Yes this again.

 

I have more to add to it. Here are the symptoms.

 

White smoke when I am in traffic.

The exhaust tips get covered in soot in about 50 miles of driving after cleaning them.

I am not losing water.

I am not losing coolent.

I am not losing oil.

 

All are checked and are the same level they have been for a while.

 

My car stinks of petrol when driving.

Took it for a drive today with the roof off, and I nearly died from the smell of the fumes. It was really THAT bad. However when I drove in first about 4000-4500 rpm for a while the smell went but soon as I went back to just crusing around 1500-2000 rpm the smell came back.

 

This suggests I am running very very rich.

 

Any one have any more ideas? I am thinking of replacing the O2 sensors and replacing the fuel pressure regulator.

 

 

 

Stuart

Sounds like that fuel pressure thingy that tony c mentioned in the lasy post, all the other things (steamy exhaust in the morning etc) seen quite well almost normal for a zed. I take it youve tightened all the fuel line screwey uppy things under the bonnet? ( thats my specal technical term for em!!)

The Regulator has a pipe running off it that you can not see,its underneath it ,runs at a slight angle,run car for a few minutes,(or leave it running,watch you fingers,plenum gets hot) then get your fingers underthere and try to feel for wetness,damp etc,worth checking:confused:

Do an ecu O2 diagnostic check! Could also be the FPR/damper.

In fact, reading again what you wrote, its ok at about 4-5k rpm? But bad between 1-2k rpm? 90% sure thats O2s as the ecu only uses them below around 3.5k rpm - after that it is NOT a closed loop system...

The small hose TonyC refers to above was leaking fuel on mine when cold and when you eventually find it you think that the fpr has gone when its only a hard shrunk hose pipe. You need to take the plastic cover off over the throttle cables to see it. Also you will find tea cupfuls of petrol being dumped out this and it all runs under the plenum down the back of the engine and down the bell housing onto the floor right under the car. Thats also why its so strong in the car. Once warmed right up the hose starts to seal again and heat vapouries any fuel. This is classic zed and loads of posts on this.

 

This is where the smell most likely comes from. A slight trace doesnt smell that bad and if it was rich running enough to smell it from the exhaust you would also get flames and popping out the exhaust when hot on overrun. Maybe also black smoke.

 

My bets on a leak.

 

Exhausts always get sooty even running right

 

Buy a length of new 8mm high pressure fuel hose and spend an hour or so changing everyone on the engine. You will be amazed at how hardened some of these are.

I dont think it is a leak.

I have had that leak before and I have replaced all the fuel lines in the bay, or the ones I could reach, and I have put new clips on too. The smell a few months ago was acutally coming from the fuel filter but that has gone now.

 

 

The smell is not of clean fuel like you get in a petrol station. Its deffinatly coming from the back, as a few times when it really smells bad, my exhaust flames, which you dont expect with stock injectors and stock ECU.

 

Stuart

It's got to be a fuel leak, there's no way it could run rich enough for you to smell it.

If it was that, where would the smell come from? - the exhausts so you wouldn't smell it in the car.

It has to be blowing off the engine into the cabin.

 

Check the hoses for leaks by going out early and putting talc around the fuel hose joins. Then when you start it up you can see where the fuel has leaked.

 

The leaks on mine were under the regulator (tightening didn't fix, I had to take it off and replace the hose) and the worst one was under the throttle pulleys at the front of the engine joining the fuel rails. There are a couple of other pipes under there too.

To fix the one at the front I had to take the throttle bodies off which was a pain in the arse. If it's the others it would probably need the plenum to come off :(

Chris, I think the sooty exhausts would say exactly where the fuel smell was coming from ;)

 

You CAN smell exhaust in the car - esp if you have the window open lol

 

Do an ECU O2 diagnostic check......

I may not have said but, with the windows up and roof on, you can hardly smell it. Only a couple of time. But when I had the roof off, it was feeling ill from the fumes.

 

Stuart

Or you might have rot in the fuel tank. Is it worse when full?

my zed also smells of fuel but only when it's cold(outside temp not car)and also when stop starting in traffic.

 

But that said i also have a lot of probs with those damn fuel lines. the clamps just dont seem to be able to seal well enough never had trouble with hoses like i have with this car

 

and as for the white smoke last time i saw white smoke from my zed i had one turbo that was shot and an engine with cylinder readings from 170 to 68psi and it was as steady as at idle..

Originally posted by WillieO

Or you might have rot in the fuel tank. Is it worse when full?

 

 

I never have enough money to fill it ;)

 

 

Dont know but I have a better tank to put on it soon. Just not had the time.

 

Stuart