Thread: 300TDi pump tweak puffs of black smoke

Is that what it looks like from the driver's seat or have you observed it from outside the vehicle?

Is it possible that there is a steady stream of black smoke from the exhaust, but the turbulence behind the vehicle makes it look like a series of puffs?

Originally Posted by vnx205

Is that what it looks like from the driver's seat or have you observed it from outside the vehicle?

Is it possible that there is a steady stream of black smoke from the exhaust, but the turbulence behind the vehicle makes it look like a series of puffs?

From inside the car. Never taught of that. Need to get an observer to confirm. Thanx!!!!

More to the point, does it go better ?

Deano

Originally Posted by DeanoH

More to the point, does it go better ?

Deano

Yup, bit better, not a rocket, but better than before, especially from standstill!!!

Still need to do fine tuning, this was just a rough change. Two turns in for smoke screw, bit shy of 90 degrees for cone. Didn't touch spring preload ring. EGT is still good, where it hit 350 before, now it hits 400-420. Haven't tried any long inclines on 110 km/h or so yet.

I've just recently done much the same 2 turns smoke screw and rotated diaphragm 90 degrees so dot marker is at 12 oclock which is them giving full fuelling. I am able to hit EGTs of 700 and beyond very easily if I plant the foot. Is your probe an extended one or standard length? And I'm assuming mounted in EGR blanking plate?

Pete

Originally Posted by ROAMER_AUS

Still need to do fine tuning, this was just a rough change. Two turns in for smoke screw, bit shy of 90 degrees for cone. Didn't touch spring preload ring. EGT is still good, where it hit 350 before, now it hits 400-420. Haven't tried any long inclines on 110 km/h or so yet.

Originally Posted by discopete

I've just recently done much the same 2 turns smoke screw and rotated diaphragm 90 degrees so dot marker is at 12 oclock which is them giving full fuelling. I am able to hit EGTs of 700 and beyond very easily if I plant the foot. Is your probe an extended one or standard length? And I'm assuming mounted in EGR blanking plate?

Pete

Hi Pete,

12 o'clock doesn't have to be full fueling. On mine, I can see that it has been adjusted before. I didn't take apart actual diapraghm from the excentric cone shaft, but on mine the dot is in about 1/2 of full fueling position. Mine was 3 o'clock, and I turned it to 12 which gave me 3/4 of full fueling. I didn't study it much as I had to reassemble in a hurry, but will have a closer look next time it's off.

EGT probe is mounted in EGR blanking plate and it sticks about 7cm inside the housing.

As I said, I didn't try any long inclines under full load yet. Max I was able to get out of it on short bursts of acceleration was 500. It may be slower response probe.

How's your smoke? Is it visible with those settings?

Originally Posted by ROAMER_AUS

Hi Pete,

12 o'clock doesn't have to be full fueling. On mine, I can see that it has been adjusted before. I didn't take apart actual diapraghm from the excentric cone shaft, but on mine the dot is in about 1/2 of full fueling position. Mine was 3 o'clock, and I turned it to 12 which gave me 3/4 of full fueling. I didn't study it much as I had to reassemble in a hurry, but will have a closer look next time it's off.

EGT probe is mounted in EGR blanking plate and it sticks about 7cm inside the housing.

As I said, I didn't try any long inclines under full load yet. Max I was able to get out of it on short bursts of acceleration was 500. It may be slower response probe.

How's your smoke? Is it visible with those settings?

No I should have clarified on mine it is full fuel. There is a bit of smoke but I haven't had someone monitor from behind yet. Doing a bit more adjusting on Sunday so I'll let you know how we go. I'm using an exposed tip probe. Keep us posted on your results, its always interesting to compare.

Pete