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Fuel and fuel systems Petrol vs Diesel, LPG Conversions, premium fuels, and all that gas

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  #1  
Old 04-02-18
Obelix Obelix is offline
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Default NW - Hard to start when tank fuel level low

Hi,

My Diesel NW 2014 has been hard to start (8+rotations) when the fuel level is low in the tank.
It also stalls a bit at these times - but it would last only for a few seconds, then pick up again.

This is the second time it happened. The first time i topped up the tank and drove it 4-5 kms on a freeway and it cleared.
The second time, I took it to the freeway, but the problem didn't fix itself.
However, it went back to normal as soon as I topped up the tank. I only use Vortex Diesel.

It now works well, but I noticed a bit of grey smoke when I start, and occassionally, when idling on traffic lights (but not always).

I suspect dirty Diesel which stirs as the level goes low, but before I do something drastic like flushing the tank, I was hoping for some advice.

Maybe there is a good fueld additive? Or some filter to flush?
I'm very new to this car so any advice would be appreciated.
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  #2  
Old 04-02-18
erad erad is offline
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Check the tightness of the hose clamps on the fuel lines. The fuel filter is above the level of the fuel in the tank, and therefore the fuel system at this point is under slight vacuum. Air can leak into the system and thus destroy the vacuum and prevent the fuel pump from sucking fuel to the common rail. Theoretically, the fuel filter should filter out any contaminants, and the level of the fuel in the tank should not affect the starting, but if you have a minor air leak, this is when it will show up.
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  #3  
Old 04-02-18
shawty950 shawty950 is offline
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If its only when the tank is low have a look at this thread

https://www2.pajeroclub.com.au/forum...ad.php?t=46638
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  #4  
Old 05-02-18
Obelix Obelix is offline
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Thanks a lot guys,

Will follow up on your advice. Will check the clamps first - easier...

Quite an interesting finding Shawty950.
Need to check on the service history, and twist dealer's hand if they charged me for the replacement

Did you have to flush the tank as well?

Last edited by Obelix; 05-02-18 at 01:23 AM. Reason: adding text
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  #5  
Old 05-02-18
erad erad is offline
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Shawty's reply may be the answer to your problem. If this is the answer, I think the problem is algae buildup in the fuel. What was happening was that the losses across that pre-filter were too high, but putting more fuel in overcame those losses. You can get additives which will kill the algae. CEM make a product which they claim to clean the entire fuel system. I am using this now, but have had no problems such as this up so far - I am trying to head them off before they happen.
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Old 05-02-18
Obelix Obelix is offline
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Just re-checked a very thorough, and expensive dealer service report - they claim they inspected the fuel hoses clamps, so I'll assume that's not the cause.

The next step is to replace the in-tank filter. Having said that, if the fuel is dirty - or if I have an algae problem, the new one would get clogged quickly.
The actual filter condition may indicate the cause.

Not sure how long the car was stationary at the dealer's yard before I bought it.
Alagae may be the cause.

re: CEM cleaner
But is unlikely to unclog the filter?

Will first call Mitsubishi dealership for the quote (the car is still under warranty - dont' wish it voided), and may replace it myself if the quote is too much.
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Old 05-02-18
BruceandBobbi BruceandBobbi is offline
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Will first call Mitsubishi dealership for the quote (the car is still under warranty - dont' wish it voided), and may replace it myself if the quote is too much.


Previous owner may have used cheap no name diesel at $1-23.7 per litre. Replace the filter i yourself with OEM. No warranty drama.

Also keep an eye on the under bonnet filter.
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  #8  
Old 06-02-18
Obelix Obelix is offline
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>>>Replace the filter i yourself with OEM. No warranty drama.

Struggling to find any reference to NW in tank fuel filters and where to buy them.
Heaps of petrol in-tank filters, for under the bonnet filters, but nothing for the in-tank.

Anyone can point me in a right direction?


Found this:
https://partsouq.com/en/catalog/genu...LYV98WEJ006795

entered the VIN and everything popped out - then navigate to the auto part. Quite impressive :-)

Last edited by Obelix; 06-02-18 at 12:16 PM. Reason: identified a solution
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Old 06-02-18
Allan2 Allan2 is offline
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Clean your MAF sensor in the top of the air cleaner. Disconnect the multi plug, It is held in place with two Phillips screws. Super cheap has the correct cleaner follow the instructions on the can.
Allan
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  #10  
Old 06-02-18
Obelix Obelix is offline
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Quote:
Originally Posted by Allan2 View Post
Clean your MAF sensor in the top of the air cleaner. Disconnect the multi plug, It is held in place with two Phillips screws. Super cheap has the correct cleaner follow the instructions on the can.
Allan
Thanks for the advice Allan. Will do it.
Can you educate me a bit on how is this related to the low tank?
Edit: Hopefully this reads right just curious to connect it and learn something.

Last edited by Obelix; 06-02-18 at 03:16 PM.
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