Anyone know about carbs/catalyst's "gasing up?"

[golders]

Hello,

I have just posted a message on the Nissan Forum Freshalloy.com about my Nissan 100nx's stuttering problem, and one chap mentioned that it could be caused by the car "Gasing up". Does anyone one anything about this problem as its new to me. Also is there an internet site that lists Nissan Service Bullentins?

Thanks for your help,

Golders

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The message I posted and the chaps answer are below:

<b>Question:</b>

Hello,

My Nissan NX 1600 Auto (known as 100nx in the UK) is suffering from a strange hesitation problem. The car seems to be holding back, and almost stutters at some points. This can occur at 20, 30, 40 or 60mph the revs will fluctuate and then it is ok. It seems to get worse if you give it more power and better if you back off the accelerator.

The car is currently doing 24.5 mpg (it should do 30-35mpg).
I have replaced the Air Filter, Fuel Filter, Oil & filter, Spark Plugs, and sprayed Carb cleaner down the Carb. I have used Fuel additives etc, but it does not seem to help.
The local garage looked at it today and could not work out what the problem is.
If anyone has any ideas or has experienced anything like this please could you help.
Any info would be appreciated.
Many thanks,
Golders (Kent, UK)


<b>Answer:</b>

I had the same problems with a 1.4 engined Sunny a number of years ago. Nissan dealers have a service bulletin on this problem which affects carburettor GA engined cars with catalysts. In essence the carb cannot measure the fuel accurately enough for the emissions control equipment, causing the car to 'Gas Up' - this causes the hesitation/misfire you are talking about. If you remove your sparkies you will probably find they are all furred up to to over rich mixture. The remedy is either a right good tune up at the hands of a true expert, remove the cat or get one of the later fuel injected engines.

If it's the same problem I had, it is an utter pig to rectify and in my case made the car practically undriveable when it started acting up. Let me know how you get on. It is not an uncommon problem.

Scott

[Vez]

Could be a fcuked cat! That would cause that sort of problem too and is more likely than the mystical "gassing up"

[Nathan_200sx]

I think "gasing up" is american for over fueling since he mentions "furry sparkies" and running rich.

[golders]

Fun. The car went weird on the way into work this morning!

I was driving down the A21 dual carriageway doing 60-70mph and then it slowly loses all power, I was doing 40mph in third with foot flatdown on the accelerator and it was getting slower and slower. I managed to pull up in a layby left the car for 5 mins and it was fine after that. (this happened 2 weeks ago also).

I am mistified (so is my local garage chap).

[Nathan_200sx]

Originally posted by golders
Fun. The car went weird on the way into work this morning!

I was driving down the A21 dual carriageway doing 60-70mph and then it slowly loses all power, I was doing 40mph in third with foot flatdown on the accelerator and it was getting slower and slower. I managed to pull up in a layby left the car for 5 mins and it was fine after that. (this happened 2 weeks ago also).

I am mistified (so is my local garage chap).


No Alien Motherships in the area? I hear this happens alot when ET is nicking cows to cut up

[Vez]

It sounds like a colapsed cat, which is increasing back pressure hoendously therefore limiting revs and power, though your tourque will go through the roof ;)

[golders]

Vez,
I think your right, it must be a kippered CAT. But if the CAT was Fcuked would it not be bad all the time? This seems to be bad randomly. Car is going in tomorrow to be checked.


Nathan,
I think ALF the Alien was in the Area. Remember that sh1te American prog?

[Vez]

It depends how the catalyst has colapsed, it may well have mad itself into a sort of valve with moving parts!!!

Get your self a spastic hammer or mallet and give the cat a few wacks, and see if the catalyst rattles and stuff, or take it off and shake it, and peer through it and see if it look fecked (i.e. it no longer looks like a honeycomb affair!