Skip the auto shop - Our mechanics make house calls

Q: Cherry red catalytic converter.

asked by on

Truck lacks power, and exhaust manifold on driver side gets completely red, just timed with timing gun, new wires and plugs, thinking it could be fuel regulator?? It has no catylac converter cut out due to being stopped up just trying not to burn it to the ground. Or 02 sensors ca uses it to do that?

My car has 240000 miles.
My car has an automatic transmission.

Hi there. Usually, oxygen sensors do not cause this problem, but if the oxygen sensor itself is causing the truck to run lean, then that could cause this issue.

If the oxygen sensor is bad, the Check Engine light would come on because of it. GM has a common problem with the fuel pumps going bad or not putting out the proper fuel pressure, causing a lean condition in the fuel system that makes the exhaust glow red.

Sometimes, the fuel pressure regulator can cause problems as well and it is a cheaper fix than a fuel pump. You can start with changing the fuel pressure regulator and seeing if that fixes the issue. From my experience, the fuel pump is the cause of this problem and needs to be replaced.

If you need assistance, get a certified technician, such as one from YourMechanic, to replace the oxygen sensor, the fuel pressure regulator, or the fuel pump for you.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: As my car warms up it starts to make a knocking noise. Then stalls when I stop.

Hello. Unfortunately these are typically signs of a more serious issue. Your engine may have thrown a rod. Which means the connecting rod that hold the piston in place has broken off. The only repair is to rebuild or replace...

Q: I have a 1992 Chevy Silverado 1500 that won't go into gear but the clutch pedal is hard and it still want go into gear when runnin

You should first pump the clutch several times and then hold it down and release air from slave cylinder. Retry the clutch to see if clutch releases. If not then turn off vehicle and put transmission in gear and hold...

Q: What will I need to change my fpr on my 96 Chevy Silverado 5.7 liter? I appreciate any advice and understand if you don't want to

It takes a mechanic about 2 hours. The main thing you have to keep in mind is gasoline is flammable and the vapors can accumulate and explode. You have to be mindful of even your shop light, and static electricity,...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...