Not been here in a while got busy with other issues.
HISTORY
I have an 06 CRD that when I got it had the Check Engine Light disabled at least unplugging MAF didn't set off CEL
It started having problems starting and it had previous issues with air in fuel and had some issue with that for sure while my son was away at college driving it. So got it brought home.
It had old style filter head so I replaced that and at same time put the carter in tank fuel pump in so there should be no problems with that now. I also replaced battery since the battery it had was over 3 years old and I needed a starter battery for outboard on fishing boat till fall anyway. It has had ARP studs head gasket and the usual associated work TB water pump etc. and replaced all valves at about 100,000 prophylactically though there might have been the start of a very small head gasket leak.
Present
No codes read ( I think I have read codes on it before but not 100% sure)
Not sure if any codes might have been erased since it last actually ran (if it had any my son may have erased them) and has about 125,000 miles on it
No apparent fuel leaks other than seepage around 3 or 4 injector or both think just number 3 but could be from bleeder valve too.
I disconnected fuel line on side of motor/CP3inserted small funnel in the line and have it full of fuel so there should be NO AIR in line NOW
It starts or tries to NOT ("Missing") for less than a second and quits.
The RPM guage goes up to at least 600 when attempting to start and it hits.
to see if it WOULD read codes I unplugged MAF sensor as well as MERCEDES sensor and reread
Then it read
P 1189
P1140
P1252
All these are related to fuel air metering and felt due to unplugged sensors
P403 EGRflow circuit malfunction (I think this one is explained)
P0203 open cylinder 3 injector circuit
This I believe is related to the problem
When I erased the codes and replaced the sensors though tried to start it a couple of times and reread codes there were none !!! Still acting exactly the same.
I have a set of noid lights somewhere if I can find them but since that code resolved not sure if it was freak code or what. I did check connection to injector 3 and removed and replaced it . There may have been a little moisture or diesel on the rubber grommet but this could be from fuel head bleeding.
I TRIED TO start it without injector 3 connected and it actually ran a little longer like 125 to 150 % of what it had but it definitely missed so I replaced wire to number 3 injector and it went back to original pattern.
Discussion:
If anything to do with low fuel rail pressure I wouldn't expect it to ever start to begin with
If Crank position sensor shouldn't start at all or should run normal a while then totally quit and maybe start back in a few minutes
If cam sensor ? shouldn't be showing RPM at all and apparently correct.
It is definitely getting fuel with NO AIR in it now.
Possibilities:
CP3 (I realize this is rare ) but it wouldn't ever start to begin with ? or throw a code?
Fuel return line stopped up? But seems to happen too quickly (guess I could remove it at the return block ? would throw a code.
Timing skipped some . I could check timing pins to see but starts pretty quick like its in time cylinders seem to have same compression on starting but haven't turned by hand yet.
I am thinking about swapping number 3 injector ( I have spares) next or confirming timing\
Guess I could check with noid lights or remove and replace plugs on ECM to check connections there or possibly check continuity on pins to number 3 injector
Any helps or other suggestions etc APPRECIATED !
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Another update :GREAT NEWS FOR ME !!!
