2003 RA Rodeo diesel help

Submitted: Wednesday, Sep 11, 2013 at 19:33
ThreadID: 104283 Views:19353 Replies:8 FollowUps:9
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I've got problems with a 2003 4WD RA Rodeo 3lt diesel in that last night it drove perfectly, but this morning it would not rev over 1500 RPM with full throttle. I've fitted new fuel filter, air flow meter,looked for filter in injection pump (couldn't find one), checked for air leaks OK, turbo is spinning, and have scanned the injection system with no codes present. Also blocked off the egr valve, but still wont rev over 1500 rpm. The fuel should not be contaminated as its been 2 weeks since last fill up. Anyone had this problem or can point me in the right direction.

Murray
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Reply By: Ross M - Wednesday, Sep 11, 2013 at 21:36

Wednesday, Sep 11, 2013 at 21:36
Murray
Although I am not very familiar with the earlier engine I think they use oil pressure to operate the injection system.
Sometimes O rings on the injectors give trouble and the oil pressure to operate them is less.

Also, I believe the engine oil level and quality is important.
if there is O rings leaking it may dilute the engine oil and be too thin to operate the injectors correctly/fully.

It would appear a uniform ie over 4 injectors type problem so look to see if oil is thinned by diesel or the level is low.
I think somewhere there is your problem.

Someone who owns one and has had the same, not uncommon, problem may know more.

Cheers
Ross M
AnswerID: 517980

Follow Up By: Ross M - Wednesday, Sep 11, 2013 at 21:45

Wednesday, Sep 11, 2013 at 21:45
Some have reported a fuel delivery problem with the fuel not being delivered to the injection system in sufficient quantity. ie won't rev on a 4JB1 engine.
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Follow Up By: Ross M - Wednesday, Sep 11, 2013 at 21:53

Wednesday, Sep 11, 2013 at 21:53
More thinking.
If it is a 4jj1 engine then likely to be the fuel pressure regulator on the back of the HP pump. Around $120 accessed through the LHS wheel arch, has a wired plug near it which is green.

This thing controls system pressure at about 6 psi.
If you can check the pressure at the fuel filter bleed off hole it may indicate lower than that pressure. Not good if lower.
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Follow Up By: Member - Murray R (VIC) - Friday, Sep 13, 2013 at 20:44

Friday, Sep 13, 2013 at 20:44
Ross
Thanks for the reply, the engine is a 4JH1-TC and now it wont fire at all. No sign of diesel in the oil. Rescanned and now comes up with high pressure fuel solenoid fault so looks like injector pump.
Murray
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Reply By: Ron N - Wednesday, Sep 11, 2013 at 21:59

Wednesday, Sep 11, 2013 at 21:59
Murray - See if this thread has any useful info in it for you - it appears to be a common 4JJ-1 Isuzu problem.

http://forum.australia4wd.com/index.php?/topic/23127-fuel-issues-with-3ltr-4jj1-common-rail-isusu-rodeo-motor/

Cheers, Ron.
AnswerID: 517981

Follow Up By: Member - Murray R (VIC) - Friday, Sep 13, 2013 at 20:46

Friday, Sep 13, 2013 at 20:46
Thanks Ron but wrong engine.
Murray
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Reply By: Mudripper - Wednesday, Sep 11, 2013 at 23:32

Wednesday, Sep 11, 2013 at 23:32
Hi Murray,

It appears that you have the 4JH1-TC (non common rail) engine (from 2001 to 2006). The 4JJ1 is the later (common rail) engine which was introduced in 2007. The 4JB1 engine precedes your model (it was the 2.8Lt). I have the same engine as you do in my 2004 RA 3.0iTD. I had a look in my workshop manual and it says this:

Troubleshooting (engine):

Insufficient power/acceleration: (the closest category I could find to your problem)

1. Air filter condition? (You've already checked that).
2. Any air intake leakages? (You've checked that).
3. Fuel filter element condition? (You've checked that.)
4. Check injection pipes
5. Any water contamination? (You've checked that.)
6. Injection spray pattern?
7. Compression pressure?
8. Any exhaust blockages/leaks?
9. Waste gate control actuator hose condition?
10. Waste gate operation OK?
11. Is turbocharger working (You've checked that.)

How does the engine behave? Does it smoke, is it hard to start, does it idle smoothly? I've never experienced this kind of problem before with my one. I'm thinking it's ECM related, though don't quote me on that.

I shall do more research.

Hope this helps.

Cheers, Tim.
AnswerID: 517982

Follow Up By: Member - Murray R (VIC) - Friday, Sep 13, 2013 at 20:50

Friday, Sep 13, 2013 at 20:50
Tim
Iv'e checked all the above bar comp & injectors,got code now pointing to pump. Thanks for your input.

Murray
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Reply By: member - mazcan - Thursday, Sep 12, 2013 at 11:32

Thursday, Sep 12, 2013 at 11:32
hi
it could be a blocked air intake
or a baffle has broken away inside the muffler blocking the exhaust gases
ive had that problem with an older vehicle once and it was the last thing
I looked at took the tail pipe off and rammed a crowbar up the muffle a few times and bingo no more restrictions and full revs again
your 2003 model if its still on original muffler check it out as above may be the case
cheers
AnswerID: 517991

Follow Up By: Albany Nomads - Thursday, Sep 12, 2013 at 16:28

Thursday, Sep 12, 2013 at 16:28
Good point my old man had the same problem with his GQ patrol and the problem was a collapsed muffler
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Follow Up By: Member - Murray R (VIC) - Friday, Sep 13, 2013 at 20:52

Friday, Sep 13, 2013 at 20:52
Mazcan
yep checked for blocked exhaust OK.

Thanks Murray
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Reply By: Stu & "Bob" - Thursday, Sep 12, 2013 at 13:41

Thursday, Sep 12, 2013 at 13:41
Have you removed the fuel tank cap and checked to see if there is a vacuum?
ie. blocked fuel tank breather?

.
AnswerID: 517996

Follow Up By: Member - Murray R (VIC) - Friday, Sep 13, 2013 at 20:54

Friday, Sep 13, 2013 at 20:54
Stu
Tryed that first.

Thanks Murray
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Reply By: Mogul - Thursday, Sep 12, 2013 at 20:25

Thursday, Sep 12, 2013 at 20:25
Try replacing the throttle position switch. Had a similar problem a couple of years ago, send engine into limp mode.
AnswerID: 518023

Follow Up By: Cruisevessel - Friday, Sep 13, 2013 at 19:58

Friday, Sep 13, 2013 at 19:58
Cycle the ignition next time it happens and will be all good. Used to work on this one particular RA and it would happen about once every three months and we were never able to find the issue.
It will leave a history code in the ecu, but when testing for the code the components always tested fine.
I put it down to electricial interference within the engine harness to ecu.
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FollowupID: 797824

Reply By: Member - Murray R (VIC) - Friday, Sep 13, 2013 at 20:58

Friday, Sep 13, 2013 at 20:58
As said the motor has now stopped and has logged a code for the high pressure fuel solenoid so its pointing to the injector pump. Will let you know how I finnish up. Thanks for your replys.

Murray
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AnswerID: 518091

Reply By: Member - Murray R (VIC) - Wednesday, Oct 02, 2013 at 21:45

Wednesday, Oct 02, 2013 at 21:45
The Rodeo is now going again after we fitted a new injection pump. The problem with it was the high pressure fuel solenoid within the pump.
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AnswerID: 519084

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