Diesel Mechanic needed

[mewayne]

Hi, I am having problems with my diesel fortuner and Toyota can't figure it out. Anyone know of a good Diesel mechanic that might be able to help? My 07/08 Fortuner has developed a slight rough idle and has on occasion stalled. Has new air filter and I cleaned the Maf sensor. Toyota has had 3 goes at trying to fix it and last time they said they reset the fuel pump to factory specs and replaced a seal. This has stopped it stalling but still has rough idle. Any suggestions greatly appreciated. Car is 3.0 AT 4WD 76k on clock and has been regularly serviced by Toyota.

My thoughts were intermittent electrical fault rather than mechanical because of service history but I am no mechanic. Sorry for the long spiel but problem is really bugging me

[kendo]

I would suggest that theirs an air leak on an injector or rail. getting even a small amount of air into a sealed system will cause a diesel to stall or run uneven. Or it could be the seals on the fuel pump now to rebuild fuel pump will be big bucks.
Just a couple of suggestions.

[mewayne]

Thanks for your reply, something else for me to consider

[kendo]

Have listen sometimes with injectors you will get a slight ticking sound if its breathing air a little bit.

[Nereus]

I would suggest that theirs an air leak on an injector or rail. getting even a small amount of air into a sealed system will cause a diesel to stall or run uneven. Or it could be the seals on the fuel pump now to rebuild fuel pump will be big bucks.
Just a couple of suggestions.

The last diesels I worked on had a walk-in crankcase! However, I also worked on many smaller engines as well.
It is highly unlikely to be air in the injection system, and even if there was it is a simple matter to bleed it out. Air cannot enter the system without some part of it being opened up for what ever reason. No idea what type of system in that year model Toyota, but if it has electronic injection, then it must have a diagnostic plug for a laptop, or "test book" as they are referred to, which "should" show a record of any faults. And if it does then only Toyota will have the software. If it is a common rail injection system, then it is not the pump at fault, but more likely a dozzy injector. I suppose that they have replaced the filters?

[Nereus]

A quick Internet search produced the following:

http://www.car4play.com/forum/post/index.htm?t=4143

As mentioned, I am not sure which system you have. But it would not be the first time here that the dealer is just fobbing you off on what may be a warranty item.

[kendo]

Agreed if its a later model the should just be able to plug in a diagnostic machine and generate a fault code.
I am no mechanic but have had my fair share of diesel vans and trucks. I have replaced two fuel pumps on a Mitsubishi and one on my Iveco Daily.

What I was getting at is maybe a loose injector or fuel pipe union that is just not quite tight enough to make it a sealed system.

[Nereus]

Agreed if its a later model the should just be able to plug in a diagnostic machine and generate a fault code.
I am no mechanic but have had my fair share of diesel vans and trucks. I have replaced two fuel pumps on a Mitsubishi and one on my Ivecol.
What I was getting at is maybe a loose injector or fuel pipe union that is just not quite tight enough to make it a sealed system.

Kendo, the fuel systen runs at a pressure of at least 1,000 Bar (around 15,000 psi), if it has any leak like you are suggesting, then it would be painfully obvious. A loose injector would also be obvious, both from the blow-by noise of combustion gas, and obvious contamination of the oil if the injector is inside the valve cover, and around the mounting if external.

If it is a D4D Toyota, then it has a known problem with injectors. Around 2008 Toyota started using a different injector because of the problem.

OP: go and talk to K. Pichai at "L" Garage opposite the Palace, just befor the traffic lights heading north. He speaks good English and has more than likely run up against the problem before.