Overheated electronic component

[theChas.]

Is there an electroic component in a '89 Justy that could be dropping out
after about a quarter of an hour of running time?
.. . . .Or such a component on the computer power supply, is there is such a
thing?
I hate to take freon and go looking for the beast. TIA...

 

[strchild]

Care to share with us any of the symptoms which have caused you to ask the
question? Might possibly be a help to somebody and send you in a more
logical direction.

~Brian

 

[theChas.]

My shop had the Justy for 5 weeks and could not locate the component that
was 'droppping out'. They replaced the distributor, coil and attached
module, and a few other components.
.. . .The 'check engine' light is usually on, unless it is a very cold
morning. The problem has been isolated to ignition. The code readings are
'fuel mixture solenoid'. I purchased another used one (top half of the
carb) 3 years ago, and it made no difference. I had a foreign vehicle
specialist work on it and he discovered both 'fuel mixture solenoids' were
functioning properly and the 'empty bowl' sensors were also
okay.
Initially, the car starts with no problems. But after running about 12
minutes, it quits. If I park it before it quits, the 'latent' engine heat
is enough to keep it from starting for about 15 minutes. If I try to start
it after it has been parked, after a run, it takes about 15-20 minutes. It
also seems the more I try to start it, unsuccessfully, it prolongs the
'wait' time before it starts. Usually when I get towed home, it starts
about one block from my house.
.. . ..There is a transformer located in the engine compartment, on the right
fender well, that I believe may be a power supply/stablizer for the
computer...Car is 4 speed, and not injected. When it runs, it is a dream...
when it stalls, it is a study in patience.. . .thanks.
*********************

 

[Carl 1 Lucky Texan]

My shop had the Justy for 5 weeks and could not locate the component that
was 'droppping out'. They replaced the distributor, coil and attached
module, and a few other components.
. . .The 'check engine' light is usually on, unless it is a very cold
morning. The problem has been isolated to ignition. The code readings are
'fuel mixture solenoid'. I purchased another used one (top half of the
carb) 3 years ago, and it made no difference. I had a foreign vehicle
specialist work on it and he discovered both 'fuel mixture solenoids' were
functioning properly and the 'empty bowl' sensors were also
okay.
Initially, the car starts with no problems. But after running about 12
minutes, it quits. If I park it before it quits, the 'latent' engine heat
is enough to keep it from starting for about 15 minutes. If I try to start
it after it has been parked, after a run, it takes about 15-20 minutes. It
also seems the more I try to start it, unsuccessfully, it prolongs the
'wait' time before it starts. Usually when I get towed home, it starts
about one block from my house.
. . ..There is a transformer located in the engine compartment, on the right
fender well, that I believe may be a power supply/stablizer for the
computer...Car is 4 speed, and not injected. When it runs, it is a dream...
when it stalls, it is a study in patience.. . .thanks.
*********************

Hmmm...I can only point you to www.ultimatesubaru.org as another
possible resource for help.

Carl

 

[hippo]

It

Hmmm...I can only point you to www.ultimatesubaru.org as another
possible resource for help.

Carl

Probably no help but if I had an old Saab 900 doing something like this
I'd be substituting the fuel pump relay; but being a Justy I don't even
know if it has one! Cheers

 

[Bugalugs]

Probably no help but if I had an old Saab 900 doing something like this
I'd be substituting the fuel pump relay; but being a Justy I don't even
know if it has one! Cheers

My thoughts too

With the symptoms you described have you checked the fuel filter and the
flow from fuel pump.

 

[Carl 1 Lucky Texan]

My thoughts too

With the symptoms you described have you checked the fuel filter and the
flow from fuel pump.

Good points. Um - after it warms up and fails, are you missing fuel or
'fire'?


Carl

 

[theChas.]

Electric fuel pump, and filter (located underside of car under drivers
seat), are not the problem...it is strickly ignition electronics. Not vapor
locking either.
*******************************************

 

[AS]

Engine ground?
ECM grounds?
Are the supply voltages present when it cuts off?
Cold solder in the power semis inside the ECM?
Have you unplugged and plugged the ECM connectors?
Any rust in electronic components connectors?
Any chaffed wires?

Good luck!

 

[turkey]

Don't know anything about Justys, but on my 88 Buick, a similar
symptom ended up being the crank position sensor. The diifference was
that it occurred only if you stopped. Then you had to wait before it
would start. Hell getting gas.
On an even older vehicle, the pickup coil caused the van to stop, but
the wait time didn't seem to be as predictable.
Just shooting in the dark.