1986 760 Coil

[Centurion]

I replaced the ignition coil today in the ever on going saga of getting my 86 760 running - would a bad coil cause failure of the power stage? Back when I thought I had the problem originally solved it was by replacing the power stage, it ran perfectly for about 500 miles the problem resurfaced after that, and I again replaced the power stage but this time it didn't do the trick. When I replaced the coil today with a new bosche unit it helped immediately, it will run and idle without stahling, etc, but the same symptoms are in the background just not as pronounced. So did the old bad coil fry the power stages and does it have this latest one going out also? The power stages have all been used ones. Do I throw a new one on it and hope for the best?

I am going to post one of the initial posts below for reference:

My 86 760 GLE Turbo starts to miss, stall, etc once the engine is warmed up, it will usually get me home, but just barely(have had to have it towed from this issue).


It will do this even if you start it and let it warm up just sitting - after it reaches operating temp it will surge a couple times, shutter, miss and stall - starting up is usually not an issue, but I did have one time it wouldn''t.

I have replaced (mostly with used tested parts) the following:

Distributor
MAF
Power Stage
Injector resister pack
pre-heat hose

I have checked all the vacuum lines and wiring.

I thought I had the problem resolved after replacing the Ign. Pwr Stage - I ran the car on a long trip, much of which was mountainous twisty roads, I ran the car hard and it ran flawlessly, got 21 mpg and was a joy - I ran it around home for a couple weeks after the trip and then the problem started on the way home from a car cruise. I replaced the Ign Pwr Stage with another known good one, but the problem still exsists.


I don''t really want to keep throwing parts at it needlessly - what should my next step be.

If you have suggestions of parts to replace - please also tell me where they are located.

I enjoy this car SO much when it is running good - I want to be able to enjoy it without that twisted feeling in the gut every time I take it out.

What is/are my next step/steps?

[wojeepster]

check all your connections especially that little plastic connector on the distributor that is easily broken.