exhaust manifolds glowing

Asked by 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

4 Answers

17,320

Clogged catalytic converter.

217,175

or leaky fuel injector dumping raw fuel into the exhaust.

43,015

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.

83,265

I worked on a lot of motor homes in my days and everything one would come with glowing manifolds we always found an exhaust restriction somewhere in the system and usually it was in the mufflers, you could actually see a hot spot on the outside of the mufflers. So that's my two cents worth.

Your Answer

Add photo

Related Questions

Sierra C/K 2500

Looking for a Used Sierra C/K 2500 in your area?

CarGurus has 3 nationwide Sierra C/K 2500 listings and the tools to find you a great deal.

ZIP:

Search GMC Sierra C/K 2500 Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

GMC Sierra C/K 2500 Experts

#1 rrussellus
rrussellus
Reputation 20
#2 mastermaniam
mastermaniam
Reputation 10
#2 mrmoony
mrmoony
Reputation 10
View All

Related Models For Sale

Used GMC Sierra 2500
186 listings starting at $6,497
Used GMC Sierra 1500
990 Great Deals out of 59,989 listings starting at $1,299
Used Ford F-250 Super Duty
440 Great Deals out of 42,944 listings starting at $2,195
Used Chevrolet Silverado 1500
2,581 Great Deals out of 151,313 listings starting at $1,500
Used Chevrolet C/K 2500
254 listings starting at $2,995