evo pulling mass timing?
May 16, 2009, 01:33 AM
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evo pulling mass timing?
my evo is pulling 36* of timing?? always seems to happen between 2000rpm and 3200rpm? some times at other points too? took it to a tuner and saw this happening when driving it, its reading knocks? maybe it is knocking but it seems doughtful? maybe bad knock sensor? any ideas would help thanks
May 16, 2009, 05:29 AM
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it could be a number of things affecting your tune (thats if you did get tuned by someone), don't assume its phantom knock or anything like that, make sure everything is working properly, then check to see if you have any loose objects banging around,
our knock sensors are sensitive enough to pick stuff like that and think its knock and pull timing, a list of any mods would help out
our knock sensors are sensitive enough to pick stuff like that and think its knock and pull timing, a list of any mods would help out
May 16, 2009, 08:11 AM
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i will definantly check for loose objects, can the actual sensor be loose? my mods are turboback exhaust, drop in k&n filter, lower ic piping and a forge mbc running stock boost @19psi, it was tuned when the previous owner had the car. im not sure whats happening? all i saw was that when the laptop was hooked in we did a couple pulls and it showed us the car was pulling 36* timing? how can that be if my evo is still running?
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May 16, 2009, 12:02 PM
#10
ECU pulls 12.7 degrees of timing for a maximum knock sum of 36, and will at the same time be moving towards your low octane ignition map which will usually add even more retard.
A noise that is not knock so doesn't repond to ignition retard can quickly build each ignition event until it climbs to 36. Possible reasons are high clearance forged pistons, valvetrain problems, faulty or loose knock sensor, stiff engine mounts, something loose etc.
A noise that is not knock so doesn't repond to ignition retard can quickly build each ignition event until it climbs to 36. Possible reasons are high clearance forged pistons, valvetrain problems, faulty or loose knock sensor, stiff engine mounts, something loose etc.
May 16, 2009, 12:44 PM
#11
ECU pulls 12.7 degrees of timing for a maximum knock sum of 36, and will at the same time be moving towards your low octane ignition map which will usually add even more retard.
A noise that is not knock so doesn't repond to ignition retard can quickly build each ignition event until it climbs to 36. Possible reasons are high clearance forged pistons, valvetrain problems, faulty or loose knock sensor, stiff engine mounts, something loose etc.
A noise that is not knock so doesn't repond to ignition retard can quickly build each ignition event until it climbs to 36. Possible reasons are high clearance forged pistons, valvetrain problems, faulty or loose knock sensor, stiff engine mounts, something loose etc.
May 16, 2009, 09:38 PM
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ok wow so now i feel pretty dumb lol from what u guys are saying and explaining, the tuner i go to isnt very good at what he does, he told me its pull 36 degrees, maybe he ment knock was at 36, either way i think its time to find a new tuner, i thing ill pay a visit to english racing from now on thanks guys for clearing things up for me
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