It's totally stock. It has had new oil, oil filter, & air filters changed recently. Any advice would be appreciated.

 

Van

Try disconnecting the battery for a few hours to reset the ECU. You should really do that after you change your air filters. That may help. If not there is a pipe that you disconnect in the engine bay that does the trick

 

Stuart

Thanks for the reply Stuart. I've done the battery disconnection thing already and hasn't helped. Ive seen the trick about disconnecting the pipe but forgot where....do you have a link or know where or which pipe it is????

Cheers

Van

Sorry dont know the link or which tube it is. I am sure some one will be able to tell you at a more civilised hour.

 

Stuart

here u go:

http://300zx-twinturbo.com/tech/co/co.html

 

Vijay

might be the 02 sensors if all the easy stuff doesnt come good.

02 sensor diagnostic http://www.aus300zxclub.com/tech/o2.htm

Cheers for your help guys. I'll try Vijay's first. Fingers crossed.

Laterz

Van

Pulling the pipe off doesn't fix the problem, it hides the symptoms. It's fine to get through the MOT, but you wanna be identifying the root cause ASAP.

I reckon it's probably one of your O2 sensors...and they are a bit of a pig to change (nothing new there, then!).

 

It may be worth a confirmation on the MoT though...mine 'failed' on emission a while back at a local reputable garage, so they took it my local main dealer (Dunstable) for a diagnostic. I was fearing the worst....then I get a call saying that it's fine, no problem on emissions...the 'local garage' were'nt taking the right readings FFS!!

 

You never know, it might be worth a shot......

Woohooooooo. I did the pipe trick and to the puzzled mechanic it passed. He thought that 'cleaning' the connectors wouldn't have done much good and needs a diagnostics test. Anyhow, AndyP is right that the problem needs to be solved.

It was emitting 4.01% CO and the allowable was

 

Cheerz

Van

When were the spark plugs last changed Van?

 

Could be that they are not burning the fuel as efficiently as they could be!

Hi Cos

I did them about 2 months ago. the two rear ones were a pain.

Laterz

Van