Navara 3.0l turbo diesel - engine stalling problem
Submitted: Thursday, Feb 01, 2007 at 17:30
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zabble
Please help. I have an '02 Navara ST-R (3.0l turbo diesel) which has done 76000kms. About 6 weeks ago the engine light came on while i was doing about 90kmh and the engine completely stalled and all power shut off, after waiting a few seconds i was able to turn the key and the car started no problem. Since then, the car is now randomly stalling but only while coasting downhill with my foot off the accelarator and the engine light doesn't come on. I am able to restart the car while rolling down
hill. The Nissan dealer ran it on the diagnostic computer but no faults appeared...they then knocked me off my chair by suggesting (or guessing) it was a problem with the fuel injector pump and it would cost me about $5000 to have replaced. As i am not prepared to
fork out the $$ if they are only guessing at what the problem is i decided to take it to an auto electrician. He put the diagnostic machine on the car and it reported a "throttle sensor" issue - he deleted the fault entry. I drove the car today and the fault is still there, the car stalls while going down
hill with my foot off the accelerator - i went back to the auto electrician this arvo to see if the throttle sensor fault appeared but the fault did not appear on the machine. So, now i have no idea what to do - i can't believe Nissan don't know what the problem is or are unwilling to properly diagnose the fault. Does anyone out there have any idea or suggestions for what i can do. Has anyone ever heard of anything like this? Would be grateful for any suggestions at this stage.
Reply By: Hopper51 - Thursday, Feb 01, 2007 at 18:46
Thursday, Feb 01, 2007 at 18:46
Hi there Zabble
Sounds like the motor is stuffed - throw it away and get a new one.
More seriously, I had a Mazda RX8 that started cutting out when it only had 250kms on the clock. The Mazda mechanic said I wasn't revving it hard enough. Tried that but it progressively got worse. I wasn't happy considering it was a brand new car. The dealer eventually agreed there was a problem even though it did not show up on the diagnostic computer. They pulled the fuel tank out and found a fair quantity of rust like crud (the fuel tank is plastic) inside which was blocking the pump and filter after it had been running a short time. They ended up flushing out the tank and the fuel lines and replacing the pump and filter - all this before I had used 1 tank of fuel. As near as we could work out, some
bright spark on the
Melbourne wharves added a bit of fuel from a dubious source because he thought it had run out when it flooded and wouldn't start while unloading from the ship. The RX8 was prone to this when brand new. It was a magnificent car to drive but after 2.5 years and another fault that the dealers couldn't and didn't seem interested in fixing I traded it in on a new TD6 landcruiser. No more problems.
regards
Hopper_51
AnswerID:
219049
Reply By: zabble - Thursday, Feb 01, 2007 at 19:57
Thursday, Feb 01, 2007 at 19:57
what an awesome
forum - thanks so much for all the tips so far...
Firstly, i have never used any biodiesel but about 15000 kms ago i had a bad batch of fuel (from an independant - never again!) which resulted in a lot of coughing & spluttering and the fuel filter needing to be replaced. But the new problem has only started about 2000kms ago so not sure that there is any connection there.
Interesting that the engine only stall when i go down
hill with my foot off the accelerator, coasting. wierd. maybe this suggests a TPS issue ?
Also interesting, that the TPS was the fault logged on the diagnostic but once removed hasn't come back.
I'm thinking of perhaps replacing the TPS as a starting point and if that doesn't work, perhaps clean the tank & lines (not that i know how to do either of these things but it's a good time to start learning i guess).
This will definately be a process of elimination so if anyone has anymore tips i'm happy to hear them. thanks again everyone
AnswerID:
219063
Follow Up By: zabble - Thursday, Feb 01, 2007 at 19:59
Thursday, Feb 01, 2007 at 19:59
sorry, forgot to mention that the problem occurs at whatever the level of fuel in the tank, max or low.
FollowupID:
479527
Reply By: Member - Bucky (VIC) - Saturday, Feb 03, 2007 at 04:54
Saturday, Feb 03, 2007 at 04:54
I have an 03 Navara, and never had a fuel problem ( touchwood ) ,,,
Have you had a look at the in-line filter at the fuel tank ?
Its in a very awkward spot, but it is accessable, I would change that , and the main one as
well ,,,,
Try putting a double dose of Chemtech Diesel additive, into the fuel tank, and tow something really heavy, for 50 or 100 km..at highway speed ( safely )
A really good workout, is sometimes the best thing. A real good blow out
Cheers Mate
Bucky
AnswerID:
219397