1yr can be ok,,on fuel... i think we should start over.... from scratch.
bad gas can clog those 10-micron tiny screens in the 4 injectors. (needs ultrasound reverse flow methods to clean)
what we do is if all sensors read right,
and fuel pressure is spec.
then by process of elimination, the injectors must be clogged.
did you take a sample of gas., and smell it and look water to separate out. colors is light amber in USA.
the one thing we cant do is test injectors for full flow.
we can check the pulse widths on a scope,. and see that the ECU is pulsing them prefect and if they are, then they are clogged.
You never told me door count.
the 2 door loves to rust the 2 pump wires behind the left tail light lens. or center rear bumper, same wires pink power , blk ground.
g402 screw there rusty.?
http://www.fixkick.com/INJECTORS/PUMP/de....html#G402
what if the pink wire was rusty, there, in that connector seen on same page.
and only 8volts to the pump.?? oops, that wont work., it needs FULL VOLTAGE.
???
that is why having a fuel pressure gauge, tells you, pressure good or not, and can change at next bump in road, then what, then pump has notw got full 12vdc to it.
and pressure falls.
your mechanic i bet, didnt see it failing did he,.??? if did, why didnt he fix it? (engine good, spark good, fueling wrong, find why)
so never found it.? he gave up?
to fix cars, diagnose them failing only.
first is fuel pressure
no injector runs with 20psi.
pressure first , aways.
the ECU can not know its wrong, ever. so... if wrong, it COMPUTES WRONG. (under injects)
it assumes its right and if is the then flows are correct, and you get full power. (injectors not clogged)
harbor freight sells the gauge for $20 (with free suzuki hose_
its one of the most important tools to own, saving you many long hours of labor and a bath in gas,,, best $20 ever spent, each time if discover, pressure is good. move on.
what if the pulses were small on injectors
the MAF is dirty.
if you unplug, it the MAF missing trips, failsafe it the fueling goes rich is a pig,
ever clean the maf? (from 1foot distances with maf cleaner)>
is the ECU flashing code 12s on demand>?
key on, CEL on, is it?
then insert diag jumper
key on, flash 12s?
this is first, if cel is dead so is ECU, that is if the nag switch is not present as it is on all Fed cars. usa.
if it has the nag, and will not flash 12s remove the switch, (or slide it one time)
scratch,
key CEL lamp.
and code 12 flashing or if not starting crank for 5full seconds, still code 12 or code 42 or 41 or?
next is ECT ohms at 34f or what ever, F temp is there. 5000 ohms cold is good ect, at that temp. this causes proper injection to start any engine, at that 35f temp (coolant) fuel vapor pressures, are why,...
cold fuel is hard to vaporize. so runs richer there. all the way to -40F , richer step by step.
do the MAF tests next.
if the maf is weak, then engine goes lean
the voltages are on my maf page.
key on
The voltage observed should be 1.0–1.6 volts.
idle is (exact specification is 1.7–2.0 volts) at idle
check for loss of spark anytime engine will not start
check timing too, if the timing belt idler is loose, not set with its index tang it goes loose and spark goes way out of time, with cam.
ok , it wont start so does test fuel work no, IT MUST. if not say so.
my guess i will. and sounds perfect for 3seconds, repeat 3 times for good feelings effects.
so the FPR pinch test works.
what is next.?
fuel pressure, (repeat any time engine fails to run and test fuel test passes)
my guess is engine is ok, and CAT not melted and EGR valve is closed.
a not running engine is very easy to diagnose. after all its failing now..!!!
https://www.youtube.com/watch?v=064Ilsz8...ature=fvwp
keep in mind a dry rail means dead pump.
but a dribbling rail dont mean a damn thing.
only spec pressure runs engine and makes full power. only.
my motor cycle runs with 0 pressure, gravity tank,, no EFI will ever do that.
the trouble with old cars, tests pass, and fail 1hr later.
must be dogmatic in your tests.
to find these.
bad gas can clog those 10-micron tiny screens in the 4 injectors. (needs ultrasound reverse flow methods to clean)
what we do is if all sensors read right,
and fuel pressure is spec.
then by process of elimination, the injectors must be clogged.
did you take a sample of gas., and smell it and look water to separate out. colors is light amber in USA.
the one thing we cant do is test injectors for full flow.
we can check the pulse widths on a scope,. and see that the ECU is pulsing them prefect and if they are, then they are clogged.
You never told me door count.
the 2 door loves to rust the 2 pump wires behind the left tail light lens. or center rear bumper, same wires pink power , blk ground.
g402 screw there rusty.?
http://www.fixkick.com/INJECTORS/PUMP/de....html#G402
what if the pink wire was rusty, there, in that connector seen on same page.
and only 8volts to the pump.?? oops, that wont work., it needs FULL VOLTAGE.
???
that is why having a fuel pressure gauge, tells you, pressure good or not, and can change at next bump in road, then what, then pump has notw got full 12vdc to it.
and pressure falls.
your mechanic i bet, didnt see it failing did he,.??? if did, why didnt he fix it? (engine good, spark good, fueling wrong, find why)
so never found it.? he gave up?
to fix cars, diagnose them failing only.
first is fuel pressure
no injector runs with 20psi.
pressure first , aways.
the ECU can not know its wrong, ever. so... if wrong, it COMPUTES WRONG. (under injects)
it assumes its right and if is the then flows are correct, and you get full power. (injectors not clogged)
harbor freight sells the gauge for $20 (with free suzuki hose_
its one of the most important tools to own, saving you many long hours of labor and a bath in gas,,, best $20 ever spent, each time if discover, pressure is good. move on.
what if the pulses were small on injectors
the MAF is dirty.
if you unplug, it the MAF missing trips, failsafe it the fueling goes rich is a pig,
ever clean the maf? (from 1foot distances with maf cleaner)>
is the ECU flashing code 12s on demand>?
key on, CEL on, is it?
then insert diag jumper
key on, flash 12s?
this is first, if cel is dead so is ECU, that is if the nag switch is not present as it is on all Fed cars. usa.
if it has the nag, and will not flash 12s remove the switch, (or slide it one time)
scratch,
key CEL lamp.
and code 12 flashing or if not starting crank for 5full seconds, still code 12 or code 42 or 41 or?
next is ECT ohms at 34f or what ever, F temp is there. 5000 ohms cold is good ect, at that temp. this causes proper injection to start any engine, at that 35f temp (coolant) fuel vapor pressures, are why,...
cold fuel is hard to vaporize. so runs richer there. all the way to -40F , richer step by step.
do the MAF tests next.
if the maf is weak, then engine goes lean
the voltages are on my maf page.
key on
The voltage observed should be 1.0–1.6 volts.
idle is (exact specification is 1.7–2.0 volts) at idle
check for loss of spark anytime engine will not start
check timing too, if the timing belt idler is loose, not set with its index tang it goes loose and spark goes way out of time, with cam.
ok , it wont start so does test fuel work no, IT MUST. if not say so.
my guess i will. and sounds perfect for 3seconds, repeat 3 times for good feelings effects.
so the FPR pinch test works.
what is next.?
fuel pressure, (repeat any time engine fails to run and test fuel test passes)
my guess is engine is ok, and CAT not melted and EGR valve is closed.
a not running engine is very easy to diagnose. after all its failing now..!!!
https://www.youtube.com/watch?v=064Ilsz8...ature=fvwp
keep in mind a dry rail means dead pump.
but a dribbling rail dont mean a damn thing.
only spec pressure runs engine and makes full power. only.
my motor cycle runs with 0 pressure, gravity tank,, no EFI will ever do that.
the trouble with old cars, tests pass, and fail 1hr later.
must be dogmatic in your tests.
to find these.
http://www.fixkick.com