Well, after suffereing with a fuel surge problem, I finially got to fixing that but fitting a new fuel filter, and new fuel pump. After fitting these two parts, the car ran perfectly, better than it has in a long time.

The next day I went to start the car, and was greated buy a smell of petrol, and white smoke coming out of the exhaust. Took the car for a quick run up and down my street, and could tell that it was missing. I latter on worked out what cylinder was not running buy touching the extractors, and locating the cold pipe.

Now, ive checked the spark plugs, they seem to be fine, and leads wouldnt explain the white smoke, and petrol coming out the tail pipe.

Last night I pulled off the upper manifold to have a look, and saw that the walls on the walls of the lower manifold for the front three cylinders looked a normal, brownish colour you see in an engine. However, in cylinder 3, and 5, the walls were half brown (like normal), and the other half was just manifold, like the manifold had been cleaned.

Today, I started the engine, and let it run for a few mintues. I then measured the temperate of the front extractors, and they were all 100 Degress plus. I measuerd the back three, and one of them was 30degress, and the otheres were well under 45 degress.

So, now im thinking its the whole back half of the engine thats not running correctly. I also know what white smoke means the engine could be burning coolant.

Does anyone else thing that I have a cracked, or in some way damaged head gasket on the rear bank ?

Car is at mechanics, and we are a little confused about where to go from here.

Gasket is fine. The problem is that two of the injectors are staying open, and spraying fuel constantly into the cylinder. This fuel is coming straight out of the exhaust pipe.

Mechani checked out a few things today, including the pumpand FPR. He spoke to an injection specialist, who said it was extremely unlikely that the issue is being caused by a faulty injector.

Our next idea could be to do with the ECU sending out faulty readings.

Any ideas guys ?

Really need help here.

unfortunately, neat fuel destroys catalytic converters, make sure that gets looked at too. Maybe the O2 sensor in the exhaust is sending bad readings and causing the overfuelling. Doesnt explain why only the rear cylinders tho?

Perhaps when the pump and filter was replaced some dirt got in the line and has stuck those injectors open?

when the car is off does it hold the pressure, or release the fuel into those cylinders. If they are closing when off then it would be bad signals from the ecu, if they leak fuel into the cylinders i would say they are being stuck open physically

Perhaps when the pump and filter was replaced some dirt got in the line and has stuck those injectors open?

when the car is off does it hold the pressure, or release the fuel into those cylinders. If they are closing when off then it would be bad signals from the ecu, if they leak fuel into the cylinders i would say they are being stuck open physically

Very, very good point. I must get that checked out in the morning. IT would greatly help narrow it down if we knew just when, and how the injectors were open.

I mentioned o2 sensor to my mechanic, and he goes it would make sense if it was all the injectors, but seems to odd that it was only 2 cylinders.

from the state of the filters i wouldnt be suprised if some rubbish went through the lines

from the state of the filters i wouldnt be suprised if some rubbish went through the lines

I agree.

But, the injectors are closing when the motor is off, so therefore, the issue lies not with the injectors, but with what the injector is being told.

I agree.

But, the injectors are closing when the motor is off, so therefore, the issue lies not with the injectors, but with what the injector is being told.

Are you sure of this? Fuel pressure will drop when the engine is off and no more fuel will come out if they are still stuck on.

To check if it is a dodgy signal, hook up some noid lights to the injector terminals. If they are flashing (as opposed to constantly on) then its the injectors. QED. If it isn't then its the ECU OR you have a wire that is compressed somewhere (these are -ve switched IIRC - if you have leads grounded, then they will be constantly on. Has the intake manifold been off lately, and have you checked the grounds for your injectors - and that a wire hasn't been crushed between the manifold surfaces?