Hard to crank and bogs out around 5000 rpm it runs when it idles then when accelerate it stalls
Doesn't sound like an Idle problem to me. Sounds more like a timing issue,probably has some slack in the timing chain based on its age so even with new plugs it needs a timing adjustment.
SOURCE: My idle is running as high as 3000 rpm while
It could also be carbon build up on the throttle body, but regardless the cure is the same. Your going to need to clean the throttle body and the idle air control valve (IAC). With a can of throttle body cleaner, (follow instruction on the can) clean the throttle body blade and the IAC passage way in the throttle body. Once the throttle body is cleaned, with the engine off, turn the ignition key to the on position (engine not running) and wait for 30 seconds and then turn if off for 10 seconds and then start it. This should reset the IAC, if it did not work do it again and see if it helps. If not clean out the IAC passage way again. The turning on and off the ignition reset's the IAC and it may still be stuck with carbon build up. Once the engine has started, Note there will be lots of smoke form the tail pipe, that's normal. It's just the left over throttle body cleaner and carbon being burn off, take's not more then 10 min to burn off. Good luck and this should keep you from replacing the IAC. Oh and don't use Carb cleaner, Carb cleaner is to corrosive to the throttle body gasket.
SOURCE: REMOVE AIR BAG FROM DASHBOARD IN 99 OLDS DELTA 88 ROYALE
Only a owner, or somebody who worked on an olds can give a full answer. Well, in London I don't see many Oldsmobile.
I hope to help by posting a link to Haynes Haynes on haynes manual for your model you should find the whole illustrated procedure for fitting the airbag.
SOURCE: Car started bogging and dying
COIL PACTS GOING BAD OR LOCKOUT ON TRANSMISSION DISCONNECT IT AND SEE IF IT HELPS
SOURCE: 1983 Delta 88: how much MPG does a 1982 Oldsmobile delta 88 royal...
Personal experience between 13 - 20 for most models with the v-6 and v-8. the 5.7l is about the most fuel efficient at roughly 17
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