Outer Limits 4x4 Board

My Patrol has suddenly started to blow a huge amount of smoke when accelerating, and has lost all its power.
I've replaced the air and fuel filters, but the problem remains.
I blew air through the line from the filter to the tank and the problem went away for a couple of minutes and is now back again.
Is there a filter in the tank I should check, or any other ideas?

Cheers,
Dave

im not too sure, but on some cars, there is a small metal strainer on the pickup, you never know your luck

mate could be your injectors

probably get them looked at or cleaned not to bad to get done. i think most places charge around $20-$30 per injector plus more if nozzle need to be replaced.

morkz wrote:mate could be your injectors

probably get them looked at or cleaned not to bad to get done. i think most places charge around $20-$30 per injector plus more if nozzle need to be replaced.

if thats the case, why did it get better for a little while after blowing out the lines? just my ideas

on some models there is a filter in the injection pump,it sits under the banjo fitting for the fuel intake , this can be removed with a bent piece of wire, remove spring first., check and clean this first.

Ozi..
The issue is he blew from the fuel filter back to the tank. That wouldnt go near the fuel pump gauze filter. But cause it did go good after that, I suspect mass gunge around the fuel pickup in the tank, which would answer why it went good for a while, until the shit surrounded the pickup again.. :(

What yr model is yours? Not all have the mesh filter on the fuel pump, but it is a place to start..

but since its blowing that much smoke, I would hazard a guess that there is more than 1 thing causing it..

1) Remove tank, and see what is in there! Diesel has a habit of fungus type shit growing in there. , I would flush it out really well.. If theres gunge and shiot growing in there, you should do it all then it wont be an issue again..

2) Check the gauze filter, and probably leave it out. remove the line from the fuel pump to the fuel filter and blow that out too, infact while everythign is 'seperated' blow ALL lines out....

3) Once u have done that, I would run some Nulon Injector cleaner thru it for few tanks as well..

enjoy.

It turns out that my blowing air through the pickup line and the improvement was a coincidence.
The engine runs fine when first started, but when the engine warms up, the problems start.
Have new air/fuel filters, mechanic has removed the EGR valves, and checked the banjo bolt filter.
Thought that if it was fuel/injectors or filters, the problem would be there even when the engine was cold.
I am about to remove the banjo bolt again to get the filter out, but I can only recall there being a filter inside the bolt itself (which doesnt look like you can get out), but none under the bolt, in the injector pump.
The truck is a 1992.
Any more ideas?


thanks in advance,
Dave

Sounds like a problem in the fuel pump. Blockages in the fuel line generally wont make a deisel blow more smoke.

What condition is the fuel filter in? If ther is fungus you should be able to see it in the glass water trap (if it is still fitted).

What colour is the smoke?

How does it start in the mornings? Does it run rough at idle when cold/hot?

Usually smoke comes from lack of combustion of the fuel mixture wheather that be the incorrect air/fuel ratio entering the cylinder or the engines lack of ability to ignite the fuel through low compression.

How many kilometers on it? If they are high the first thing I would be doing is a compression test as when rings break they can cause sudden loss of power and excess smoke.

If the compression is ok then check the pump & timing. Can be an involved process & best done by a deisel mechanic.

Thanks for all the help guys.
After spending $300 on new filters and mechanics, I decided to disconnect the trottle position sensor, and the problems gone.
Is there any damage that can be caused by running this for a few days disconnected while I wait for a replacement?

Cheers,
Dave

Ahh all is becoming clear, I thought you had a deisel sorry.

Most throttle position sensors are adjustable & it may be out of its normal operationg range.

Have you tested it? It may not be faulty & when you disconnect it the computer goes into limp home mode masking the problem.

Take it to someone who knows injection & have the pull the fault codes & that should do the trick.

Is it a td42 or a tb42?

Its a diesel (TD42).
I guess its the TPS I've disconnected as it sits straight above the throttle on the injector pump.
As its under warranty, I will be getting a new one anyway, but I'm hoping I cant damage anything by driving it like this.


Dave

Its Under WARRANTY... and you paid a mechanic???

Is it a NEW 4.2 diesel Patrol??

Bazzle

Its a 92 Jap import, with a 3 year mechanical warranty, covers pretty much anything apart from clutch,brake pads etc.
Took it to my normal mechanic to do the original check as the authorised repairer was booked solid for a couple of weeks. Any further work/repairs is covered as long as it goes to an authorised agent.
These warranties are great, just had the injector pump rebuilt for free a few weeks ago

Dave