Question about 1987 Oldsmobile Delta 88

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I'm having a problem with my 87 Old Delta 88 Royale misfiring and smelling of gas. My son-in-law changed the plugs and wires. They also put a new oxygen sensor on it. Does it take two sensors or one? This one was up by the motor some where. I just don't know what the problem is. The sensor helped some, but I still have the problem.

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The oxygen sensor just reports back to the computer if the fuel mixture is too rich or too lean so the COMPUTER can control the fuel flow.

You are sending raw fel into your converter that is overhating trying to treat that much unburned fuel. Don't do this for long or you will ruin the converter.

I'm not familiar with your ignition system, but that is where the problem is. It may be the distributor cap that has a carbon track (looks like a crack) in it. Or, it could be a coil that's bad if you have a separate coil for each spark plug.
Try removing 1 plug wire at a time to see if the misfire is the same or worse. If the ame, that is the problem area. Don't do this with the engine running unles you hae special unsulated plug wire puller or you will get a good shock.

Posted on Mar 03, 2009

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