Ive done the fuel pressure monitor the other day very bad max 80bar on crank

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Heres the resulthttps://uploads.tapatalk-cdn.com/201...dffc8ff060.jpghttps://uploads.tapatalk-cdn.com/201...998f451255.jpghttps://uploads.tapatalk-cdn.com/201...343f3763d4.jpg

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And the engine was running?! That's not right.

Oh, wait... Misread the display.

It won't attempt to fire until it reaches 240 bar. How long are you cranking?

Try two things...
1/ an extended crank while watching the pressure. Is it climbing? Crank for 15 seconds or so. If the pressure is climbing, go a little longer, but not too much.
2/ get an assistant to crank while you closely watch the lines for bubbles. Watch especially the input of the HP pump.

I have cranked it for about 20 sec for it to reach that pressure ..when giving quick start it fires up instantly and runs smooth ..

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No air bubbles present im running a diesel line from an bottle hanging from the bonnet as the feed line into the filter

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So i have used a fuel rail from a running jeep 2.7 complete with regulator and sensor and still nothing ..i have installed the crank sensor cam sensor fuel rail diesel pump fuel lines all on the other jeep and it runs and starts first time ..mine still does not want to start by itself the fuel pressure now reads a max of 120bar on cranking and spray easy start it fires up

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It really sounds like a faulty injector

Not much else it could be, you would think.

Try disconnecting the fuel return line from injectors. If the volume of return fuel is high, it will create problems with the fuel pressure regulator which may be what's creating your problem.

Quick and easy test.

Brand new injectors ..will send them to bosch and have the checked out ..cant think its injectors once its running its smooth and very little smoke

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When one (or two) of my injectors failed the car was seemingly running perfectly, then it wasn't. It would not start to save it's life so never say never.

Jason

I will have them checked

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These are what i got https://uploads.tapatalk-cdn.com/201...2812f8a9eb.jpghttps://uploads.tapatalk-cdn.com/201...e1bc5e423d.jpghttps://uploads.tapatalk-cdn.com/201...0319c4ba48.jpg

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Seems like it fails to get enough pressure for starting.

I did not go through the entire topic but as usual culprits:
- Air in the system
- Injector(s) with high leak-off
- Worn out high-pressure pump
- Internally leaking fuel pressure regulator

Im back to checking air in the system as the pump injectors regulator and sensor are new

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This jeep is standing since august last year the list of parts purchased are endless but still just cranking

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You mean i should disconnect it at the rail and plug it

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Whats the best procedure to bleeding the system

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You prime it with a hand vacuum pump (or squeeze bulb) via the priming valve on top of the engine. The system self bleeds from there.

Transparent pipe shows air from the filter ive installed a mann filter new orings and pipes again air stays at the filter

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Try replacing the rubber hoses that join back to the steel on the firewall. You can pick them up for a few bucks from the likes of Repco, Supercheap or Autobarn. They are a common source of air leakage. Others have installed check valves in the suction line before the filter.

Back to this darn error code p1130https://uploads.tapatalk-cdn.com/201...cac263a0ce.jpghttps://uploads.tapatalk-cdn.com/201...2160d88714.jpghttps://uploads.tapatalk-cdn.com/201...fbebd90dcd.jpg

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Regulator at 88% at idle looks wrong. It should be around 20%.

Sorry for the slow reply. If you disconnect the fuel return lines from the reg, or remove them from the injectors as a quick and dirty test you won't make much mess. I wouldn't block it, preferably drain in into a contain or use a leak back test kit.

The idea is to see if the volume of return fuel is telling the reg to shut down the engine.

Ive put transparent lines on and its drawing in air from the filter new filter and new lines and orings ..can it be from the pipe coming from the tank? Had an air issue since i removed the tank?

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The valve on the filter can that cause an air leak ive heard about them giving trouble and best to blank it on filter and connect the return line straight

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If i give it more throttle it drops down

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Its goes down once revs go uphttps://uploads.tapatalk-cdn.com/201...b07451bdca.jpg

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It idles smooth ..only when the bubbles apear it runs rough .
Took it for a drive and it goes well until the air is to much and it dies

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What will cause the regulator to work other way round? Air?

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Does anyone have a diagram of the fuel lines from the tank to the engine?

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The best place to look would be the parts manual.

So i did a leak off test and the culprit looks like the pressure regulator at crank it gives to much diesel . I will purchase yet another one and see what is the result

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I ordered a new fuel pressure regulator from bosch coming later this week

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Quickest any part has ever taken to arrive ..got the new regulator

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I have replaced the regulator and primed the system cranked a few seconds and started let it run a bit and switched it off and tried starting it again fired up first time ..cant believe it starts on its own
Ive let it tick over for a while now its got the grunting gallop idle sounds like its missing gave it a bit of revs still the miss is there

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Ive done that test and it showed that on crank the reg is letting to much diesel out

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So the hunt continues with new symptoms now ..installed new bosch fuel pressure regulator together with new bosch feul pressure sensor.. started right up after bleeding the system.. i can switch it off and start it again it fires up first time ..but it looks like its overfueling the engine doesnt sounds happy its the idling is not smooth even on higher rpm if i keep the revs steady i can hear the engine missfiring the diagnostics only shows all injector values jumping up and down fuel pressure aswell the return line pulses diesel out and stops and pulses and stops not a slow steady flow??..it sounds and idles like theres air in the system but the engine is much noisier
Any advice as im stumped because everything has been changed new again and clear fuel lines doesnt show air in the system?

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