Very slow uphill and less than 20 mpg - Help

Dodgey · Post by **Dodgey** » Mon Sep 17, 2012 11:19 am

18mpg is definitely not right btw. I get 28 without trying (on long journeys). 18 is more normal for urban driving (towns etc).

jaylee · Post by **jaylee** » Mon Sep 17, 2012 11:24 am

Dodgey wrote:18mpg is definitely not right btw. I get 28 without trying (on long journeys). 18 is more normal for urban driving (towns etc).

So it don't sound like fuel starvation then....?

dave_aber · Post by **dave_aber** » Mon Sep 17, 2012 11:27 am

My vote goes to the vac pipe on the fuel injection pump.

Pop up the driver's seat, and look for a 1/4" pipe floating about free near the pump.

genevapay · Post by **genevapay** » Mon Sep 17, 2012 2:46 pm

Right, we've had a good look and no pipes loose anywhere that we can see. Will take it to the place in Hinckley we found, closest place to us here in Coventry I believe.

The problem is the engine is covered in a thick layer of soot, as this happened before we got it and was the reason for the exahust manifold change. Whats the best way to clean this off without damaging anything? Is a jetwash too harsh? It's hard to see what is going on!

Thanks
Rebecca

321Away · Post by **321Away** » Mon Sep 17, 2012 3:26 pm

fuel pump timing or intake seal, injectors, tps, blocked intercooler, clogged fuel filter (or banjo as Mike said).

How does it run/accelerate on the flat?

Julian

genevapay · Post by **genevapay** » Mon Sep 17, 2012 3:29 pm

321Away wrote:fuel pump timing or intake seal, injectors, tps, blocked intercooler, clogged fuel filter (or banjo as Mike said).

How does it run/accelerate on the flat?

Julian

Will ask the mechanic to check those things, as they mean little to me. Might not be able to afford to take it for a while though.
It runs and accelerates fine on the flat. We go about 60mph on motorways.

Thanks

321Away · Post by **321Away** » Mon Sep 17, 2012 3:49 pm

next time you take it up a hill try using the 'HOLD' button and see what happens?

Julian

genevapay · Post by **genevapay** » Mon Sep 17, 2012 4:19 pm

321Away wrote:next time you take it up a hill try using the 'HOLD' button and see what happens?

Julian

Hit hold by mistake once and it wouldn't stop flashing thereafter for about a week. Bit wary of that button

jaylee · Post by **jaylee** » Mon Sep 17, 2012 4:23 pm

genevapay wrote:it wouldn't stop flashing thereafter for about a week.

"Limp home" mode...???

genevapay · Post by **genevapay** » Wed Feb 13, 2013 9:02 pm

We've had a service and they seem to have got to the bottom on the problem. and it's expensive!
The turbo gasket has been blowing out hot soot onto the air inlet pipe (official name air funnel apparently!) and has melted it down so only a small amount of air gets through. The gasket needs replacing and engine cleaned up which is cheap BUT the air inlet pipe, which goes round the back of the engine from the air box to the turbo, needs replacing.
The mechanic says you can't get a replacement from anywhere but Japan as it's originals only and it's £250! He is looking into bongo breakers but does anyone have any ideas? Also does this sound like a reasonable explanation?
Thanks

windywatson · Post by **windywatson** » Wed Feb 13, 2013 10:20 pm

Hi,
Sounds good to me. If the pipe has been collapsed, it has effectively stranggling the engine by limiting air flow. This will aslo account for the increased fuel consumption as the engine will have been under preforming and you will have effectavely been compensating with your right foot.
Whilst you may think that the van has been running well on the flat, I expect once sorted out you will soon realise the differance.
You shouldn't have to get a new part as there are plenty of breakers for these vehicles now. If the garage struggles to find one I would suggest that you ring around some of the long time established importers and get thier help to source the part.

Best of luck

Cheers

genevapay · Post by **genevapay** » Wed Feb 13, 2013 10:33 pm

Thank you. Yes, it does seem to make sense, even to my feeble non mechanical mind.

Northern Bongolow · Post by **Northern Bongolow** » Wed Feb 13, 2013 10:39 pm

talk to ian at bongo fury hq. this happened to his bongo.
fixed for a pint of beer

.

Titan1995 · Post by **Titan1995** » Wed Feb 13, 2013 10:56 pm

Is it particularly noisy all the time? Intercooler pipe off.....as pictured.

Post by **Simon Jones** » Wed Feb 13, 2013 11:10 pm

genevapay wrote:... BUT the air inlet pipe, which goes round the back of the engine from the air box to the turbo, needs replacing.
The mechanic says you can't get a replacement from anywhere but Japan as it's originals only and it's £250! He is looking into bongo breakers but does anyone have any ideas? Also does this sound like a reasonable explanation?
Thanks

£30 cheap enough? http://www.ebay.co.uk/itm/MAZDA-BONGO-F ... 3a7dc73644

Any Bongo breaker will be able to supply one. I may even have one in my spares box.

Very slow uphill and less than 20 mpg - Help

Re: Very slow uphill and less than 20 mpg - Help

Re: Very slow uphill and less than 20 mpg - Help

Re: Very slow uphill and less than 20 mpg - Help

Re: Very slow uphill and less than 20 mpg - Help

Re: Very slow uphill and less than 20 mpg - Help

Re: Very slow uphill and less than 20 mpg - Help

Re: Very slow uphill and less than 20 mpg - Help

Re: Very slow uphill and less than 20 mpg - Help

Re: Very slow uphill and less than 20 mpg - Help

Re: Very slow uphill and less than 20 mpg - UPDATE

Re: Very slow uphill and less than 20 mpg - Help

Re: Very slow uphill and less than 20 mpg - Help

Re: Very slow uphill and less than 20 mpg - Help

Re: Very slow uphill and less than 20 mpg - Help

Re: Very slow uphill and less than 20 mpg - UPDATE