Chevy Blazer ignition problem.

First the stats: 91 Chev. S-10 Blazer, 4x4, 4.3L engine, automatic, loaded
up with every whiz-bang known to autodom... Over 200K miles on it.

Was driving around town, everything was fine. I was stopped at a red light
for maybe 20 seconds and the engine cut out for less than a second, ran for
another second and then stopped and would not re-start. A quick check under
the hood didn't seem to reveal much. My first suspicion was the fuel pump,
so I pulled the top off the air cleaner and looked down what passes for a
carburator (two barrels, two injectors) and they didn't seem to be squirting
any fuel when the engine was cranked over.

(Obviously, when you break down in the middle of an intersection, you soon
acquire lots of "help...")

I had it pulled home.

I first tried pouring a little gas down it to see if it would fire. It
didn't.

Next, suspecting it may have slipped time (I've lost three engines that
way...) I put the timing light on it. The timing light didn't trigger. I
put a little "el cheapo" spark tester on it. It didn't flash (I tried it on
my pickup and it works fine...). Pulled the distributor cap and, yes, the
rotor turns when you crank it.

Have both the Haynes and Chiltons manuals. Interestingly, one says that the
pickup coil in the distributor should read infinite resistance to ground
while the other says it should NOT (caps theirs...) read infinite to ground.
Went through the other checks the two manuals suggested.

Finally, I bit the bullet and concluded the only thing common to both the
ignition and injectors was the engine control computer, so I bit the bullet
and replaced it. Nada...

I don't have the means to read out the codes from the computer. When I
bought the vehicle (from a close friend... I've "known" the vehicle for
about 10 years....) and we took it for a smog check to transfer the title,
it was running rough and, of course, wouldn't pass. They tried reading the
codes and told us that the readout connector was not working. (After two
hours of flailing, they found one sparkplug wire had come off...). So, I
didn't think finding a code reader would be all that helpful. I hope the
new computer fixes that...

Anyhow, this is where I'm at. Sorry for kind of a long post, but I figured
the more information I provided, the better chance I'd have of someone
spotting something that I didn't. I don't want to just keep throwing parts
at it until something fixes it.

Thanks in advance for any help anyone can give me.

Jerry

More than likely the problem is in the distributor module or pick up, scan
the engine and see if you have a cranking rpm reading. Also check the pcm
fuses. post back
"Jerry Foster" > wrote in message
.. .
> First the stats: 91 Chev. S-10 Blazer, 4x4, 4.3L engine, automatic,
> loaded
> up with every whiz-bang known to autodom... Over 200K miles on it.
>
> Was driving around town, everything was fine. I was stopped at a red
> light
> for maybe 20 seconds and the engine cut out for less than a second, ran
> for
> another second and then stopped and would not re-start. A quick check
> under
> the hood didn't seem to reveal much. My first suspicion was the fuel
> pump,
> so I pulled the top off the air cleaner and looked down what passes for a
> carburator (two barrels, two injectors) and they didn't seem to be
> squirting
> any fuel when the engine was cranked over.
>
> (Obviously, when you break down in the middle of an intersection, you soon
> acquire lots of "help...")
>
> I had it pulled home.
>
> I first tried pouring a little gas down it to see if it would fire. It
> didn't.
>
> Next, suspecting it may have slipped time (I've lost three engines that
> way...) I put the timing light on it. The timing light didn't trigger. I
> put a little "el cheapo" spark tester on it. It didn't flash (I tried it
> on
> my pickup and it works fine...). Pulled the distributor cap and, yes, the
> rotor turns when you crank it.
>
> Have both the Haynes and Chiltons manuals. Interestingly, one says that
> the
> pickup coil in the distributor should read infinite resistance to ground
> while the other says it should NOT (caps theirs...) read infinite to
> ground.
> Went through the other checks the two manuals suggested.
>
> Finally, I bit the bullet and concluded the only thing common to both the
> ignition and injectors was the engine control computer, so I bit the
> bullet
> and replaced it. Nada...
>
> I don't have the means to read out the codes from the computer. When I
> bought the vehicle (from a close friend... I've "known" the vehicle for
> about 10 years....) and we took it for a smog check to transfer the title,
> it was running rough and, of course, wouldn't pass. They tried reading
> the
> codes and told us that the readout connector was not working. (After two
> hours of flailing, they found one sparkplug wire had come off...). So, I
> didn't think finding a code reader would be all that helpful. I hope the
> new computer fixes that...
>
> Anyhow, this is where I'm at. Sorry for kind of a long post, but I
> figured
> the more information I provided, the better chance I'd have of someone
> spotting something that I didn't. I don't want to just keep throwing
> parts
> at it until something fixes it.
>
> Thanks in advance for any help anyone can give me.
>
> Jerry
>
>



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Did you check for spark from the coil and the distributor tower?
If you have no spark to engine , but spark to distributor then it could
be a bad rotor, replace cap also if rotor bad.