what would cause the exzaust manifolds to glow bright red its got a 454 in it with throttle body fuel injection

Asked by hellraser6662012 May 07, 2014 at 11:21 PM about the 1991 Chevrolet C/K 3500 Extended Cab LB 4WD

Question type: Maintenance & Repair

the truck does not have converters on it and it has a y pipe with single outlet also
dont know if it matters but the truck is an ex emergency vechile

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