diesel spam

[Unclejake]

On 13/05/2024 at 19:47, Unclejake said:

 

4 cylinder non turbo Perkins 4-236 with perhaps 6,000hrs in a JCB backhoe loader...... took 45 mins to drive 12kms 

 

After clearing out the fuel system and sealing the lift pump leak the same trip took 36 mins this afternoon

It's still hellishly noisy, but too wet and cold to pull the rocker cover off today

[dmulally]

Hello all

Nissan ED33 from a bus. Does anybody know what this line is that is hanging off the back of number 4 injector? 

[Mof]

It's a return line, you see it goes to a banjo off all 4 injectors. 

[dmulally]

3 hours ago, Mof said:

It's a return line, you see it goes to a banjo off all 4 injectors. 

Ta. It's blocked up so I didnt know what it did. If that's the return line, what is the line at the back of the injector pump with the small white filter on it? I thought that was the return. 

I got the engine running with a hose into a erry along with the inlet hose into the same jerry so couldnt see which was doing what. Runs like a bag of shit but I dont think it has been running in 30 years so it is what it is. 

 

[Mof]

The injector returns to the fuel pump. At full throttle if the pump is supplying more fuel than the injectors can handle then it returns.

The fuel pump has a return also back to the fuel tank

[dmulally]

15 hours ago, Mof said:

The injector returns to the fuel pump. At full throttle if the pump is supplying more fuel than the injectors can handle then it returns.

The fuel pump has a return also back to the fuel tank

Ta. Do you know roughly where on the pump the small line from the injector goes to? Would it help if I took a few happy snaps? 

[Raizer]

11 minutes ago, dmulally said:

Ta. Do you know roughly where on the pump the small line from the injector goes to? Would it help if I took a few happy snaps? 

I'd say that one.

[dmulally]

39 minutes ago, Raizer said:

I'd say that one.

That one goes into the block.

[Raizer]

35 minutes ago, dmulally said:

That one goes into the block.

Ah interesting, on several others that's the spot for the return.

[dmulally]

What I might do is unclog it at the end and when it's warmed up give it the jandal to see if anything comes out. If it does I'll loop it back to the fuel tank somehow. 

The only problem I'm worried about is if when revving it out the smoke that comes out will bring unwanted attention from the ladies. We all know what soot gets. 

[Mof]

4 hours ago, dmulally said:

Ta. Do you know roughly where on the pump the small line from the injector goes to? Would it help if I took a few happy snaps? 

Yeah that's as far as my memory goes. There must be a little hose tail or something back there for it to go to. Tbh I never took a lot of pumps off, heads and injectors yes.

[Hemi]

Man I'm jogging my memory hard but it doesn't go to a 2 way banjo does it? Just straight back to the tank with the return

One outlet on banjo for main return, one tiny one for the injector

[dmulally]

13 hours ago, Hemi said:

Man I'm jogging my memory hard but it doesn't go to a 2 way banjo does it? Just straight back to the tank with the return

One outlet on banjo for main return, one tiny one for the injector

Perhaps. It's just chopped off and clogged full of ancient oil and grease at the moment but I did think about plumbing it into a T piece on the return line from the back of the pump.

[Sunbeam]

Hello experts. I have acquired a PJ Ranger that misses and huffs raw diesel out the tailpipe from cold start. When warm it runs mint and goes hard. I removed and tested the glow plugs. They seemed ok but looked 1000 years old, so I fitted a fresh set. No difference. Is there injector behaviour that could cause this? I kinda thought overfuelling made black smoke, and there is none under any circumstances.

[Hemi]

3 minutes ago, Sunbeam said:

Hello experts. I have acquired a PJ Ranger that misses and huffs raw diesel out the tailpipe from cold start. When warm it runs mint and goes hard. I removed and tested the glow plugs. They seemed ok but looked 1000 years old, so I fitted a fresh set. No difference. Is there injector behaviour that could cause this? I kinda thought overfuelling made black smoke, and there is none under any circumstances.

No Expert on rangers or lighter vehicles but that sounds like a blocked, worn or cracked injector. raw fuel/ white smoke is unburnt diesel, not partially burnt ( black) . essentially super hot diesel vapor.
I'd check them 100% as if its the pattern or port worn/damaged it might end up gas axing its way through the piston. 

[Hemi]

Maybe more a @Yowzer or @AllTorque question? ( for lighter vehicles, not the brand specifically)

 

[Hemi]

wait, glow plugs. 

yeah I'm out of my depth here. direct injector for lyfe

[Sunbeam]

22 minutes ago, Hemi said:

wait, glow plugs. 

yeah I'm out of my depth here. direct injector for lyfe

It’s common rail.

[mjrstar]

Time to check that it has compression on all the cylinders.

[Sunbeam]

8 minutes ago, mjrstar said:

Time to check that it has compression on all the cylinders.

Probably. It had a new head etc a few months ago. I have also found some damning evidence in the glovebox, a receipt for injector testing and cleaning with a comment that they “failed in some areas, customer advised”