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?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Cherry red catalytic converter.

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: jerking when you get up past 45mph and is shutting off

Hello. If the engine is misfiring and shutting off at this speed, then that can be caused by a number of issues. Most of the time, this is caused by a failing distributor. These are a common problems on this...

Q: Hi! What can cause the engine to shut off occasionally when shifting from reverse to drive in an automatic transmission? This has

Hello, thank you for writing in. There are several things you can check, luckily if you are mechanically inclined at all you can check quite a few at home. To begin, make sure your idle air control valve and throttle...

Q: 5.7l cuts out when you throttle the engine from a stop. Gets going sometime then hesitates. When it gets to 50 mph it runs fine.

Hi there. Check the IAC (idle air control valve) and see if its functioning. If the engine is having an issue with stumbling, the IAC could be causing the engine to stall out. If the IAC is working properly, then...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.