!!!!!!please someone help with my car!!!!!!!!?

alright,1993 oldsmobile cutlass SUPREME 3.1...the car has no patterns really but when driving it (when it wants) the rpms lets say will be at 3 grand and it will start bouncing below like its tring to stall but not at high rpms,give it some gas and it'll stop for a second then start again it will do it at low rpms too.and lately it has wanted to stall out at a stop,but not all the time,i have changed the fuel filter,spark plugs and wires,and and oil change...My car was throwing a code for o2 sensor,egr valve,iac...so i took the egr valve and cleaned it inside and out it was pretty bad,noticed that going into the plentum that the hole was almost closed shut with carbon so i decided to take the plentum off and clean all of it inside,put it back on and cleared the memory.and dumped as instructed some sea foam in the booster and the tank, the car seems to run alot smoother and the codes are not signaling anything,drove it around and it started doing it again just not as bad,but runs smoother.My mechanic says that he thinks it is the module,maybe a coil pack.can anyone tell me what their opinions are.if it is one of the two which 1 would be most likely the culprit,and or how do i check to see,cause if its not acting up seems that you couldn't check it.i have a voltage meter,i am going to check the plugs and wires in the morning to see if the egr and intake made the plugs foul out...sorry for such a long story but figured if i told all then it could eliminate any question..thanx in advance!!!!!!please someone help with my car!!!!!!!!?I would agree it's the ignitor module or coil primaries and/or circuits. This is why it effects your tacho.



I've even known faulty tachos back feed into a primary circuit to cause a misfire.!!!!!!please someone help with my car!!!!!!!!?I'd check your plugs and engine wires first. Check your hosing to make sure there are no holes anywhere. Whats the battery like? I can't help you too much with modules. Could be a radiator issue? What have you done with that?!!!!!!please someone help with my car!!!!!!!!?sounds like a faulty mass air flow sensor so the ecu is not able to give the right amount of fuel through the injectors or a faulty throttle position switch!!!!!!please someone help with my car!!!!!!!!?Check the throttle position sensor.!!!!!!please someone help with my car!!!!!!!!?Your fuel Pump is going. Sometimes they go all at once, sometimes it takes a while especially if you use gas tretment. Will eat electric fuel pumps up.