I had previously posted this as a Rough Idlle problem.
My mechanic has worked out there is no fuel getting to one cylinder. Compression is fine in all 4. No warning light. No codes.
Tomorrow he will try swapping two injectors and see if the fault follows the injector or not. Hopefully it is not the $$$$pump.
I'd really appreciate suggestions particularly from anyone with a similar experience.
thanks
Bob
Hi Bob,
Sorry to hear of your problems.
If the compression on all 4 cylinders is OK I guess you can breathe one sigh of relief. A pump rebuild is a lot less than an engine rebuild.
Look forward to hearing the final diagnosis.
Sorry to hear of your problems.
If the compression on all 4 cylinders is OK I guess you can breathe one sigh of relief. A pump rebuild is a lot less than an engine rebuild.
Look forward to hearing the final diagnosis.
Plan A was to swap two injectors and see if the fault followed the injector. They were a bit hard to get out and needed a bit of a tap.
Swapped injectors and problem disappeared!!
Thought it best to replace the injectors (300K kms).
New injectors worked fine. Took it for test. 5km and the fault came back!
No fuel getting to #1.
Why would the pump not send fuel to just one cylinder??
How could a fuel line get blocked??
Ideas anyone?
Replacing the pump looks like a terrible job. Does any one have any tips?
Swapped injectors and problem disappeared!!
Thought it best to replace the injectors (300K kms).
New injectors worked fine. Took it for test. 5km and the fault came back!
No fuel getting to #1.
Why would the pump not send fuel to just one cylinder??
How could a fuel line get blocked??
Ideas anyone?
Replacing the pump looks like a terrible job. Does any one have any tips?
Bob
I am not sure on the inner workings of the pump but assume that as the injectors are "dumb" injectors on your pre-common rail engine, that the pump needs to be "intelligent" and does the deciding on which and how much diesel needs to go to each injector(Guessing here as I count beand for a living)? Might be blocked fuel line but I doubt it as then it should be block constantly? I think it is the pump that works up to an allowable stage and if not getting sufficient pressure, due to wear, shutting it down by some way? But then it should throw an error on the pump side if you do the DIY error code testing with the earthing of pin 1, which you say does not give a code???
If possible maybe swap pump with another one for a while? How did your machy determine that no fuel reached that cylinder? I am still wondering on the bust piston as an option?
Interesting problem though - Please keep us updated on your progress as I will be following your elimination with interest, just coming from a complete pump and engine rebuild recently myself, and now struggling with some overheating problems.
CATS
I am not sure on the inner workings of the pump but assume that as the injectors are "dumb" injectors on your pre-common rail engine, that the pump needs to be "intelligent" and does the deciding on which and how much diesel needs to go to each injector(Guessing here as I count beand for a living)? Might be blocked fuel line but I doubt it as then it should be block constantly? I think it is the pump that works up to an allowable stage and if not getting sufficient pressure, due to wear, shutting it down by some way? But then it should throw an error on the pump side if you do the DIY error code testing with the earthing of pin 1, which you say does not give a code???
If possible maybe swap pump with another one for a while? How did your machy determine that no fuel reached that cylinder? I am still wondering on the bust piston as an option?
Interesting problem though - Please keep us updated on your progress as I will be following your elimination with interest, just coming from a complete pump and engine rebuild recently myself, and now struggling with some overheating problems.
CATS
2009 Pajero 3.2 DiDc Lwb GLS (Gen4) - Casper (Starting to grow on me)
2001 Pajero 3.2 DiD Lwb GLS Manual (Gen3) - Snoopy (SOLD but not forgotten)
2008 Pajero 3.2 DiDc Lwb GLS Auto (Gen4) - Silvester (SOLD)
2001 Pajero 3.2 DiD Lwb GLS Manual (Gen3) - Snoopy (SOLD but not forgotten)
2008 Pajero 3.2 DiDc Lwb GLS Auto (Gen4) - Silvester (SOLD)
I can't disagree with your logic Cats.
The injection of fuel into any one cylinder must be triggered by something mechanical or electronic - and the injectors have neither.
The "no fuel to #1" was determined by disconnecting ite fuel line. Other disconnected fuel lines showed fuel, it had none.
When swapping the injectors seemd to fix the problem, my mechanic began to doubt his fuel observation (he was working on his own, so no criticsm).
He is going to think about it for the weekend and I will see what Monday brings
regards
Bob
The injection of fuel into any one cylinder must be triggered by something mechanical or electronic - and the injectors have neither.
The "no fuel to #1" was determined by disconnecting ite fuel line. Other disconnected fuel lines showed fuel, it had none.
When swapping the injectors seemd to fix the problem, my mechanic began to doubt his fuel observation (he was working on his own, so no criticsm).
He is going to think about it for the weekend and I will see what Monday brings
regards
Bob
injector pump has been sent off for testing. I will post the results.
I do now know more about the way the injector pump works,
It has cams that produce pulses of fuel. There is a revolving device that funnels that pulse of fuel to the appropraite cylinder.
There is no external evidence of damage. One possibility is some internal crack or failure,
Normal symptoms of an injector pump failure is hard to start, and then lots of smoke. The diesel service people have never heard of my problem.
The pump is difficult to remove, difficult to rebuild, difficult to test, and very difficult to install. Did I also mention it is very expensive
I'm going to start a separate thread to request the timing settings. It would nice to have confirmation of the notes taken on removal.
bob
I do now know more about the way the injector pump works,
It has cams that produce pulses of fuel. There is a revolving device that funnels that pulse of fuel to the appropraite cylinder.
There is no external evidence of damage. One possibility is some internal crack or failure,
Normal symptoms of an injector pump failure is hard to start, and then lots of smoke. The diesel service people have never heard of my problem.
The pump is difficult to remove, difficult to rebuild, difficult to test, and very difficult to install. Did I also mention it is very expensive
I'm going to start a separate thread to request the timing settings. It would nice to have confirmation of the notes taken on removal.
bob
Dont be fooled!!
There's diagnostic systems, and there are DIAGNOSTIC systems!
My Pajero was really ill a while ago, but NO error codes! NOTHING!
Took it to Koos Swanepoel in Stikland CPT, and IMMEDIATELY a whole list of errors came up, caused by the barometric pressure sensor failure. It took them probably 50 seconds to diagnose while it was sent back THREE times to another(reputable) engine rebuilder in CPT before, where there was NO codes!
Have it checked somewhere else...even if you have to pay the stealers their R600 for it!
There's diagnostic systems, and there are DIAGNOSTIC systems!
My Pajero was really ill a while ago, but NO error codes! NOTHING!
Took it to Koos Swanepoel in Stikland CPT, and IMMEDIATELY a whole list of errors came up, caused by the barometric pressure sensor failure. It took them probably 50 seconds to diagnose while it was sent back THREE times to another(reputable) engine rebuilder in CPT before, where there was NO codes!
Have it checked somewhere else...even if you have to pay the stealers their R600 for it!