A lean fuel mixture can cause the exhaust headers to glow red hot because the fuel is not burning completely. This can happen for a number of reasons, such as a clogged fuel injector, a dirty air filter, or a vacuum leak.
Timing Issues
Incorrect timing can also cause the exhaust headers to glow red hot. If the timing is too advanced, the fuel will ignite too early and cause the cylinder pressure to increase dramatically. This can lead to overheating and damage to the exhaust headers.
Exhaust Leaks
Exhaust leaks can also cause the exhaust headers to glow red hot. If there is a leak in the exhaust system, the hot exhaust gases will escape and come into contact with the headers. This can cause the headers to overheat and glow red hot.
Catalytic Converter Issues
A clogged or damaged catalytic converter can also cause the exhaust headers to glow red hot. The catalytic converter is responsible for converting harmful pollutants into less harmful substances. If the catalytic converter is not working properly, the exhaust gases will be hotter than normal and can cause the exhaust headers to glow red hot.
Low Coolant Level
Low coolant level can also cause the engine to overheat, and in turn that leads to red hot exhaust headers.
