only after....
well the only way 51s can come alive by magic is exiting LIMPHOME. (or the thermostat starts working for first time) (or ecu is in LOST mode, ask)
in limp home (suzuki failsafe) or backup mode, there are no 51 checks...
in limphome, the ECU knows the engine is rich as a pig (it did that) and knows rich is cold combustion, and no NOX.
but more important, failsafe means OUT of control EFI so the finer points or smog, are NOT possible. the CAT then determines all smog at that point.
keep in mind, an out of control EFI can go 2 ways, lean and burn up valves, or rich, and save them. and rich CUTS the most nasty pollution of them all NOX. (acid rain, etc,etc)
the whole thing is designed to stop NOX, end to end, even when Broken.
sure
to right of finger
http://www.fixkick.com/fresh-air/Slide_S...ge_28.html
at top here
http://www.fixkick.com/fresh-air/Slide_S...ge_21.html
at bottom here
http://www.fixkick.com/fresh-air/Slide_S...ge_22.html
note in last view, no hole seen in bore, on plenum side, its ported vacuum.
the line is dead, to you raise the throttle
this is so (i think) the engine can not die with VSV stuck open.
and the idle , not idle and WOT , no EGR logic rules.
keep in mine this ecu is near brick stupid by today's standard.
it really is.
and back when, it can get lost. (sure can and guess what?, no DTC for lost, is that dumb or what?)
if the ecu don't know why, it can not control fuel, it's lost. this is a state to be in. (it also can not detect a weak maf, only dead ones)
eg: gross lean. or fuel pressure stuck at 60psi. FPreg dead. jammed.
the ECU only knows to mix fuel by mAF and to run closed loop. Hot. if closed loop fails the MAF plus all illegal air leaks wins the day. (or not)
there is no book, or text on the ECu disclosing allways, the 51 monitor can be suspended, but it sure will and does.
the best source is a 1995 real suzuki FSM, it does pretty good.
keep in mind, if new cars are near AI in the ECU world, (they are not) then this is the anti-thesis to that. Brick dumb, no worse.
using a real scan tool , solves all this. mostly
eg:
Omg, no closed loop at hot idle , oh my a crack near the (exh) front 02,(no rear on 95) makes 02 lie like dog.
Hark, the maf is weak,
or, the o2 is stuck lean.
or , why is the ETC reading, 140f hot. oops.
or , why is the LTFT stuck at +40 , weak maf, or air leaks. (a huge long track, maf to head.)
51s is last. dead last. and then idle controls behind that...
btw on the 1996 it suspends many tests, due to gross failures . of other tests.
o2 fails, cut the 420 test. of cat, on mine.
its smarter, it knows, the cat can not be tested with a bad front sensors. no way; no how.
the suspension rules are the most , poorly documented features of all ECU made.
far better, is to take stock off all readings
and correct the basics and then work out to the more complex.
this always works..
my master (my mentor) says.
no that is wrong.
he has 5 gas system, ($20000 bucks on a cart)
and he starts at the tail end of the exhaust pipe and works forward, to the cause. he is correct. 100% but he is not DIY. (he is looking at 02 like blood hound)
these test are all on motor.com. the book or mag.
http://www.motor.com/articles.asp
whats cool the old issues are online. these guys RULE !
well the only way 51s can come alive by magic is exiting LIMPHOME. (or the thermostat starts working for first time) (or ecu is in LOST mode, ask)
in limp home (suzuki failsafe) or backup mode, there are no 51 checks...
in limphome, the ECU knows the engine is rich as a pig (it did that) and knows rich is cold combustion, and no NOX.
but more important, failsafe means OUT of control EFI so the finer points or smog, are NOT possible. the CAT then determines all smog at that point.
keep in mind, an out of control EFI can go 2 ways, lean and burn up valves, or rich, and save them. and rich CUTS the most nasty pollution of them all NOX. (acid rain, etc,etc)
the whole thing is designed to stop NOX, end to end, even when Broken.
sure
to right of finger
http://www.fixkick.com/fresh-air/Slide_S...ge_28.html
at top here
http://www.fixkick.com/fresh-air/Slide_S...ge_21.html
at bottom here
http://www.fixkick.com/fresh-air/Slide_S...ge_22.html
note in last view, no hole seen in bore, on plenum side, its ported vacuum.
the line is dead, to you raise the throttle
this is so (i think) the engine can not die with VSV stuck open.
and the idle , not idle and WOT , no EGR logic rules.
keep in mine this ecu is near brick stupid by today's standard.
it really is.
and back when, it can get lost. (sure can and guess what?, no DTC for lost, is that dumb or what?)
if the ecu don't know why, it can not control fuel, it's lost. this is a state to be in. (it also can not detect a weak maf, only dead ones)
eg: gross lean. or fuel pressure stuck at 60psi. FPreg dead. jammed.
the ECU only knows to mix fuel by mAF and to run closed loop. Hot. if closed loop fails the MAF plus all illegal air leaks wins the day. (or not)
there is no book, or text on the ECu disclosing allways, the 51 monitor can be suspended, but it sure will and does.
the best source is a 1995 real suzuki FSM, it does pretty good.
keep in mind, if new cars are near AI in the ECU world, (they are not) then this is the anti-thesis to that. Brick dumb, no worse.
using a real scan tool , solves all this. mostly
eg:
Omg, no closed loop at hot idle , oh my a crack near the (exh) front 02,(no rear on 95) makes 02 lie like dog.
Hark, the maf is weak,
or, the o2 is stuck lean.
or , why is the ETC reading, 140f hot. oops.
or , why is the LTFT stuck at +40 , weak maf, or air leaks. (a huge long track, maf to head.)
51s is last. dead last. and then idle controls behind that...
btw on the 1996 it suspends many tests, due to gross failures . of other tests.
o2 fails, cut the 420 test. of cat, on mine.
its smarter, it knows, the cat can not be tested with a bad front sensors. no way; no how.
the suspension rules are the most , poorly documented features of all ECU made.
far better, is to take stock off all readings
and correct the basics and then work out to the more complex.
this always works..
my master (my mentor) says.
no that is wrong.
he has 5 gas system, ($20000 bucks on a cart)
and he starts at the tail end of the exhaust pipe and works forward, to the cause. he is correct. 100% but he is not DIY. (he is looking at 02 like blood hound)
these test are all on motor.com. the book or mag.
http://www.motor.com/articles.asp
whats cool the old issues are online. these guys RULE !
http://www.fixkick.com