when i accelerate hard in my car, i get a big plume of black smoke, it only does it if i have been driving round the town then give it some on an open road, also getting a lot of black soot on the rear of my car

 

doesnt seem to be any opil in the soot, its just black

 

also getting a strong sooty smell in my car, cant have windows down otherwise i fell like im choking lol

 

any ideas, gonna be plugging a consult in this week to see if it shows anything up

That would be unburnt fuel... hmmm nice.

 

over fueling?

I think your cars been calling out for a check up recently. get it on the consult.

but what is causing it, i think i would have more fun just spraying the fuel pump all over the forecourt rather than putting it in the car and spraying it all over the road, would probably last longer aswell lol

Erm loads of stuff could cause it.

When did ya last change ya spark plugs?

fuel regulator.

I wouldnt drive it like that stella or you could be looking at a new engine soon. Overfueling and borewashing your cylinders.

 

whats it feel like to drive?

tell me more about this fuel regulator, ive came across this before, any pics of it

Lambda sensors would not cause that, the fpr can cause it or an incorrect map.

i do have a chip in, will put my standard ecu back in and see what happens, where about is the FPR, is it an easy fix and what is the price like

 

cheers guys

my mistake sorry.

But i would make it over fuel though for saftey?

fpr. fuel pressure regulator? thats what i just said.

yeah i guessed that jimy, but where is it

You can order an fpr from the states, but it is better to check if it is in spec first, details are in my sig!

It is on the engine diagram pic that was lurking around here a while ago!

yeah i guessed that jimy, but where is it

 

Theres a pic of one here:

http://www.300zx.co.uk/forums/showthread.php?t=102298&highlight=fpr

i do have a chip in, will put my standard ecu back in and see what happens,

 

dont forget to wind your boost back down big fella ;)

if the ecu has been in there for a while and its only just started doing it then i doubt its the ecu. most prob regulator.

Id bet on lazy 02 sensor, mine has one lazy 02 sensor and gets a bit sooty on boost from time to time most of the time its fine.

 

Might be an idea to get someone to drive behind you see if the soot is from 1 exhaust or both.

cheers for that guys, would a consult check tell me if the FPR is fooked, i think its coming from both sides

No a conzult won't do that, the O2 sensors are only used in closed loop and when you stick your foot down they go onto the open loop maps.