GQ no go sometimes!!!!!!!!!!!!!!!!!!
Submitted: Friday, Jan 28, 2005 at 23:43
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Knight Patrol
My Nissan 3l has developed an annoying problem. Every now and then when you press the accelerator the vehicle does not repond. The motor happily idles and if you carefully tap the accelerator pedal a few time you can get the motor to rev and away you go again. A recent trip to
Cervantes had this happen at Cataby on the bitumen but the trip
home through the sand was without a problem despite very heavy going. It can happen on the way to work and not happen in the sandhills so it is very intermittent. Nissan seem to be perplexed and I have diagnostic sessions coming out of my ears. No solutions. The accelerator module has been replaced under warranty (as the vehicle has only 28k on it) and the computer re-booted.
Anyone with any ideas???????
Reply By: Paul - Monday, Jan 31, 2005 at 02:55
Monday, Jan 31, 2005 at 02:55
Hi,
Just wondering..... I have a 2000 GU which has a very imtermittant problem (ie has not occured in over 5 weeks but prior to that I had it happen 5 times in one trip to Central Coast, and I was able to reproduce it quite regulary going up a specific
hill near
home first thing when the car was started at any time of day, but there were other times where it was fine) (I've only noticed it in 3rd and 5th gears) and when engine revs are about 2500 - 3000 I get this sudden loss of power....its like the waste
gate on the turbo opens up and the engine revs slowly decrese, taking the foot off the accelerator and pushing it down again resets it and engine revs pick up and I accelerate up the
hill or on the flat
West End Diesel have looked at it and cannot reproduce it, they said if the waste
gate opens this would casue an error code in the ECU which they found none (error codes)
I'm guessing here but you could have a faulty injector.....as the GU's are direct injection they have a two stage injector ie they require something like 160psi for the first stage and 320psi for the second (don't quote me on that). Why I do not know I only say this as West End Diesel tested my injectors and said I had one which was border line on the second stage and explained it to me in their lingo but if they are faulty it can lead to lack of power and maybe it is good somedays and sticks a little on other days but @ $500 per injector and you don't replace one you replace the lot...$2000 buck I don't have at the moment.
Paul
AnswerID:
95752
Follow Up By: awill4x4 - Monday, Jan 31, 2005 at 10:57
Monday, Jan 31, 2005 at 10:57
I'm not surprised that no error code for the wastegate shows up as the ZD30 doesn't have a wastegate it uses a variable vane exhaust housing.
I have heard of this same problem on early 3 litre diesel Patrols and I believe that in some cases Nissan were replacing ECU's to get a fix.
I think it was put down to the ECU not controlling the variable vane adequately particularly on hills and it was always the same thing, get off the throttle then get back on to get it to boost.
FollowupID:
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Follow Up By: Paul - Monday, Jan 31, 2005 at 15:33
Monday, Jan 31, 2005 at 15:33
Thanks for the info.....probably got buckles of getting Nissan to swap out the ECU when its over a year out of factory warranty though !!!
PAul
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