Starting problems

Technical questions and answers about the Mazda Bongo

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steve9617
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Starting problems

Post by steve9617 » Mon Feb 01, 2021 12:23 pm

Hi all

I have an unusual problem (I think).

My 95 2.5 diesel struggles to start once the tank gets below about 2 thirds full.

While it will eventually start but just turns over until I catches and springs to life.

The accelerator pedal is also pretty non responsive for 10 secs and then the engine will rev normally.

Im not sure if this is a battery issue or a fueling issue.

Any advice is greatly appreciated.

Thanks

Steve
Bob
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Re: Starting problems

Post by Bob » Mon Feb 01, 2021 12:29 pm

Try loosening the fuel cap and see if you get a 'whoosh' of air.

Possibly the breather blocked?
steve9617
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Re: Starting problems

Post by steve9617 » Mon Feb 01, 2021 1:24 pm

Bob wrote: Mon Feb 01, 2021 12:29 pm Try loosening the fuel cap and see if you get a 'whoosh' of air.

Possibly the breather blocked?
Thanks Bob I'll check that out later.

If I get the 'whoosh' is there a good way to unblock it or just stick something long down there and see what happens?

Thanks

Steve
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Re: Starting problems

Post by Bob » Mon Feb 01, 2021 1:45 pm

I'm pretty sure Geoff has put up some pics on how to dismantle, and then clean, the filler cap. :)
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Re: Starting problems

Post by g8dhe » Mon Feb 01, 2021 1:59 pm

The valve in the cap is just clipped in, there are a couple of variations can't remember if that was the diesel or petrol version but they are similar.
Fuel_cap_air_inlet_valve.jpg
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steve9617
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Re: Starting problems

Post by steve9617 » Mon Feb 01, 2021 2:52 pm

Thanks guys it's much appreciated.

I'll see what happens.

Thanks
steve9617
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Re: Starting problems

Post by steve9617 » Mon Feb 01, 2021 6:59 pm

Sadly no 'whoosh'.

It still stuttered with the cap off.

Thanks for the advice but any other guesses?
Bob
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Re: Starting problems

Post by Bob » Mon Feb 01, 2021 7:16 pm

Ahh well, at least you've eliminated that.
willow2u
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Re: Starting problems

Post by willow2u » Mon Feb 01, 2021 8:41 pm

It must suck a bit of air somehow
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Re: Starting problems

Post by Ian » Tue Feb 02, 2021 9:45 am

Perished seals on the diesel pump would introduce air in to the fuel line.
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Re: Starting problems

Post by Northern Bongolow » Tue Feb 02, 2021 9:18 pm

As above with the pump, try parking it nose downhill see if it improves things.
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