low fuel pressure,
the 02 is inactive when accelerating so not 02. mostly its just the MAF , air flow , dictating fuel injection rates. then.
low fuel pressure or clogged injectors.
94 G16b
with the TPS unplugged, injection pulse widths are excessive, and can hide, low fuel pressure or clogging.
with the TPS plugged in , do you have full WIDE open power, up a hill. (manual or stick tranny?) in 3rd gear for stick tranny, up hills uses max fuel.
injector cantacts (those two under TB/air intake )are pretty dirty? the injector connectors are dirty? or just outside of it?
if the fuel pressures drops, too low the MAF and ECU dont know that, and fueling rates drop.
the spec. pressure is 30-37 PSI. idling , 19inches /HG. vacuum.
when you go WOT, the pressure, rises (+6 PSI) on the injector to compensate for increased atmosphere pressure at the injector tips (plenum is open now)
so if say the FPreg is bad. and that dont happen, the fueling will go lean. (not limphome, and limphome is the least documented feature of Suzuki, poor)
the key on pressure spec, is 36 to 43)
lets say your FPreg is 36 psi , key on 3 times. no start.
then you start engine, at idle its now 30. it will be 6 PSI less due to the 1:1 rule. vacuum to pressure rule.
when you drive real fast and cut the throttle this car fuel pressure, will drop in a hard vacuum, by 14psi from key on pressure. 34-14= 20 line pressure.
then when wide open throttle the plenum nears 1 atmosphere so pressure will be near key on pressure, say , 36.
if the Fpreg goes bad. (lots of ways sadly) but if bad. it can stuck low? or be dead. or? leak.
if it sticks low engine will bog. The ECU, wants near 36 psi during that ACCELERATION EVENT. this higher pressure fuel overcomes the atmospheric pressure of at injector tips.
on new cars this pressure is monitored, and you will get codes. if out of spec. but not this car ,codes=DTCs/
if the car is a daily driver, most likely that fresh fuel every day ,the injector are clean.
but what about FPREG>>?>>>???
http://www.fixkick.com/sensors/tests/FPress-reg1.html
i should make a fpreg chart, yes...... too soon.
Gringo and ROTW (rest of the world)
![[Image: reg-graph-mpi-g.jpg]](http://www.fixkick.com/INJECTORS/PUMP/reg-graph-mpi-g.jpg)
the 02 is inactive when accelerating so not 02. mostly its just the MAF , air flow , dictating fuel injection rates. then.
low fuel pressure or clogged injectors.
94 G16b
with the TPS unplugged, injection pulse widths are excessive, and can hide, low fuel pressure or clogging.
with the TPS plugged in , do you have full WIDE open power, up a hill. (manual or stick tranny?) in 3rd gear for stick tranny, up hills uses max fuel.
injector cantacts (those two under TB/air intake )are pretty dirty? the injector connectors are dirty? or just outside of it?
if the fuel pressures drops, too low the MAF and ECU dont know that, and fueling rates drop.
the spec. pressure is 30-37 PSI. idling , 19inches /HG. vacuum.
when you go WOT, the pressure, rises (+6 PSI) on the injector to compensate for increased atmosphere pressure at the injector tips (plenum is open now)
so if say the FPreg is bad. and that dont happen, the fueling will go lean. (not limphome, and limphome is the least documented feature of Suzuki, poor)
the key on pressure spec, is 36 to 43)
lets say your FPreg is 36 psi , key on 3 times. no start.
then you start engine, at idle its now 30. it will be 6 PSI less due to the 1:1 rule. vacuum to pressure rule.
when you drive real fast and cut the throttle this car fuel pressure, will drop in a hard vacuum, by 14psi from key on pressure. 34-14= 20 line pressure.
then when wide open throttle the plenum nears 1 atmosphere so pressure will be near key on pressure, say , 36.
if the Fpreg goes bad. (lots of ways sadly) but if bad. it can stuck low? or be dead. or? leak.
if it sticks low engine will bog. The ECU, wants near 36 psi during that ACCELERATION EVENT. this higher pressure fuel overcomes the atmospheric pressure of at injector tips.
on new cars this pressure is monitored, and you will get codes. if out of spec. but not this car ,codes=DTCs/
if the car is a daily driver, most likely that fresh fuel every day ,the injector are clean.
but what about FPREG>>?>>>???
http://www.fixkick.com/sensors/tests/FPress-reg1.html
i should make a fpreg chart, yes...... too soon.
Gringo and ROTW (rest of the world)
http://www.fixkick.com