GM 2.8 V6 vs 2.0 4 banger,witch one is more reliable ??

[Shawn Cake]

Will Honea wrote:
> 
> OK, I've got an '86 Cimmeron with the 2.8 v-6.  Mechanically, it has been great - 140k miles, still has
> good compression, nice even idle, reasonably nimble considering.  Tranny was gone thru (replaced the
> lock-up switch - PITA!) and everything looked just fine - shop manager's comment was that it was
> probably good for another 100k or so (grain of salt there).  Injectors are clean, fuel system checks good and
> NO LEAKS!  I've got one huge problem with it that I hope someone can help with:
> 
> It EATS ignition modules.  I've used everything from the dealer's Delco to NAPA to AutoZone/Checker
> (never will use another Wells part!).  Computer dump shows no faults.  Anybody got a clue as to what might
> cause this?  Replaced coil, position sensor, pickup coil, wires, just about everything.  I'm real happy with
> the engine, but this is about to drive me nuts!
> 
> Will Honea
> whonea at codenet.net


Put an oscilloscope on the power supply leads to the ognition module.
If you see some spikes or extreme levels of RFI .... there is your
problem.