Hi everyone, just wondering if anyone can spread some light with a problem. Im overfueling on one cylinder. The plug is soaked and its throwing black smoke and running like phoo!! :headvswal . The plugs are out so im changing them for better ones (which ones though).Its boosted and got a chip in. Im gonna do the usual and check for spark but what else could it be. O2 sensor?? PTU.

Ive read many threads now but im stuck out here in Germany without help :rant: . Cus im over here i just cant start pulling stuff off bcus there aint much help.

Cheers Jonce

Which plugs are better? Nissan ones!!!! They are the only ones with the correct reach etc...

 

Sounds like either that plug is dead or possibly the injector is stuck open/leaking...

Sounds a bit like a problem I had on an old Cav - turned out to be a knackered valve

Sounds a bit like a problem I had on an old Cav - turned out to be a knackered valve

 

Good point! Could well be a chipped/burnt valve. Compression test would answer that one. Does it get better once warmed up?

also worth doing a resistance check across the injector connections, although it wont tell you if there is a mechanical defect with the injector nozzle, it well tell you if the solenoid is defective.

Cheers, it happened a few months back before i went away to Afgan. I booted it causing the dipstick to fly out and then burn fuel like mad. Its not possible to drive. I have already changed the PCV valves and have tryed to run the oil out of the manifolds etc but i had the serious running prob. So i checked the plugs and one was soaked really bad. Was gonna carry out compression test because of the dip stick and suspect valve. Just its like the car out of James Bond LOL

Good point! Could well be a chipped/burnt valve. Compression test would answer that one. Does it get better once warmed up?

 

Andy, no it doesnt it just blows smoke everywere and i mean everywhere. Its bad!!! :headvswal :rant:

Hole in a piston unfortunately bud if its blowing the dipstick out :( 100% without doubt :( Sorry....

Noooooooooooooooooooooo!!!!

Ouch.

 

Feel for you if it is a holed piston mate.

Well its deffo piston damage and one will need replacing - either hole in the piston or cracked ring lands. Does it look like this?

 

http://www.z32.pwp.blueyonder.co.uk/andyatpod.mp2

 

That was with 3 cracked pistons :D

Nasty wee video there Andy. Other than the cracked pistons, was there alot of other damage ? Valves, heads, turbos, etc ?

Just the pistons surprisingly, although afterwards the exhaust needed a damn good flush out to remove half the north sea's oil reserves :D As long is the compression is low on that cylinder it should be ok - oil vapours drastically increase the chances of detonation in the combustion chambers, so if there's oil and compression you do run the risk of even more damage....

This is the problem I'm having with my car atm. It's the sixth cylinder that plays up, but only after a little run.

Changed spark plug and she ran on all six but just as I boost a bit she farts and 6th cyl stops again.

The car has elec boost controller and it's chipped but not decat. I can smeel a lot of fuel underneath the car. Nothing is leaking :confused: I'm so tired.....help.

 

p.s. when I took the spark plug out and looked down I think I saw unburned fuel /?

matey sounds the same as mine bud , sorry

Yesterday I changed the spark plug again and took her for a 30 min drive without boosting and she's running fine on all six.

I think it all needs to be set up on rolling road.