blowing smoke

[boogernissan]

when i give my trusty old gn wagon some stick,she blows a bit of smoke out the back,i think its only fuel smoke as its only when i got it held flat,

whats a good basis for the mixture needle on the old 2.6 astrons?
she idles a touch rough and blows black smoke at idle,the choke plate has been removed aswell,not by me either,

im gonna do a comp test aswell to check the healthiness of my motor,oil pressure is good also

[Paddles]

ifs it only fuel smoke, just sounds likes its running a bit rich, maybe change air fuel mixture a tad.

[Sigmaproject]

Gn's are loaded up with so much polution gear, that you would need to be a rocket scientist to track any fuel related problem.

Try float level and make sure all the fixed jets are tight.

[boogernissan]

im thinkin i should flog off the standard carb and slap a weber on it

[panda]

If its running rich, then it ain't getting enough air, check your air filter, or do a run with no filter at all & note the effect. If its still rich, then its a fuel problem.

panda

[75wagon]

Am I wrong, but isn't the air fuel mixture screw only adjust the mixture at idle?
Isn't the only way to change the mixture above idle to change the jet sizes?

If it has the original carby, I'd suggest that unless something is seriously wrong with the carb, then your smoke is probably worn rings.

I've always understood smoke to happen in these circumstances:
Smoke on acceleration is rings
Smoke on deacceleration is valve stems or the valve stem seals

Dave

[boogernissan]

cant be rings,i did a comp test and they came up around 15-160 psi all the way across the motor,its blacksmoke and stinks like fuel,seems to have gotten better over the last week or so,i been playin with the fuel mixture and seems to have fixed it,gonna get a new aircleaner aswell and do sumthin about the intake cos the stock one is crap

[75wagon]

That's good then

[tezzz]

black smoke fuel . blue smoke oil. white smoke water. grey smoke cigarettes.