re setting co on l6
#1
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re setting co on l6
Been having trouble getting my co down and im worried ive played with it to much
anyone know how to get the co screw back to centre ?
cheers paul
anyone know how to get the co screw back to centre ?
cheers paul
#2
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I think but not sure by any means it is 5 turns counter clockwise, then 1 1/2 clockwise to get somewhere near, shouldn't play with "it" so much naughty boy ha ha!!
tabetha
tabetha
#6
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to do it properly
run engine up to temp
unplugg the iscv (leave engine running) (iscv is on top the throttle body grey plug)
adjust idle on throttle body screw to 900rpm
re connect iscv, and idle should stay stable. (you need to do the above before the cooling fans come on!)
then 5 turns on the screw, this takes it back past zero, then 2.5 turns out.
Remember,its a potentiometer, not a normal screw, so it only adjusts a certain amount, no more or no less, even if you turn it 100 times, turning it back 5 times will still take it to zero.
what chip are you running and what does the CO% have to be at idle according to your chip?
run engine up to temp
unplugg the iscv (leave engine running) (iscv is on top the throttle body grey plug)
adjust idle on throttle body screw to 900rpm
re connect iscv, and idle should stay stable. (you need to do the above before the cooling fans come on!)
then 5 turns on the screw, this takes it back past zero, then 2.5 turns out.
Remember,its a potentiometer, not a normal screw, so it only adjusts a certain amount, no more or no less, even if you turn it 100 times, turning it back 5 times will still take it to zero.
what chip are you running and what does the CO% have to be at idle according to your chip?
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5 turns then 2.5 either way mate ?
its a msd 380+ chip for greys & t38 on l6, cant get the co any lower than 9.05%, its in the 10's - 11's on idle on my innovative cruise is around 13.5-14 so not to bad there but full chat its been known to go into the 9's
ive changed the water temp, air charge and map sensor and its still the same, prob going to send it back to msd for them to check as im running out of ideas, also had the inlet off and checked all hoses for leaks
cheers for the reply
its a msd 380+ chip for greys & t38 on l6, cant get the co any lower than 9.05%, its in the 10's - 11's on idle on my innovative cruise is around 13.5-14 so not to bad there but full chat its been known to go into the 9's
ive changed the water temp, air charge and map sensor and its still the same, prob going to send it back to msd for them to check as im running out of ideas, also had the inlet off and checked all hoses for leaks
cheers for the reply
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#20
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If all the plugs are the same colour unlikely to be an injector fault.
They, ie cossie engines don't need to be this rich, mine idled 100% perfect at 0.97% CO, 137ppm and NO CLOSED LOOP, oh with 200,973 miles on it, on GREYS.
Best thing I ever did was ditch the w/m ecu, wouldn't even use a free one if already set up.
All you can do is go through the usual, which you certainly seem to have covered.
tabetha
They, ie cossie engines don't need to be this rich, mine idled 100% perfect at 0.97% CO, 137ppm and NO CLOSED LOOP, oh with 200,973 miles on it, on GREYS.
Best thing I ever did was ditch the w/m ecu, wouldn't even use a free one if already set up.
All you can do is go through the usual, which you certainly seem to have covered.
tabetha
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I did take the plugs out a while back to clean them and they all look pretty much the same colour i will check that again tomorrow i never thought of doing that
what would say number 2 look like if it was leaking ?
what would say number 2 look like if it was leaking ?
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the chip is the only thing ive changed mate used to idle at 14 with the a1 chip but cant not on the msd one, its using so much fuel its unbelivable, when i boot it its like an episode of stars in their eyes
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its not that bad at idle considering the fuel there does chuff abit though, realy smokes on start up though
to be fair ive spoken to kenny and steve and theyve been realy helpfull so fingers crossed it is the chip because ive run out opf ideas
to be fair ive spoken to kenny and steve and theyve been realy helpfull so fingers crossed it is the chip because ive run out opf ideas
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Got my ecu & chip back from msd this morning in record time, found no faults although they did adjust the chip slightly as i forgot to mention the 4x4 inlet & spacer i had
Cruise whise the fueling is bang on at 14.4 - 14.8
Idle is still very rich and also on boost, now i was playing around on idle and when you slightly press the throttle almost nothing the fuel drops right off to 14-14.5
could this be due to a tps fault ? i did set the tps a while back to what i though was ok, it also sometimes drops off its self then richens up again
Cruise whise the fueling is bang on at 14.4 - 14.8
Idle is still very rich and also on boost, now i was playing around on idle and when you slightly press the throttle almost nothing the fuel drops right off to 14-14.5
could this be due to a tps fault ? i did set the tps a while back to what i though was ok, it also sometimes drops off its self then richens up again
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Had the car set up a few days ago and all is good apart from the idle co, msd are going to recalibrate the idle fueling for me, theyve been very helpfull mate so get in contact and im sure they can help
#37
99% of the time these issues are set up faults, i see cars everyday running our chips which are supplied off the shelf and if correctly set up they just work fine, which is why we are confident when we supply them they will work.
other issues which we come across, are peoples engine specs which sometimes for one reason or another are not what they think, and means large changes in manifold depression, this in turn causes the ecu to reference a different load site at idle than we would normally see, and these sites may have more fuel in them, as an example, this can be caused by head work, cams, poor lifters, or any number of small changes people have made over the cars life.
we are always more than happy to tweek files and get the most out of them for you, there is no question of that, but you need to be 100% sure everything your end is correct. if we go taking fuel out of a map we know works on hundreds of other cars of your spec there MUST be a reason why yours doesnt work, and if you then go and rectify that issue at a later date you can so easily loose an engine so we HAVE to be very carefull for your own good.
other issues which we come across, are peoples engine specs which sometimes for one reason or another are not what they think, and means large changes in manifold depression, this in turn causes the ecu to reference a different load site at idle than we would normally see, and these sites may have more fuel in them, as an example, this can be caused by head work, cams, poor lifters, or any number of small changes people have made over the cars life.
we are always more than happy to tweek files and get the most out of them for you, there is no question of that, but you need to be 100% sure everything your end is correct. if we go taking fuel out of a map we know works on hundreds of other cars of your spec there MUST be a reason why yours doesnt work, and if you then go and rectify that issue at a later date you can so easily loose an engine so we HAVE to be very carefull for your own good.
Last edited by James @ M Developments.; 12-06-2010 at 09:36 AM.
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