exhaust manifolds glowing

Asked by Chad Jan 21, 2016 at 01:04 AM about the 1998 GMC Sierra C/K 2500

Question type: Maintenance & Repair

I have a 98 GMC Sierra 3 quarter ton 4
wheel drive 5.7 Vortec new fuel pump spark
plugs and  wires distributor cap. exhaust
manifolds glowing any ideas

3 Answers
223,755

Rowefast answered 8 years ago

I'll go with the plugged catalytic converter, It would have to be a lean condition and running hard for fuel to make the manifold glow. Too much fuel would make it bog down.

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