Question about 1998 Oldsmobile 88
The first thing to do is change the spark plugs, it's inexpensive and may solve your problem. If that's not it it could be 100 other things. You''ll need to have someone troubleshoot it.
Posted on Oct 11, 2013
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Posted on Jan 02, 2017
check your plenum its probably your problem. Its the plastic intake on top of the motor. This part over heats causing holes in it near the egr which causes antifreeze to pour into your exhaust and making it look like you blew a head gasket, and also allows your spark plugs get wet causing the miss fire. To check take the throttle body off and see if there is antifreeze sitting on top off the motor you'll need a flash light. I had the same problem You can check out info on the internet about this famous problem gm had. If you know how to work on cars its easy to do it yourself. The part cost about 200 or more
Posted on Feb 22, 2010
if your ecu is faulty a code will be thrown aka check engine light come one other than that there is no way to test a ecu its just a prosses of elimination
i hope it helps
Posted on May 09, 2011
Tips for a great answer:
May 09, 2011 | 1999 Oldsmobile 88
Please see my tip at http://www.fixya.com/cars/r6715318-causes_gasoline_engine_misfires . These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.
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