motor and bench test it

No fuel supply.

First check that the in-tank fuel pump energizes when the ignition is cycled on/off.
The pump has to energize for 2-3 seconds to prime the fuel system
If the pump cannot be heard energizing next check that fuse F57(15A) in IPDM is still intact. See image 2 below.
If fuse is in order next check that we have 12V supply at the pump connector using either a voltmeter or test light. This would be at pin 1, black/yellow wire. Also check that pin 3, black wire, has a good ground.

If 12V is given at the pump, the pump is working as it should then next check that the fuel filter is not blocked.

This can be found on the driver's side in the engine compartment.
See image 3.

How to replace:
https://youtu.be/bzjES73XcBQ

Hope the above information helps.

Cheers, Boris

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