Engine stalling - need help

I have a 1985 Pontiac Fiero 2.8l V6. Completely restored including rebuilt
engine - stock.

Just recently the car started stalling while driving it. It seems to
happen only while the engine is hot and never at an idle. I can make it
happen consistently by warming up the engine, then rev the engine to about
2500 RPM and wait about 1-2 mins. The tach then drops instantly to 0 RPM.
When this happens while driving, sometimes the engine will start again on
it's own.. sometimes I need to throw in the clutch and shut off the key,
and restart the engine. Any ideas?

blackcherryfiero wrote:
>
> I have a 1985 Pontiac Fiero 2.8l V6. Completely restored including rebuilt
> engine - stock.
>
> Just recently the car started stalling while driving it. It seems to
> happen only while the engine is hot and never at an idle. I can make it
> happen consistently by warming up the engine, then rev the engine to about
> 2500 RPM and wait about 1-2 mins. The tach then drops instantly to 0 RPM.
> When this happens while driving, sometimes the engine will start again on
> it's own.. sometimes I need to throw in the clutch and shut off the key,
> and restart the engine. Any ideas?

Does it ever, while cranking, show the tach on zero while
the engine is cranking but not starting? If so, it's a bad
module, pickup, or coil. Have you checked to see if there
are any stored codes?

JazzMan
--
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Please reply to jsavage"at"airmail.net.
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"Rats and roaches live by competition under the laws of
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I found that corrosion at the screw that holds the ignition module would cause this problem.

Even if it is all new, the screw might be loose. It forms the ground path.
It's probably time for me to check this again.

My V6 would drop dead on the highway, then restart with no problem on the side of the road.

Other than that, you are probably looking for an electrical connection that goes open when
it gets hot and serves the entire iginition system - module, coil, wire from the coil to
the distributor, any connection. Maybe a bad temp signal to the ECM? I don't know if the
ECM shuts off spark when too hot.

It's tough to diagnose until it really croaks.

Dave S.

JazzMan wrote:
>
> blackcherryfiero wrote:
> >
> > I have a 1985 Pontiac Fiero 2.8l V6. Completely restored including rebuilt
> > engine - stock.
> >
> > Just recently the car started stalling while driving it. It seems to
> > happen only while the engine is hot and never at an idle. I can make it
> > happen consistently by warming up the engine, then rev the engine to about
> > 2500 RPM and wait about 1-2 mins. The tach then drops instantly to 0 RPM.
> > When this happens while driving, sometimes the engine will start again on
> > it's own.. sometimes I need to throw in the clutch and shut off the key,
> > and restart the engine. Any ideas?
>
> Does it ever, while cranking, show the tach on zero while
> the engine is cranking but not starting? If so, it's a bad
> module, pickup, or coil. Have you checked to see if there
> are any stored codes?
>
> JazzMan
> --
> ************************************************** ********
> Please reply to jsavage"at"airmail.net.
> Curse those darned bulk e-mailers!
> ************************************************** ********
> "Rats and roaches live by competition under the laws of
> supply and demand. It is the privilege of human beings to
> live under the laws of justice and mercy." - Wendell Berry
> ************************************************** ********