Fitian, I think I know what your problem is now. This morning I installed the original Delphi cartridge that came with my new CAV when I broke the glass on my original one. After 30 km or so, I began experiencing the same symptoms as you did with the car losing power, and I had to switch over to diesel for the rest of my journey home from Newcastle to Maitland. As you know, I have a heater in front of my lift pump as well, which boosts my oil temp to 100degC. While on the way home, I had two more attempts at running on Veg, and on each occasion the 300D started to stutter, so I had to switch to diesel quickly.

I know that the system was primed OK, as I have done the routine many times before, and my trip down to N/C on veg was quite normal. I'm almost positive now that it is the Delphi cartridge that is the culprit.

I've just opened up the Delphi. As expected there was no plugging of the paper element (it was NEW). However, one thing was obvious, the element was holding a lot of oil - much more than I noticed when I pulled the Fleetguard one apart.

What I think is happening is that the heat affects the Delphi's paper element in some way which causes it to swell and block the passage of the oil, thus causing fuel starvation. When you added biodiesel, it thinned the oil enough that it was able to pass through the filter OK, so your car then ran without a problem.

Try another brand of filter cartridge, as I'm 90% certain now that it is the Delphi causing the problem. I'll be 100% certain on Monday once I've travelled to and from work without problems using a Fleetguard cartridge.

If anyone is using the Delphi CAV filter housing, what brand of filter cartridge are you using successfully?

__________________
Cheers
Bruce
http://oztayls.blogspot.com/

1976 W123 300D (3 litre 5-cyl NA diesel running on SVO since June 2006)
1982 W126 280SE (Sadly is For Sale)
1993 W124 300D (3 litre 6-cyl NA diesel - being converted to SVO)

Fintan- The pollak valve does not change with the absence of voltage, it will stay where it is. The two leads into it (that are not the fuel guage wires) get electricty going one way or the other for diesel and veg, and it changes when the power is reversed from what it just was (so as you are driving, if your alternator dies and the battery goes flat the car will not change the fuel it runs on). As it comes from the box could be either way. (so basically I dont agree, but hey I have been wrong before! )

Bruce- I am running a "vapourmatic company england" (which came from Gambier west hydraulics). It seems not to suffer whatever you guys are suffering.

Tony- Oonce again I have learnt something from the master! I will go and check my system for leaks to help its starting. (ever time the car coughs I get reminded of the time I got stuck in the wee hours of the morning )

__________________
cheers
Chris.
1990 landcruiser 80, 1HD-T two tank, copper pipe HE+ 20 plate FPHE, toyota solenoids and filters. 1978 300D, elsbett one tank system. 1979 300D veg oil/ diesel blend for now.

Hello fine people,

Tony, thanks for help there. I went to check all the fuel lines from start to finish looking for any restriction but it all fine.

Bruce, thank for the thinking too. I just bought a new ryco cartridge but did not get a chanse to get my hands dirty yet . I'll replace it and let you know. I hope that this is the problem.

Chris, Hello mate, I must have misunderstood the digaram for the valve and must have picked up the wrong idea. No harm done I guess. Thanks for the correction bro.

--------------------------------

Today I drove to the shops and while looking for a spot to park the car, I looked in the mirror to find a pregnant woman vomitting. I jumped out of the car to offer her help but she said nothing but "It is all because of your stinky smelly car" Is there a way to reduce the smell of the veg oil?

Cheers,

Fitian

Rose oil?

__________________
Cheers
Bruce
http://oztayls.blogspot.com/

1976 W123 300D (3 litre 5-cyl NA diesel running on SVO since June 2006)
1982 W126 280SE (Sadly is For Sale)
1993 W124 300D (3 litre 6-cyl NA diesel - being converted to SVO)

Having said about my filter, my fuel system does not get to 100 degrees.

Perhaps the woman was in denial about being pregnant, and did not wish to admit to morning sickness? Or a garbage truck went past close by at the same time?

No worries on the pollack valve, It may save some confusion.

__________________
cheers
Chris.
1990 landcruiser 80, 1HD-T two tank, copper pipe HE+ 20 plate FPHE, toyota solenoids and filters. 1978 300D, elsbett one tank system. 1979 300D veg oil/ diesel blend for now.

Bruce,
If the filter was leaking fuel, it most likely was allowing air in as well. If the seals are not seated correctly, this can cause fuel leaks and air ingress.

The only issues I have had with the Delphi were in relation to cold - warm oil (my FPHE is after the filter), where the flow was more restricted on the Delphi than on the Ryco.
Tony

I changes the CAV filter cartridge , pushed a 1/2" ID hose on top of the CAV top bolt and sucked air/oil them primed the system but still idleing rough. I did not notice much difference with the new cartridge and the old one looked as good as new. Not sure what else should be done. Please help.

Also A diesel mechanic told me to reverse the flow so that the fuel goes into the bowl and then back through the filter element, that way any crap or water ends up in the bowl rather then in the element. Is that right?

Regards,

Fitian

Hi Tony

Fitian didn't mention he had a leak, but I suppose it's possible that air is getting in, causing the stuttering. That wasn't the case with mine though. I feel certain the problem was the Delphi cartridge due to the quantity of oil the element was holding, and it is blocking up when it gets hot.

Hi Fitian

If he is right, then why have the Delphi filter designers put arrows on the ports? There would be no harm done though.

To test the CAV, you could bypass the CAV altogether and install temporary clear filters instead. If it then runs fine, you know that the CAV is the problem. If it still stutters, the problem is somewhere else.

__________________
Cheers
Bruce
http://oztayls.blogspot.com/

1976 W123 300D (3 litre 5-cyl NA diesel running on SVO since June 2006)
1982 W126 280SE (Sadly is For Sale)
1993 W124 300D (3 litre 6-cyl NA diesel - being converted to SVO)

Hi Bruce,

I see your point there with the flow direction.

I will bypass the CAV and try.

The element that you by for the CAV is it Fleetguard FF167 or FF167A.

The FF167A is exactly the same as the Delphi element. But the FF167 is 2mm higher and has a bigger hole at one of the ends.

FF167 is sold for $11 while the FF167A is sold for $6.

Which one is the right one please.

Thank you

Fitian

Hi Fitian

FF167A is the one I use. I bought a boxed dozen for $46.

__________________
Cheers
Bruce
http://oztayls.blogspot.com/

1976 W123 300D (3 litre 5-cyl NA diesel running on SVO since June 2006)
1982 W126 280SE (Sadly is For Sale)
1993 W124 300D (3 litre 6-cyl NA diesel - being converted to SVO)