Help needed, what next ?

This site contains affiliate links for which LandyZone may be compensated if you make a purchase.
found the receipt in the man style filing cabinet pile of junk in the kitchen so i'll ring them tomorrow.

might get a new modulator too, then i'll be sure of everything from the turbo to the inlet manifold except for the APP and MAP sensors.

needless to say, i'm not happy :mad:
 
the only other thing that bothers me is the history of how it all started.

it started loosing power slowly, then the fuel line sprang a leak, after fixing the fuel line, screaming turbo, black smoke, only 1500rpm.

I did clean the sedimenter and change the fuel filter but did taking the tank out unsettle something ? there was a kink in the small breather pipe.

during this problem I took the fuel pump out and cleaned the mesh filter, it looked a bit brown and I did wonder if it was water.
 
there might be some wiring issue on the MAF circuit though as those readings are too low, should be above 200 at 1500rpm growing to around 600 at full throttle and the MAP starts at AAP reading then go to 230kPa on full boost.
 
I'm reluctant to do too much at the same time with a non runner as you can easily bugger somthing else fanning about and not even notice!!

Modern diesels are a right basterd to start once that have got air in the system, I don't reckon the purging cycle on a TD5 does a lot of good to be honest as you still have to crank the bloody thing for at least 30 seconds before you get a hint of a fireing !!
 
hi Jason,

even after the huge list of parts on off in out, she still starts on the button first time every time, it just won't rev above 1500 and black smoke everywhere,
the MAF readings are way out of whack and there doesn't seem to be any boost ?
 
Sorry mate got fuddled up ! so many threads about non starting TD5's at the moment !

Do you have a snorkel ? could it be blocked ? Your going to get low MAF readings if there's no air getting through.

Exactly the same symptoms as when one of my turbo hoses was blocked.

Good luck
 
no, no snorkel yet ! ;)

standard air box, completely removed, cleaned and replaced, even ran the nanocom test without the air filter as sierrafery suggested to see if I got a better MAF reading, no change.
 
Black smoke suggest that its fuel related, or getting to much fuel to the air coming in which is what everyone's been saying with turbo and boost hoses, so unfourtunatly I can't really help :D. However I would have expected a fault to be logged if it was over boosting, from past experience I would be suspicious of the pump, see if you can do a pressure check on the high pressure side, simplest thing to do is get someone to turn the ignition on while you squeeze the fuel pipe going to the pressure regulator and check how hard it gets against a known good in. the injectors don't normally give bother but the harnesses do, but it gives different symptoms. Something to check though. I'm intrigued to find out what is wrong good luck
 
thanks, will try this.

it has to be either electrical or fuel related surely ?

it's the MAF AAP and MAP readings that are so confusing which leads to electrical.

as said before, it was loosing power slowly and not by much, enough to make you think air filter or MAF.

the only thing changed before the black smoke was the fuel lines.
 
are you sure the fuel lines were reconnected the right way not mixed the ports at the pump of at the FPR?

The AAP sensor would not affect the MAF but it could limit the boost if it's faulty
The AAP sensor is located in the top of the air filter housing. It provides voltage signals relative to both ambient air
pressure and temperature to the ECM. The AAP sensor produces a voltage between 0 and 5 volts proportional to the
pressure level of the air in the air filter housing. A reading of 0 volts indicates low pressure and a reading of 5 volts
indicates high pressure. The ECM uses the signal from the AAP sensor for the following functions:
l To maintain manifold boost pressure.
l To reduce exhaust smoke emissions while driving at high altitude.
l Control of the EGR system.
The sensor also supplies a voltage between 0v and 5v proportional to ambient temperature. The ECM uses this signal
for the following functions:
l Exhaust gas over temperature protection.
l Turbocharger overspeed protection.
.........
The AAP sensor can fail the following ways or supply incorrect signal:
l Sensor open circuit.
l Short circuit to vehicle supply.
l Short circuit to vehicle earth.
l Contaminated sensor element.
l Damaged sensor element.
l Resistance in wiring harness.
In the event of an AAP sensor signal failure any of the following symptoms may be observed:
l Altitude compensation inoperative (engine will produce black smoke).
l Active boost control inoperative.
l Turbocharger boost pressure limited to 1 bar (14.5 lbf.in 2 ).
l EGR altitude compensation inoperative.
The MIL will not illuminate in an AAP sensor failure, and the ECM will use a fixed default value from its memory.
Click to expand...
 
OK,

Want a bit of feed back before I go and do something really noisy and scare the s**t out of the neighbours.

according to my MAF data, air is not getting in.
could it be more of a case the exhaust gas isn't getting out ?
I believe it has a particulate filter in the exhaust not a cat.

just before it started loosing power i had to do some serious puddle hoping through the lanes on my way to work, on two particular occasions it was quite deep.

could this have effected the particulate filter ?
is there a possibility the exhaust is blocked or at least restricted ?
or am I clutching at straws, do i drop the exhaust at the turbo joint and try it, what are your thoughts ?
 
HA HA HA HA HA HA !
Yes my laugh is that bloody loud :D

split the pipe at the turbo, revved freely to 4 - 5000 rpm
put the nanocom on, MAF 60 at tick over 200 at 2000rpm, don't expect the figures to be spot on as there's no exhaust.

I am currently drinking cider with the biggest grin ever.
thank you all for your help and comments (I know it's not over yet !)

But now the big question is do I go de-cat with the new diesel regs ?
 
Top Bollocks ! Thought it would be somthing simple !

Glad your sorted, just get a de-cat downpipe or if your worried about the MOT #### the cat with an hammer and shake all the bit's out :D
 
You must log in or register to reply here.

Similar threads

pete42
Stranded in Spain, could be worse.
Replies
2
Views
852
pete42
pete42
R
Dying F1 Help
Replies
14
Views
522
Nodge68
Nodge68
JPaussie26
Land Rover wont Idle!
Replies
2
Views
704
marjon
marjon
J
engine cuts out at high revs, eml on td5
Replies
3
Views
631
tom1979
tom1979
KingSam
Disco 2 Td5 non start after deep water
Replies
7
Views
410
D1Nut
D1Nut
Back
Top