89' olds 98 touring. runs good, but manifold starts to glow red.

Marialyce · #1 02-14-2011, 10:21 PM

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.

eric_454 · #2 02-15-2011, 12:50 PM

I once had a Pontiac Fiero with similar symptoms and it was the intake gasket leaking air. My $0.02 worth.

Marialyce · #3 02-15-2011, 01:43 PM

Thanks. I let my hubby know.

Jrs3800 · #4 05-17-2011, 06:21 PM

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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