GU Patrol going into limp mode!
Submitted: Monday, Mar 24, 2008 at 15:56
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55868
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brendo
Hey guys my old man has a 2002, 3 litre patrol. This problem only happens when he is towing the van. All of a sudden goes into limp mode. But no engine warning lamp comes on. We have tested for error codes but nothing is registered.
Has anyone else had this problem?
Reply By: Dave Thomson - Monday, Mar 24, 2008 at 16:06
Monday, Mar 24, 2008 at 16:06
Motherhen ???
AnswerID:
294420
Reply By: nickb - Monday, Mar 24, 2008 at 16:33
Monday, Mar 24, 2008 at 16:33
Sounds like its over boosting. Check this site for ALL the info you need on 3L patrols, someone here will be able to help you out:
www.patrol4x4.com
AnswerID:
294429
Reply By: blue one - Monday, Mar 24, 2008 at 16:48
Monday, Mar 24, 2008 at 16:48
Mass air flow sensor
AnswerID:
294432
Reply By: Member - David P (VIC) - Monday, Mar 24, 2008 at 16:54
Monday, Mar 24, 2008 at 16:54
Sounds like a temp related prob with a sensor going into "protect" mode....what was the air temp? ...towing air speed of the rig?.....silverback
AnswerID:
294435
Reply By: Notso - Monday, Mar 24, 2008 at 17:33
Monday, Mar 24, 2008 at 17:33
You might also try removing and cleaning all the Earth Points on the vehicle. In particular the three on the Valve gear Cover near the front of the engine. MAKE~SURE THE BATTERY IS DISCONNECTED BEFORE UNDOING THESE THREE. Major sparking can result otherwise.
AnswerID:
294444
Reply By: yakodi - Monday, Mar 24, 2008 at 17:49
Monday, Mar 24, 2008 at 17:49
Our patrol 3L 2002 model would be fine to drive around town and highway - but put a 2 tonne van behind it and it really struggled. Would struggle to pull 80kmh and 2nd gear up slight inclines. Was running a little on the warm side, no warning lights. Turned out to be a semi-blocked radiator - after it wasn't backflushed by nissan after a rebuild. Hope your old mans GU problem is something as basic as this.
AnswerID:
294451
Reply By: Member - Matthew ,United Fuel- Monday, Mar 24, 2008 at 17:50
Monday, Mar 24, 2008 at 17:50
Very normal sympton for a few causes,does the engine return to normal power once you lift the pedal and re-pressit ??????
Matt
AnswerID:
294452
Follow Up By: brendo - Tuesday, Mar 25, 2008 at 20:56
Tuesday, Mar 25, 2008 at 20:56
hey Matt, That,s exacty whats happening.
FollowupID:
560619
Follow Up By: Member - Matthew ,United Fuel- Tuesday, Mar 25, 2008 at 21:44
Tuesday, Mar 25, 2008 at 21:44
Ok no worries,the problem is the turbo.
We have seen this three times now,the VNT (variable nozzle turbocharger) is vacuum controlled and what is happening is the vanes inside that direct the exhaust gas over the turbine wheel become sticky and the vacuum solenoid cannot control the movement so it dumps the vacuum to the VNT canister,hence no boost.Luift the foot everything resets itself and the process starts again.
Are you finding it is happening at the same engine RPM/Road speeds.
Matt
FollowupID:
560631
Follow Up By: brendo - Tuesday, Mar 25, 2008 at 23:01
Tuesday, Mar 25, 2008 at 23:01
yes mate generally about 3000 rpm, most times when he drops it back to fourth & third for hills.
FollowupID:
560661
Follow Up By: Member - Matthew ,United Fuel- Tuesday, Mar 25, 2008 at 23:27
Tuesday, Mar 25, 2008 at 23:27
Its not a cheap fix but a necessary one,pay to get it dynoed with a boost gauge on it just to check it out.
Matt
FollowupID:
560666
Follow Up By: brendo - Wednesday, Mar 26, 2008 at 22:11
Wednesday, Mar 26, 2008 at 22:11
Thanks Matt, I'll get the old man on to it.
FollowupID:
560825
Reply By: On Patrol (East Coast) - Monday, Mar 24, 2008 at 19:38
Monday, Mar 24, 2008 at 19:38
brendo
I had that happen once to me and it turned out to be a simple case of sucking air into the fuel line at the hose clamps.
I relaced clamps between filter and pump Hey presto no more problem. The factory clamps are crap I used quality worm drive clamps,I have since replaced all clamps in the system and still have not had the problem again even under heavy (2.3t) towing.
Colin.
AnswerID:
294477
Follow Up By: On Patrol (East Coast) - Monday, Mar 24, 2008 at 19:40
Monday, Mar 24, 2008 at 19:40
I didnt "relace" the clamps, I replaced them.
FollowupID:
560359