90 Olds 98 Engine dies.

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JeffD - 20 Dec 2004 14:41 GMT

I recently replaced the Ignition Module and Coil Pack on my Olds 98, 3.8l
V6. The car starts fine when the engine is cold and will run for a while.
It seems that after it get warm it just quits. If it sets for a few
minutes it will start then quits again after a few minutes. I am not sure
if it could be the crank or the cam sensors. It acts as if the key was
turned off.

Any help?
Jeff

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Silver Surfer - 20 Dec 2004 15:06 GMT

Did the vehicle act this way before you changed the module and coils?

>I recently replaced the Ignition Module and Coil Pack on my Olds 98, 3.8l
> V6. The car starts fine when the engine is cold and will run for a while.
[quoted text clipped - 5 lines]
> Any help?
> Jeff

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JeffD - 20 Dec 2004 15:56 GMT

In a way. I replaced the module and coils for 2 reasons. First the epoxy
in the module was oozing out. Second the car would start and run fine but
when you killed the motor you would have to wait at least an hour before
the engine would start.

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Silver Surfer - 20 Dec 2004 23:39 GMT

This makes me wonder if the intake air temperature sensor might be giving
the computer some bad info when it warms up (assuming your machine has one
of these). Other possibilities include the engine (coolant) temperature
sensor and the O2 sensor.

> In a way. I replaced the module and coils for 2 reasons. First the epoxy
> in the module was oozing out. Second the car would start and run fine but
> when you killed the motor you would have to wait at least an hour before
> the engine would start.

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JeffD - 21 Dec 2004 14:07 GMT

The "Service Engine" light has remained on before and after the module and
coil pack were replaced. I retrieved the codes last night and got the
following; 41 and 42. This is leading me to believe that I may also have
to replace the Crank Position Sensor and the Cam Position Sensor.

I am going to make sure my ground wires and module base are grounded
properly before I replace both sensors.

There is still a possibility that I may have to replace the timing chain
and gears in the near future.

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AshTray700 - 22 Dec 2004 19:29 GMT

i had an 87 olds 98 with similar codes and it needed a crank sensor. it had
the exact same symptoms as u describe and the service engine light had been
on for a while before it started dying on me. is it the 3800 motor? its
been a long time but i think it was a crank sensor but coulda been a cam
sensor as well and i think the engine code was in the 40's as i can
remember, i dont have my guide anymore for odb I codes what was the
description listed for 41 and 42?

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