Fuel in oil & poor performance

[Cai]

Hello,
I recently bought Bongo 2.0 petrol 2006 and the power it delivers feels about half of what it should. I have another bongo which is 5 years older with double the miles and runs twice as fast & smooth as my new one. So I checked the oil and smelled fuel in the oil (oil looks brand new and feels perfect) and then pulled out the spark plugs to see a wet plug on cylinder 4. I'm going to replace the injectors, fuel filter and do a proper clean of the fuel system. Does anyone know which injectors the 2.0 petrol uses? I believe it is the INP-784, but I've seen same engine use different CC injectors.

Also, has anyone changed the injectors on the 2.0, is it possible to slide the fuel rail out without taking the manifold off? Any information on this would be a massive help as I can not find any information on anyone doing this

Thanks

[Doone]

I can't find 2l injectors mentioned on the forum. You could get the part numbers from the Lush Projects diagrams and ask your local Mazda dealer. https://igmaynard.co.uk/bongo/forum/vie ... 17#p336881

[davidbravo]

Hi Cai,

It sounds like you’re on the right track with replacing the injectors and cleaning the fuel system. For the 2.0 petrol, it usually uses INP-784 injectors, but some variants differ. Yes, it’s possible to remove the fuel rail without taking off the manifold, but it can be tricky. Good luck!

[g8dhe]

Your aware of the mechanical diagrams https://www.lushprojects.com/bongoparts ... Ctr.html#2 with the full part numbers in the table top right on each page which will open if you click the diagram part number ?

[Grimoh1]

Hello,
I recently bought Bongo 2.0 petrol 2006 and the power it delivers feels about half of what it should. I have another bongo which is 5 years older with double the miles and runs twice as fast & smooth as my new one. So I checked the oil and smelled fuel in the oil (oil looks brand new and feels perfect) and then pulled out the spark plugs to see a wet plug on cylinder 4. I'm going to replace the injectors, fuel filter and do a proper clean of the fuel system. Does anyone know which injectors the 2.0 petrol uses? I believe it is the INP-784, but I've seen same engine use different CC injectors.

Also, has anyone changed the injectors on the 2.0, is it possible to slide the fuel rail out without taking the manifold off? Any information on this would be a massive help as I can not find any information on anyone doing this

Thanks

Hi — and welcome to the sometimes maddening, often rewarding world of Bongo ownership! You've got a good nose for issues already — the fuel smell in the oil and the wet plug on cylinder 4 are clear signs of injector leak-down or stuck-open behavior, possibly causing washdown and compression loss on that cylinder over time. Smart move to act quickly.

[Grimoh1]

Hello,
I recently bought Bongo 2.0 petrol 2006 and the power it delivers feels about half of what it should. I have another bongo which is 5 years older with double the miles and runs twice as fast & smooth as my new one. So I checked the oil and smelled fuel in the oil (oil looks brand new and feels perfect) and then pulled out the spark plugs to see a wet plug on cylinder 4. I'm going to replace the injectors, fuel filter and do a proper clean of the fuel system. Does anyone know which injectors the 2.0 petrol uses? I believe it is the INP-784, but I've seen same engine use different CC injectors.
Also, has anyone changed the injectors on the 2.0, is it possible to slide the fuel rail out without taking the manifold off? Any information on this would be a massive help as I can not find any information on anyone doing this

Thanks

As for the fuel rail removal, yes—it is possible to slide the fuel rail out without fully removing the intake manifold, but you’ll likely need to unbolt and carefully shift the upper manifold section or throttle body for clearance. It’s tight, but doable with patience and the right socket extensions. Be sure to depressurize the fuel system first and have new O-rings ready.