nickholywood

SGNAS / LITTLUN Am I right in thinking that no diesel should be able to travel up the boost pipe towards the injectors? I was able to suck diesel up this pipe from the injector this evening, which by my thinking means the diaphragm is shot because there is supposed ot be only air on the turbo side, and fuel on the pump side. I am assuming the boost pressure in some way causes the item to flex and increase fuel flow to the injectors as turbo power increases?

Littlun - cheers mate. My problem is loss of power so i am working my way back from the turbo. I hear the diaphragm is an easy one to overlook. Thanks again. nick

Hi Sgnas Thanks for your reply. I am ruling out the diaphragm now as I have non of these symptoms. The tapping/knocking noise is louder now. I can hear it most distinctly through the air filter. It's not banging though. No smoke. I lifted the oil breather cap off and there is a bit of smoke there puffing out but I assume this is normal. It's not overheating. I didn't find water in the oil. Could be the head gaskett I guess? If it is, the noise is making it's way to the air filter. Does this make any sense? It's a bit like diesel knock, only louder. The pace is in line with each revolution.

Hello there guys I am tortured with low power at present. 1988 Diesel Turbo 90. Fine in 1st and second but 3 to 5 are sluggish- feels like no juice is getting through even on full pedal. Max speed is 55 tops and maybe 45 on a slope. Oh dear! Turbo is fine. The rubber downpipe from turbo is fine inside. It is rubber and therefore flexible but the body inside and out is not cracked and it is keeping it's shape. I changed the accentuator arm diaphragm, and the turbo boost pipe - fuel pump. I can blow through it into the pump. There does not appear to be any fuel leak on the pump. The lift pump lever did work to get rid of air after a fuel filter change BUT, the hand pump arm is no longer working - no pressure. I am beginning to think it may have been working poorly all along. I am fitting a new one tomorrow. I wonder if this talk of fuel boost diapragm is important. It might be worth changing. Can anyone show me a pic of where it is on the CAV pump or is there a pic with arrows and annotation I could look at. Those Hanes books never seem to have good annotated pics of a whole unit. I am also getting a light ticking knock which I can hear via the air filter (K&N) which might suggest air in system? Anyway, any advice is helpful. V best Nick