Pontiac Repair: 1992 Bonniville SSEI, pontiac bonniville, crank sensor

Question
1992 Pontiac Bonniville 3800 V6 SUPERCHARGED.PROBLEM= TIMING OR ELECTRICL.Problem started while driving it would miss ever so often.Problem grew to, now car will not idle @temperature, you need the rpm up above 2500 just to keep running.Car is not drivable and been to 2-dealerships & 2-well recommended techcians.3 out of the 4 were useless=wasted money. Parts I already replaced= map sensor,cam positioning sensor,crank sensor/timing sensor hub,crank balancer,o2 sensor,egr valve,throttle sensor,plugs,plug wires,coil towers,spark modular board,vacuum lines,going to replace the intake gaskets this weekend.Just about every thing my father inlaw=(good mechanic)& I could think of. stuck alot of money into the car and about ready to give up. If you need more info than this please e-mail.
I NEED HELP.
Could the problem be the super charger,It ran low on supercharge oil, did fill it after I found out it suppose to have oil in the gearcase.Not sure if I damaged it.

Answer
Hey Corey:

Well it can be a lot of things but I would srat by looking for a vacuum leak either between the lower intake manifold and super charger or there is a vacuum hose that runs from the front of the intake along the back of the intake to the map sensor(s). The gaskets leak right under the supercharger nose. and the vacuum hose is right under the nose of the super charger as well. Running it low on oil will only damage the super charger the engine will still run the charger may be noisey. HAs the car been scanned for nay trouble codes? that would be where I would start is it set any codes. being that this is an OBD 1 engine it really has to run bad or have a hard failure to set any codes. if you have access to a actual scan tool and not just a code reader look at fuel trim rates when it's hot running in the fule trim is low under 110 or shows - % the engine is running rich my guess it the trim #'s are high like 150 and shows + % then there is a vacuum leak somewhere or you have a lean injector(S). alos take a look at the IAC counts hot with the a/c off on that car the Iac should be around 30 counts or so if it below say 20 counts that to would indicate a vacuum leak issue. last thing to try is to take out the MAF sensor and clean it. there is a product made my CRC that's called MAF sensor cleaner or you can try a radio tuner cleaner or any kind of a electrical contact cleaner THAT DOESN'T leave any kind of residue when it dries. that is where I would start looking.
Good luck :)