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Old 02-14-2011, 09:21 PM   #1
Marialyce
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89' olds 98 touring. runs good, but manifold starts to glow red.

We just got this car to use on a mail route. Replaced catalytic converter, o2 sensor, wires and plugs are good. It runs good, but , the longer it runs the manifold starts to glow red. What would cause this. The car has sat for a while. Could the muffler be plugged? Thanks for any help.
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Old 02-15-2011, 11:50 AM   #2
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Re: 89' olds 98 touring. runs good, but manifold starts to glow red.

I once had a Pontiac Fiero with similar symptoms and it was the intake gasket leaking air. My $0.02 worth.
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Old 02-15-2011, 12:43 PM   #3
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Re: 89' olds 98 touring. runs good, but manifold starts to glow red.

Thanks. I let my hubby know.
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Old 05-17-2011, 05:21 PM   #4
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Re: 89' olds 98 touring. runs good, but manifold starts to glow red.

Sounds like a lean condition... what type of O2 did you use? As well has the SES light been on at all?
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