'98 Blazer won't start - eats ignition modules

I have a '98 Blazer with the 4.3L engine. For about 1 year it has been running very rough, especially when it is damp outside and it has sat overnight. It usually will run well after about 30 minutes or so.

It has also gotten so bad on 3 occassions that it won't start at all (cranks but won't fire). If the ignition module is replaced, it will then start. Something appears to be taking out the ignition module.

I have replaced virtually (if not all) every ignition component within the last 6 months, including plugs, wires, cap, rotor, module, coil and even the TPS.

It is now dead again, and this time after a shop replaced the module. It is interesting to note that the mechanic said the base timing was way too high as well.

Any suggestions are very welcome, as this is getting pretty bad.

The truck has 104K on the clock.

Thanks,

Jeff

Reply to
VDeuce
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Are you Jump starting other Vehicles with this Truck?

Is it a Snow plow Truck?

VDeuce wrote:

Reply to
somebody

That eliminates High Current thru the alternator

>
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somebody

Reply to
Shep

And clean the distributor mounting surface before applying the fresh grease and mounting the module. Whitelightning

Reply to
Whitelightning

======= ======= You stated you replaced the coil.

Did you replace the pick-up coil?

A bad pickup "can" make the module go out.

~:~ MarshMonster ~:~

Reply to
Marsh Monster

Make sure you use Delco parts. Aftermarket parts are often marginal in quality.

Randy

Reply to
R. O'Brian

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