11-04-2016, 10:30 PM
Back ground information::::
the car has a a 8 Valve G16a TBI engine, using a TBI based EFI single injector
the ECU does all injection calculations,
the ECU uses sensors to inject,
if fuel pressure is at spec, then the ecu has a chance of injecting properly.
it does that with sensors. (map,ECT,IAT,O2,)
This year ECU can not detect weak sensors, only totally dead ones.
Back then shop has scan tool called a tech1, (long gone and worn out dead) and this scanner can in fact read near live sensor data.
you have no such tool, nor I, and we must use meters to check sensors.
The injector must not leak.
The fuel pressure is found to be 50 to 60psi ,may be a fuel return line pinched or crushes in an offroad, hazard. etc.
The ECU is totally stupid in this regard, if fuel pressure is wrong the ECU just trusts it and injects wrong. this is how all suzuki work until late 2000's
if you have a DMM meter, most the tests are easy.
if not , humans can not measure volts/ohm/amps, temperatures , pressures, at all. It does take tools to fix cars, meaning simple gauges and meters.
Even the o2 sensors this old on the manifold are most times seen as shot (dead), take it out. and most look after 20 + years, look like wreck. totally wrecked.....(normal action so long)
if O2 is dead, and reads 0v all times the ECU goes full rich. then misfires and sucks fuel like crazy. (low engine power too)
the car has a a 8 Valve G16a TBI engine, using a TBI based EFI single injector
the ECU does all injection calculations,
the ECU uses sensors to inject,
if fuel pressure is at spec, then the ecu has a chance of injecting properly.
it does that with sensors. (map,ECT,IAT,O2,)
This year ECU can not detect weak sensors, only totally dead ones.
Back then shop has scan tool called a tech1, (long gone and worn out dead) and this scanner can in fact read near live sensor data.
you have no such tool, nor I, and we must use meters to check sensors.
The injector must not leak.
The fuel pressure is found to be 50 to 60psi ,may be a fuel return line pinched or crushes in an offroad, hazard. etc.
The ECU is totally stupid in this regard, if fuel pressure is wrong the ECU just trusts it and injects wrong. this is how all suzuki work until late 2000's
if you have a DMM meter, most the tests are easy.
if not , humans can not measure volts/ohm/amps, temperatures , pressures, at all. It does take tools to fix cars, meaning simple gauges and meters.
Even the o2 sensors this old on the manifold are most times seen as shot (dead), take it out. and most look after 20 + years, look like wreck. totally wrecked.....(normal action so long)
if O2 is dead, and reads 0v all times the ECU goes full rich. then misfires and sucks fuel like crazy. (low engine power too)
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