Patrol 4x4 - Nissan Patrol Forum banner

1 - 13 of 13 Posts

·
Registered
nissan patroll gu1999 4.2td
Joined
·
6 Posts
Discussion Starter · #1 ·
Hi All, I am new to this forum. Hoping someone can help me with my problem. I have a 1999 GU TD42 non intercooled Factory turbo,17000Km on clock. Engine wont idle, cuts out under 1500 RPM, A lot of white/grey smoke at no load up to 1800RPM,poweer,smoke and fuel consumption ok at 2000RPM+,no power below this, getting worse over 3 months, Hard to start with out ether hot or cold. So far have tried the following-- 1 New oil and filter, new Air and Fuel filters.2 No air in fuel, have bypassed filter with gravity feed to IP with clear tubing. 3Fitted electric pusher pump near tank 12 months ago. 4 Removed fuel inlet thimble/banjo screen to IP. 5 All cylinders drop same revs when injector lines cracked. 6 Injectors removed and checked, advised by diesel shop that is not the problem. 7 Replaced solenoid valve on IP, can hear it clicking. 8 glow plugs and circuit checked ok. 9 Never overheated, no blow by, oil stays clean and does not use oil. 10 intake system not oily. 11 Sucked on airline to IP so think diaphragm is ok, holds vacuum. 13 Advanced IP timing by turning flange clockwise, IE top away from block. Does not use water/coolant. Have scratched head a lot and read al the threads I can find, still no joy. . Thank you in advance.
 

·
Registered
nissan/patrol
Joined
·
370 Posts
Did this start after you adjusted the timing? Did you adjust timing with dial gauge, or simply rotate pump.
 

·
Registered
nissan patroll gu1999 4.2td
Joined
·
6 Posts
Discussion Starter · #3 ·
All remedies were after the problem started, except for the electric pusher pump, that did not seem to cause a problem at the time. Thanks for the speedy reply.
 

·
Registered
Joined
·
170 Posts
We once had a work ute that the sexytary filled with petrol instead of diesel that did a similar thing but it had no power at all thru the rev range but didn't stop her from driving it.
 

·
Registered
nissan
Joined
·
511 Posts
Looks like a problem with Injection pump. Maybe internal advance mechanism siezed.
 

·
Registered
nissan patroll gu1999 4.2td
Joined
·
6 Posts
Discussion Starter · #7 ·
More Information please

Hi all. Question to Azotek . If it is a problem with the internal advance mechanism , is it something I can do myself or is it a specialist job? Is there somewhere on this site I can get a guide to repair this? I am handy with the tools.
 

·
Registered
Joined
·
124 Posts
Any internal components would be best left for a shop with the right gear.
Sure you could pull it down and maybe even fix it up but 1 thing with diesel pumps I know for sure is that it doesn't need to be much wrong to make a big difference. Small amount of dirt, minor adjustment etc... could render it completely useless.
I would leave it to the experts if it were me
 

·
Registered
nissan patroll gu1999 4.2td
Joined
·
6 Posts
Discussion Starter · #9 ·
Update Wont idle.

Hi all and thanks for your input so far. Have been doing research on this forum and other places as found on the internet. Have cured the (white)smoke issue and also the idling problem by advancing the pump timing by about 5mm on the front flange ( by moving the pump top away from the motor). have also turned the fuel screw (back of pump) in 1/2 a turn ( clockwise). Result is no smoke (black or white, all rev ranges )had a friend in a car follow me around, up long hills around suburbs for observation of smoke. had more power. But the problem now is does not want to start, specially when hot (steep hill start works) ether hot does nothing to help, ether cold gets it running Glowing it 3 times does not seem to help cold or hot. It had a hot start problem before all the adjustments. If you have read my first post you will see what we have (checked) done before all these adjustments.
 

·
Registered
nissan
Joined
·
336 Posts
Any internal components would be best left for a shop with the right gear.
Sure you could pull it down and maybe even fix it up but 1 thing with diesel pumps I know for sure is that it doesn't need to be much wrong to make a big difference. Small amount of dirt, minor adjustment etc... could render it completely useless.
I would leave it to the experts if it were me
I totally agree. I was an apprentice petrol mech 14yrs ago & I still got my pump done professionally.

Also if you timed the pump by ear or by measuring with anything other than a dial gauge then you can't be sure of what will happen as you don't know if you've exceeded limitations. I bet that's why it won't start now. Sure it will increase power but it decreases pump life. 5mm sounds too far to me. I was told 2mm is the max you want to turn it without risking damage to it. Like Paddy said, it doesn't take much to get big dramas. Winding up the pump is an old trick but it's not a cure to problems.

I'd be suspicious of the turbo personally. It could be cracked.
 

·
Registered
nissan patroll gu1999 4.2td
Joined
·
6 Posts
Discussion Starter · #11 ·
More info required

Ok. Thanks all for the input so far. it starts cold ok after 2 glows did narrow it down from 3glows. Reset the tappets to 14 thou hot, ( they were about 2 thou loose),if anything it seemed to reduce the power overall. Still wont start hot, that is the only issue we have now, not a lot of power at low revs at any time, tends to be easy to stall on take off, IE The hot start thing is a problem in traffic. Hot start partially cured by tipping cold water over the pump while stopped. It wont start hot on/with ether, tried using ether when hot it causes the cranking speed to slow right down,(possibly overuse of ether, but have tried a small amount to no effect). What are the symptoms of turbo failure ? Can anyone elaborate? Open to suggestions on other causes of my problem. If the pump is stuffed we would like to know we have given the alternatives a good shot. Took it for a run and turned in the fuel screw in another 3/4 turn, after some trial and error, with buddy/observer following, (now equals 1 1 /4 full turns) resulted in more power ,still no smoke. PS Have run a can of LIQUIMOLY Diesel purge plus according to the directions,through the Injector pump.
 

·
Registered
Joined
·
124 Posts
Sorry to dig this one up, was going through some old posts.

Cowfarmer it sounds like you have messed with way too much stuff that you shouldn't and you have made a mess of it.
Diesel fuel pumps are NOT like mucking around with a petrol distributor where you give it a bit and see how it goes. If you mess up your diesel pump timing it can kill your engine, smoke is not the measure of engine tune and I realy think you should stick to farming cows and take your patrol to someone who knows what they are doing.
Diesel pump timing is not measured in mm of rotation.
Let them know you have messed with it and ask if they even want to take it on to fix it, hand them the keys and happily pay them good money to fix your errors.
 

·
Registered
Joined
·
3,472 Posts
Sorry to dig this one up, was going through some old posts.

Cowfarmer it sounds like you have messed with way too much stuff that you shouldn't and you have made a mess of it.
Diesel fuel pumps are NOT like mucking around with a petrol distributor where you give it a bit and see how it goes. If you mess up your diesel pump timing it can kill your engine, smoke is not the measure of engine tune and I realy think you should stick to farming cows and take your patrol to someone who knows what they are doing.
Diesel pump timing is not measured in mm of rotation.
Let them know you have messed with it and ask if they even want to take it on to fix it, hand them the keys and happily pay them good money to fix your errors.
He probably got it sorted a couple of months ago. Either that or he's too embarrassed to admit what he'd done wrong:roll:
 
1 - 13 of 13 Posts
Top