1986 Volvo 760 GLE Turbo Running issue

[Centurion]

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]

did you use thermal paste on the ignition module?

did you check the plastic connector on the distrubutor that leads to the hall pickup (these break very easily) or alternatively if you do not have hall pickup did you check the wiring going to the speed sensor on the bellhousing this wiring degrades and renders the speed sensor faulty.

check, clean, and retighten all grounds.