test fuel , it runs prefect after test fuel, test, during the 1hour down times?
keep i find , that test fuel (ether) can in fact start a flooded engine . because this instant start fluid, is hotter than gasoline.
is the injector dead, at stall, (pull the air horn and look cranking?)
the key hear, is why the 1hour down time. (lost spark, bad fueling)
the only why to tell is spark tip examination , and direct viewing the injector , during the down time.
seems like its a fueling issue.
doing the down time, keep the Diagnostic jumper in place, crank, no crank up, no start, (down time) and see if you get code 41 if you are then its spark read back, cutting out injections. the rule is to crank for 5 seconds. release the key, 12's gone, 41, no present. (ECU see's tachometer signal dead and cuts fuel)
ive seen this many times. the ECU cuts fueling. when you hit a bum and the caps in the ECU are all dried out.. the insides, of the caps , short, as you hit a bump and the ECU crashes.
for sure the 1 hour down time, is the key , here, 2 tests.
spark ok, ?
code 12 not, 41s. cranking (suppressor module loose in socket? or tachometer or its wires shorting this spark readback to ground, 41's , bang.
look at injector, dead or squirting crankiing. if dead, injector, do the NOID light fails. and the ECU is bad.
there is one other possible , the TPS ground is opening up, this causes ECU to enter unflood mode, WOT, is full time.
most my tests are useless if the engine runs, after all , cant fix it if broken.
but you can lay in traps.
here are 3 traps, car runs, waiting for the 1hour, death.
1: voltmeter to the ignition line, monitoring power to ECU, (@ IGcoil fuse or FI fuse) either or both dropping dead 0 volts, kills all injections or spark..
2: spark strobe light connected to a spark plug wire, and flashing away waiting for a speed bumpb. my guess is this passes.
3: adding a hose to the intake plenum, to a propane tank , sitting on passenger seat, hit speed bump, engine stalls, i crack the propane cylinder wide open, bang, car takes off. (lost fuel)
or inspect ECU for leaking caps, all 89-95 ECU fail 1 time for this. Rubicon disease
http://www.fixkick.com/ECU/ECU.html
my guess?, is lost 12v to ECU, at bump. one offroad, had rusted fuses in fuse box above right knee... (water leaks)
or bad ecu, causing Injector to stall.
bad grounds..
http://www.fixkick.com/Good_Bad_Ugly/com...lures.html
or MR, fender fuse box. classic.
![[Image: fuse-box1-failure2.jpg]](http://www.fixkick.com/fuse-box1-failure2.jpg)
we can find this.
its lost spark or lost fuel. (it not lash getting too tight, and lost compression hot failure and causing no starts) test fuel proved that.
if you find out injection is failing dead, we can find why.
there are only 2 inputs to the ecu (not counting power and ground that kills injections) a volt meter can find bad power. to ECU. at the failure moment and during 1hr, no starts.
1: TPS stuck at 4-5v. TP pin, (normal is 1v) "magic unflood mode "
2: spark read back line is dead, (tachometer drops to zero RPM , the ECU cuts fuel fast) The dizzy makes spark and ECU pin A1 , monitors this pin full time.
note how ECU has no CMP sensor. in 1990. see my horses up schematic.
http://www.fixkick.com/fuse-box1-failure2.jpg
keep i find , that test fuel (ether) can in fact start a flooded engine . because this instant start fluid, is hotter than gasoline.
is the injector dead, at stall, (pull the air horn and look cranking?)
the key hear, is why the 1hour down time. (lost spark, bad fueling)
the only why to tell is spark tip examination , and direct viewing the injector , during the down time.
seems like its a fueling issue.
doing the down time, keep the Diagnostic jumper in place, crank, no crank up, no start, (down time) and see if you get code 41 if you are then its spark read back, cutting out injections. the rule is to crank for 5 seconds. release the key, 12's gone, 41, no present. (ECU see's tachometer signal dead and cuts fuel)
ive seen this many times. the ECU cuts fueling. when you hit a bum and the caps in the ECU are all dried out.. the insides, of the caps , short, as you hit a bump and the ECU crashes.
for sure the 1 hour down time, is the key , here, 2 tests.
spark ok, ?
code 12 not, 41s. cranking (suppressor module loose in socket? or tachometer or its wires shorting this spark readback to ground, 41's , bang.
look at injector, dead or squirting crankiing. if dead, injector, do the NOID light fails. and the ECU is bad.
there is one other possible , the TPS ground is opening up, this causes ECU to enter unflood mode, WOT, is full time.
most my tests are useless if the engine runs, after all , cant fix it if broken.
but you can lay in traps.
here are 3 traps, car runs, waiting for the 1hour, death.
1: voltmeter to the ignition line, monitoring power to ECU, (@ IGcoil fuse or FI fuse) either or both dropping dead 0 volts, kills all injections or spark..
2: spark strobe light connected to a spark plug wire, and flashing away waiting for a speed bumpb. my guess is this passes.
3: adding a hose to the intake plenum, to a propane tank , sitting on passenger seat, hit speed bump, engine stalls, i crack the propane cylinder wide open, bang, car takes off. (lost fuel)
or inspect ECU for leaking caps, all 89-95 ECU fail 1 time for this. Rubicon disease
http://www.fixkick.com/ECU/ECU.html
my guess?, is lost 12v to ECU, at bump. one offroad, had rusted fuses in fuse box above right knee... (water leaks)
or bad ecu, causing Injector to stall.
bad grounds..
http://www.fixkick.com/Good_Bad_Ugly/com...lures.html
or MR, fender fuse box. classic.
we can find this.
its lost spark or lost fuel. (it not lash getting too tight, and lost compression hot failure and causing no starts) test fuel proved that.
if you find out injection is failing dead, we can find why.
there are only 2 inputs to the ecu (not counting power and ground that kills injections) a volt meter can find bad power. to ECU. at the failure moment and during 1hr, no starts.
1: TPS stuck at 4-5v. TP pin, (normal is 1v) "magic unflood mode "
2: spark read back line is dead, (tachometer drops to zero RPM , the ECU cuts fuel fast) The dizzy makes spark and ECU pin A1 , monitors this pin full time.
note how ECU has no CMP sensor. in 1990. see my horses up schematic.
http://www.fixkick.com/fuse-box1-failure2.jpg
http://www.fixkick.com