- Joined
- Dec 7, 2010
- Posts
- 24,569
- Reaction score
- 5,931
- Location
- Southeast PA
- First Name
- Paw Paw
- Truck Year
- 2007
- Truck Model
- Chevrolet Tahoe LT
- Engine Size
- 5.3, 4WD
What are symptoms of a failed/clogged Catalytic Converter?
What are syptoms of a failed/clogged Cat?
- Thread starter 89Suburban
- Start date
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
crazy4offroad
Equal Opportunity Destroyer
- Joined
- Jul 30, 2010
- Posts
- 8,468
- Reaction score
- 1,070
- Location
- West BY-GOD Virginia
- First Name
- Curt
- Truck Year
- 1979
- Truck Model
- K-10
- Engine Size
- 350/SM465/NP205
Smell.
Idles good & smooth but loss of power throughout powerband without any real "miss".
Carboned up plugs.
Idles good & smooth but loss of power throughout powerband without any real "miss".
Carboned up plugs.
- Joined
- Dec 7, 2010
- Posts
- 24,569
- Reaction score
- 5,931
- Location
- Southeast PA
- First Name
- Paw Paw
- Truck Year
- 2007
- Truck Model
- Chevrolet Tahoe LT
- Engine Size
- 5.3, 4WD
How about engine temp heating up at higher rpms under heavy acceleration? That could be a lean issue too right?
Jims86
Full Access Member
- Joined
- Aug 3, 2010
- Posts
- 5,492
- Reaction score
- 133
- Location
- Patterson,Ca
- First Name
- Jim
- Truck Year
- 1986
- Truck Model
- K10 Suburban Silverado
- Engine Size
- 5.7 TBI
coughing up hairballs, un able to **** for long periods of time.....oh, wait a minute......
oneluckypops
Full Access Member
- Joined
- Feb 6, 2011
- Posts
- 2,210
- Reaction score
- 90
- Location
- Sedalia, Mo.
- First Name
- Luke
- Truck Year
- 85
- Truck Model
- K30 SRW
- Engine Size
- 5.7 Fuel injected Vortec/ 4L80E
^^^^^^^^^This plus^^^^^^^^^^^^^^
Excessive Exhaust temperatures
Rotten egg smell
Transmission doesn't want to shift out of second gear
Poor Exhaust flow out of the tailpipe.
When under a load converter can be red hot.
In theory the engine temperature could run warmer then normal, because the hot exhaust doesn't escape the tailpipe and back flows to the engine. But the engine cooling system may very well disguise this.
- Joined
- Aug 3, 2010
- Posts
- 29,207
- Reaction score
- 24,340
- Location
- Usually not in Ohio
- First Name
- Andy
- Truck Year
- '77, '78, '79, '84, '88
- Truck Model
- K5 thru K30
- Engine Size
- 350-454
All of those symptoms still aren't a sure sign, just a good indicator. I once watched a guy replace a perfectly good cat (still looked new) because the car lacked power and the cat would glow red. I later found the TPS to be incorrectly installed. Well, I found many other things wrong, but the TPS was the big culprit.
Similar threads
