Nissan QX 1999 3ltr 100k miles

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Wed 27 Jul 2005 15:31
Nissan QX 1999 3ltr 100k miles - Ben {P}
A friend is away on holiday and has left her QX on my drive to have a look at; I have noticed a number of faults:

I) Air-bag light flashes- what is the likely cause of this?

ii) Poor running- she complains the car occasionally feels sluggish. I just tried to start the car and it cut out each time unless I opened the throttle to make it rev a little. Once running the car settled into a reasonable, idle at an indicated 600rpm. There is no engine warning light illuminated. I thought I would take the car to the local dealer, but unfortunately they cannot plug it in to their diagnostic machine until after she leaves.

Will a diagnostic machine display faults if the engine light is not illuminated, and what is the most likely cause of her troubles, I would guess lambda probe? I am unsure whether to recommend she take the car to her local main dealer to be plugged in.

Thanks.
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Wed 27 Jul 2005 20:07
Nissan QX 1999 3ltr 100k miles - Dynamic Dave
I) Air-bag light flashes- what is the likely cause of this?


If like most other cars, more than likely seat belt pretensioners. Check under the seats to see if the wiring is secure. I beleive some lights need reseting by the dealer, some will reset themselves once the fault is fixed.
Will a diagnostic machine display faults if the engine light is
not illuminated,


Unlikely.
and what is the most likely cause of her troubles, I would guess lambda probe?


Or the idle air control valve maybe.
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Thu 28 Jul 2005 09:12
Nissan QX 1999 3ltr 100k miles - P 2501
I am pretty sure Aprilia will know the answers to your queries. He runs one of these i think.
and what is the most likely cause of her troubles, I would guess lambda probe?


>>Or the idle air control valve maybe.

Pretty likely to be one of these two.
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Thu 11 Aug 2005 16:03
Nissan QX 1999 3ltr 100k miles - Aprilia
Reset the air bag light and see if the fault code reappears. If it does then read the 'flash code' - most likely it will be a connector problem.

For the second item - thorooughly clean out the throttle body using carb cleaner and a toothbrush. Get it all really really clean - don't forget the throttle disc too.
'Sluggishness' may indicate it needs a service (i.e. plugs, air filter etc.) but its hard to know without driving the car. Lambda probe not necessaryily at fault (did it pass the MoT OK?).
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Wed 17 Aug 2005 21:30
Nissan QX 1999 3ltr 100k miles - Ben {P}
Thanks for the response Aprilia, i have just seen your post. I have just come off the phone after my friend called with a few more probs. I'll follow your advice as above, and look through the notes from the last MOT and let the forum know how i get on.
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