It happens but is rare. The cats are only a few inches from the rear two cylinders on each side. When the cracks happen the tune is off which inturn causes the cats to fail. The cats will break apart, distort and flake and when you kill the engine that split second of valve overlap causes a vacuum which can pull those tiny sand size particles back into the engine. Most will loose compression in the rear two cylinders. I talk to a lot of guys with the manifold issue and average 5-6 guys a year with engine failure from this. All the manifolds crack in the same spot no matter what year model. If you want to fix it for good look into my Stage 1 package.
Throwing Codes for CatConverters
Ill start by saying that I'm not very knowledgeable about vehicles, but have two close friends who are and will be able to assist me through the process.
I bought a 2004 crew cab with just under 200k miles last week. Seller informed that there was a o2 sensor code see.
Checked it today, and it comes back with both bays cat converter. Here we go. Read most every thread on the subject and contacted u/ nightowl about the cajun resonated b pipes. No emissions where I live.
My dad (20 year mechanic) and mechanically inclined friends are flabbergasted that a cat failure could kill the engine as suggested in multiple threads. Any info on this?
From what I've read, the cause is likely a crack in the exhaust manifold.
It doesn't sound like there's an exhaust leak, but I'm getting the codes no less.
Potentially 2 o2 sensors and the seller wasn't lying? Seems unlikely.
I've put approximately 300 miles on it, speeds up to 90 with no issues, though it does seem to have a small hesitation before accelerating at full throttle, but it's hard for me to estimate any loss of power on a new to me vehicle.
Thoughts on danger w/ driving it? They are encouraging me to drive it regardless as it just got inspected last week w/ the light on... good old boy shop didn't even run it.
"What's wrong with it besides the light being on and fuel economy?"
Thank you all for this great forum. Love the titan. I fully expect to drop the some on the headers and b pipe, just need to justify it to my friends who will be doing the work for a case of beer.
I bought a 2004 crew cab with just under 200k miles last week. Seller informed that there was a o2 sensor code see.
Checked it today, and it comes back with both bays cat converter. Here we go. Read most every thread on the subject and contacted u/ nightowl about the cajun resonated b pipes. No emissions where I live.
My dad (20 year mechanic) and mechanically inclined friends are flabbergasted that a cat failure could kill the engine as suggested in multiple threads. Any info on this?
From what I've read, the cause is likely a crack in the exhaust manifold.
It doesn't sound like there's an exhaust leak, but I'm getting the codes no less.
Potentially 2 o2 sensors and the seller wasn't lying? Seems unlikely.
I've put approximately 300 miles on it, speeds up to 90 with no issues, though it does seem to have a small hesitation before accelerating at full throttle, but it's hard for me to estimate any loss of power on a new to me vehicle.
Thoughts on danger w/ driving it? They are encouraging me to drive it regardless as it just got inspected last week w/ the light on... good old boy shop didn't even run it.
"What's wrong with it besides the light being on and fuel economy?"
Thank you all for this great forum. Love the titan. I fully expect to drop the some on the headers and b pipe, just need to justify it to my friends who will be doing the work for a case of beer.
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The cats will clog completely leaving you not able to rev past 2800rpms or nothing at all.
We have the FIX for this issue and the cheapest as well. Hundreds of Stage 1 kits sold and hundreds of reviews on this forum as well as the sister forum Club Armada. Look us up and give me a call.I have a 2004 Titan also with the same problem (2 cats and 2 O2 sensors bad) and was just quoted $4500 for the fix thru the dealership for parts! I'm following this thread to see the outcome...sucks without my truck!
1 - 3 of 9 Posts
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