Question about 1989 Oldsmobile Eighty Eight Royale

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My car wont start. I have replaced the starter,and tested both the altenator and battery and still wont start please help.

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A car wont start if it doesn't have three main things #1. must have proper cranking amps and voltage (battery min. 12.5v, but should be 13v check with a digital voltmeter), cranking amps depends where you live: (Alaska or Arizona), you need more cold cranking amps in a colder climate. also very important.. all battery cable connections should be corrosion free and secured tightly.#2. fuel has to have proper clean fresh fuel, without moisture buildup and be the correct octane. Purchase some "Starter fluid" and have an assistant crank over the engine... if it starts, you have a fuel delivery problem. And If you use too high an octane you might have trouble with starting. Also you should have a new fuel filter every 30k , also check when you turn on your key to insure that you hear a humming sound coming from your fuel tank, this means that at least the fuel pump, the relay, and fuse are in working order, but doesn't necessarily mean that the pump is putting out the correct amount of fuel pressure, but if you hear a very loud humming noise we can assume that its probably in working order, next the car has to get an injector firing signal from your cars computer, it could be possible that the computer isn't commanding the injectors to fire,( very rare ), but is possible; or the injectors themselves have become clogged up..if so they will have to be serviced or replaced. #3. must have compression, as cars engines age, they tend to lose some compression, if you have two or more cylinders low on compression it would probably cause a starting problem, check your exhaust pipe, take your finger or use a white cloth and rub around the inside lip of the exhaust, is it wet/black? or dark goowy color?, well it Shouldnt be, this is a sign of possible worn piston rings.. if the color is light to dark brown then i would assume you have good compression. If the rings are worn then its also possible that the valve guides are also worn and when a car sits overnight the oil will drip past the valve guides and onto your spark plugs and foul them out, now take two different plugs out of your engine and perform another inspection, do they look wet and black? or just black? are the electrodes worn? do they need replacement? first thing i do when i have starting issues is replace plugs and wires, only if i havent changed them in awhile... and i clean the coils of corrosion and carbon tracking!! Just inspect the plugs, they never lie...if they dont look brown then put them down.
So if i was you, i would do the visual inspections first, because this could help narrow down the problem and save you a lot of troubleshooting hours.
If you found this helpful could you rate my answer,thanks

Posted on May 12, 2010

  • steve t May 12, 2010

    im sorry, i see that you replaced the starter, so i assume that your car doesn't crank over correct? You said it wont start. these are two very different symptoms. if it does nothing at all when you turn the key, you could have a defective neutral safety switch...but try and see if it will start in neutral position first, ....thats one problem, another is a defective starting switch, or it has a broken wire or a blown fuse going to the starter solenoid, check all the wiring to insure nothing broken.
    Now you can bypass all this and use a long screw driver with an insulated plastic tip and bypass the soleniod by shorting the battery cable (large post to the smaller wire post) on the solenoid if it turns then you know you've got a bad wire or bad ignition switch. i think they might even sell remote starter switches that you hook up one side to the battery and the other to the small wire on the starter solenoid and then safely push a button and it will crank the car...

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Good fun chasing this one down.... Died on the side of the road when my wife tried to lower the window. Would not restart. She could not raise the windows before she walked home. Car restarted 5hrs later, but died when my buddy hit the turn signal. Towed it home. Again no windows. Door locks would only unlock with the Ign. on, but worked normally ign. off. Window controls will only dim out the interior lights Ign. on or off. Seems like a bad ground. Oh yea No fuel PSI... and seat controls worked before the last restart, but dead now. Where the F is the ground for all these... Or is it the PCM? (black box behind the glove box?) I know it controls the door locks, but what else? Yea I need a service manual with a good wiring diagram. Any help would be great.

were yours the same if so can you please help me give me the steps that you took to fix your problem thanks or email at mcmath1234@gmail.com thankyou

Posted on Jul 04, 2011

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You checked the electronic system seems to be good.
now check the gas system. begining with the, gas pump, filter, carburator,
check that the carbutor inject gas

Posted on May 12, 2010

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