Renault T1100 D 1997

Hi does anyone know what the most common engine faults are on these , ive noticed a lot of air bubbles coming through pipe , someone said to me it could be the fuel filter housing diaphram letting air in ?

Are the air bubbles coming from tank to filter or filer to pump?

Filter to pump

I would try all the connections at the filter head, also the filter itself where it connects. You can by pass the filter and filter head just to confirm that area is the problem. Don,t leave it by passed.

ok thankyou do you know of this problem as it ticks over fine but runs erratic under load and stalls when you slow down or take your foot off the gas , i just had a new filter fitted but there doesent seem to be any leaks

Did problem start after filter fitted?

No it was there before it was running badly after I bought it last week it go me back from Durham took 7 hours to bury st eds the filter was change as it seemed it could be  blocked up

Had similar problems on trucks. Try by passing filter head. You say that the bubbles are after filter so it would seem the pick up from tank to filter is ok.

I can't recall now what the Trafic fuel tank is like now, but one possibility is partial blockage of the fuel tank outlet due to 20 years of crud in the tank. That can lead to small bubbles in the fuel supply due to cavitation in the pump. Another could be a leak in the vacuum system - normally this will stop it idling, but it's not always the case, as we found on our Mk2 Transit!

Ok thanks I will try by passing it & take it from there I will let you know when I have tried it out thanks for your input

If bubbles are still present run a pipe direct from tank to same point (you can stick it down filler neck) if no bubbles you know its the pipe from tank or pick up in the tank. Good luck.
Harry.

Hi mate it was the housing I put an in line filter in all sorted

Hi good you now know the problem but bear in mind an in line filter will not filter the same quantity of fuel as the filter head filter. Also check the microns of the   original filter. You don,t want to end up with wear in the pump.

Thanks I will check the mechanic at the garage suggested it he said it was from a VW