Question about 1989 Oldsmobile Ninety Eight

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89 oldsmobile 98 won't start

Done changed coil pack and crank sensor put in new spark plugs and wires still will not start replaced starter as well it's a 89 ninety eight regency fe3 My 89 oldsmobile 98 is having starting problems. CAA checked out battery and it was fine as well as the starter. The CAA guy said he thinks it has something to do with Gas. Any Ideas?? I only have a 500 dollar budget to fix this car:(

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If you suspect its a fuel problem best to do a fuel pressure test, you can rent a tester at auto zone and do it yourself. They also can show you how to use it and what pressure it should be. Also if you turn the key to on position you should hear a hum from the gas tank and then a click that is the pump running and the click is the relay, if you don't then the pump isent running, also chk. the fuse and relay, it could be as simple as a blowen fuse or a bad relay.

Posted on May 26, 2009

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I chased this same issue with my 89 olds cutlass supreme started out with feul pump,sending unit and filter. That helped but still had issue then did air check valve, and throttle position sensor it helped a little more with runability but still had irregular starting so tested and replaced feul regulater oh boy that helped more yet didnt take care of issue. So beings the car ran great when it ran why do the injectors right. So i went after plugs and coilpacks and ignition modual lol boy this car runs good but still have starting issue lol so i took it to a garage for there input they told me ijectors and ECM was bad, boy so i did injectors and pc myself and bam car starts great on demand and when i want it to start. If you do the work your self but dont have the money for all kinds of parts call around for a diagnostic only cost for me was $30.00 and parts were under $300.00 injectors and ECM. All the other parts came up to almost $700.00. So if you got a budget to work with and want to get striaght to the issue have a garage with diagnostic eq. tell you what is wrong with it. They dont mind not doing the repair. Its still work for them just to do diagnostics. Good luck on your repair

Posted on Mar 31, 2012

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Your fuel pressure will leak down 1psi per every five minutes if it leaks down afaster tthan that then you have a problem if it has 40 psi while trying to start and when running that is what you need it will leak down overnight these cars are bad to have faulty ignition modules that makes the car try to run out of time.

Posted on Apr 30, 2010

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Just checked on a new fuel pump and it says it is 40psi. But we ran a test at the fuel rail and it waw 40psi with just the key to on. At the time it wouldn't start.

(It only starts... quickly, in morning or when sitting for hours. But, not always. Sometimes it is irregular.)

Someone told me that the 40psi needs to be constant... but, that isn't the case as the following day the fuel filter line had ZERO psi.

So check on how many checks to fine the proper psi. Found one site that said check fuel pressue on the rail after taking out relay... i think it is 2nd down on right column behind glove box. Then use jumper wire to bypass relay.

Then do another test... etc.

So find out proper testing for this car.

Also, need to check fuel pressure regulator.

good luck.

Posted on Jan 06, 2010

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Get like 45 dollas to get an alternater from the junk hard

Posted on Jul 23, 2009

  • both4ever Sep 20, 2010

    my father inlaw had the same problem until one of the mechanics found the problem was the plate thats under the coilpack that was it they told his that piece has a sensor that sends the signal so he got a newone and bam no problem started right up
    hope this helps

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