Curtoise
06-07-12, 06:05 PM
right i have run out of things that could be causing this now.... i have a e16se which is standard apart from a 4 branch exhaust. now it all started as soon as i put it in about 4-5 months ago.
I had the head skimmed and they took too much off which is what i thought the problem was, so i got hold of another low mileage head and it didnt solve the problem.
Now the timing is dead spot on and it pinks under load only......
I have checked for any air leaks and solved the few i had (replaced intake pipe) i have blanked off all the valves (coasting air valve, supplementary air valve) to make sure there is not excessive air getting in causing it to run lean. i have had the CO set up spot on so the mixture is correct.
now does anyone know why else it could be pinking??
i have one idea that the fuel pump is not good enough (got it out of a mpi astra) but then i would expect flat spots through the rev range.
another thing to note is that it pinks LESS on Super unleaded (higher octane) than it does on regular.
Also the ron plug is on 98 when i run on super, and it makes no difference what number it is on.
I once plugged it into a modis and it came up with a fault (ron coding circuit signal weak) so could this be a problem with my wiring?!
any help greatly apprecieated otherwise im going to have to swap engines. :thumb:
I had the head skimmed and they took too much off which is what i thought the problem was, so i got hold of another low mileage head and it didnt solve the problem.
Now the timing is dead spot on and it pinks under load only......
I have checked for any air leaks and solved the few i had (replaced intake pipe) i have blanked off all the valves (coasting air valve, supplementary air valve) to make sure there is not excessive air getting in causing it to run lean. i have had the CO set up spot on so the mixture is correct.
now does anyone know why else it could be pinking??
i have one idea that the fuel pump is not good enough (got it out of a mpi astra) but then i would expect flat spots through the rev range.
another thing to note is that it pinks LESS on Super unleaded (higher octane) than it does on regular.
Also the ron plug is on 98 when i run on super, and it makes no difference what number it is on.
I once plugged it into a modis and it came up with a fault (ron coding circuit signal weak) so could this be a problem with my wiring?!
any help greatly apprecieated otherwise im going to have to swap engines. :thumb: