07-06-2016, 11:15 AM
ok 41s are tricky
if the ecu sees 1 pulse in 10 fail, bam 41s , then if corrects, it forgets it saw it.
the book even says, how many turns of crank it takes to get 41s, (so, best to crank for 5sec, and not count turns.)
the 41s are very very tricky if intermediate.
the ecu wants to forget 41s, why, because ITS prime directive is to make spark and if it goofy, it gets confused, if the ignitor is dead, this is easy, hard 41s.
In early days (here) ecu , it models the crank shaft in memory and then syncs it to the engine Sensor. (imagine 2 crank shafts)
they turn is syn, the real crank and modeled crank. that is why it can ignore 1 missing plus. I tries to... (and not make smog)
it's really a good way to do this. on modern cars with live spark , those missing pulses are misfires.
knowing this helps to know that 41s can pop in and out, and are all signs of doom, 41s, are not tolerated by us.. we know its wrong and will get worse.
where is that pesky ignitor ?
if the ecu sees 1 pulse in 10 fail, bam 41s , then if corrects, it forgets it saw it.
the book even says, how many turns of crank it takes to get 41s, (so, best to crank for 5sec, and not count turns.)
the 41s are very very tricky if intermediate.
the ecu wants to forget 41s, why, because ITS prime directive is to make spark and if it goofy, it gets confused, if the ignitor is dead, this is easy, hard 41s.
In early days (here) ecu , it models the crank shaft in memory and then syncs it to the engine Sensor. (imagine 2 crank shafts)
they turn is syn, the real crank and modeled crank. that is why it can ignore 1 missing plus. I tries to... (and not make smog)
it's really a good way to do this. on modern cars with live spark , those missing pulses are misfires.
knowing this helps to know that 41s can pop in and out, and are all signs of doom, 41s, are not tolerated by us.. we know its wrong and will get worse.
where is that pesky ignitor ?
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