Can't seem to nail this problem
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Originally Posted by BillBoost37
FYI GM warranties a cat for about 100K miles. 
My 3 yr 30,000 was long gone and they still replaced the cat. When I asked they told me it was seperately warrantied to 100K.
My 3 yr 30,000 was long gone and they still replaced the cat. When I asked they told me it was seperately warrantied to 100K.
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From: Cincinnati, Ohio
Warranty for the CAT on a 2001 SSEi is 90K miles (which I am past).
The reason I have not replaced it yet is because a new CAT is $1,200 !!!!!!!!!
These GM CATs have platinum in them, which is why they cost so much. GM also tells its dealerships to save any old CATs they replace and send them to GM, so they can recycle the platinum.
After market CATs are cheaper, but they often will not work, since the specs for GMs CATs and backflow are so tight. Even with a new aftermarket CAT, the SES will come on and you will still get a code.
The reason I have not replaced it yet is because a new CAT is $1,200 !!!!!!!!!
These GM CATs have platinum in them, which is why they cost so much. GM also tells its dealerships to save any old CATs they replace and send them to GM, so they can recycle the platinum.
After market CATs are cheaper, but they often will not work, since the specs for GMs CATs and backflow are so tight. Even with a new aftermarket CAT, the SES will come on and you will still get a code.
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Have a chat with Rogue, He works for Intense, I think Rogue may be able to give you an idea of what cat you could use as a replacement.... $1200 is extreme for any Cat... There are a few that have worked around this problem, and A cat with the O2 bung for the sensor can be purchased... Ask around and you my recieve some good answers for the 2000+ crowd
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Thanks for the info on the CAT. I will check with Intense.
So, back to my problem. Any ideas what might be the cause of the lurching? Although the failed CAT could be a symptom, I am thinking that it is not the problem.
So, back to my problem. Any ideas what might be the cause of the lurching? Although the failed CAT could be a symptom, I am thinking that it is not the problem.
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From: Salina, KS
Originally Posted by jastek1
Thanks for the info on the CAT. I will check with Intense.
So, back to my problem. Any ideas what might be the cause of the lurching? Although the failed CAT could be a symptom, I am thinking that it is not the problem.
So, back to my problem. Any ideas what might be the cause of the lurching? Although the failed CAT could be a symptom, I am thinking that it is not the problem.
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At this point its very hard to say... Could be a transmission issue... But its too hard to speculate... There arer a few somewhere that have had simmilar issues as you have.. Not sure if they ever did get those problems corrected..
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Sounds kinda like my 2000 SSEI.
It only did it a few times now and then, at first around 40 mph but eventually up to like 65 or so, it would start studdering or lurching.
It then started doing it real bad all the time. (right after I kinda got onto the the gas pedal passin some slow traffic.)
My brother and I thought for sure it was something with the transmission because it only did it once it shifted past 2nd gear.
I took it in to the local tranny shop and he thought it needed a tune up. Replaced plugs, wires, fuel filter, coil pack, and even the TPS sensor. It helped but didn't remedy the problem.
So he checked it out some more and eventually figured out it was the tourqe converter. So that finally fixed the problem (a grand in parts and labor) :?
It only did it a few times now and then, at first around 40 mph but eventually up to like 65 or so, it would start studdering or lurching.
It then started doing it real bad all the time. (right after I kinda got onto the the gas pedal passin some slow traffic.)
My brother and I thought for sure it was something with the transmission because it only did it once it shifted past 2nd gear.
I took it in to the local tranny shop and he thought it needed a tune up. Replaced plugs, wires, fuel filter, coil pack, and even the TPS sensor. It helped but didn't remedy the problem.
So he checked it out some more and eventually figured out it was the tourqe converter. So that finally fixed the problem (a grand in parts and labor) :?
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From: Westerville, Ohio 2000 Black SSEi
A clogged cat could cause misfires which may explain the lurching. Usually a misfire that severe though will set a code. As stated above it may also be a torque converter or even the TCC solenoid sticking (locking unlocking when its not supposed too). Certain trans problems will set codes that do not light the SES light. You may want to have it scanned at a dealership (or anyone with a Tech II).
As for other cats, a lot of people have good luck with SLP HI-Flo cat or if you don't have emissions in your area you can go to a straight pipe and either use an 02 simulator or have the code programmed out of your PCM.
As for other cats, a lot of people have good luck with SLP HI-Flo cat or if you don't have emissions in your area you can go to a straight pipe and either use an 02 simulator or have the code programmed out of your PCM.
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I can't go with a straight pipe because my area has an E-Check. They do a code scan and a tail pipe sniff, so there is no way around it. Luckily, I have a whole year before my license plates renew. Besides, I'm a fan of clean air and want to do my part and all.
All of that said, I am not sure the Cat is the problem. The SES light even goes out sometimes for a day or 2, which tells me that it might not be bad enough to be causing the problem.
Could this be related to the coils? Last night I pulled the coil packs and wire brished the top and bottom connections and put dielectric grease on them. Today I have not gotten any lurching, but the day is not over. It also stopped for a few days when I changed the plugs and wires.
Before I have tranny looked at and pay for a new Cat, I want to make sure I have ruled out other causes.
All of that said, I am not sure the Cat is the problem. The SES light even goes out sometimes for a day or 2, which tells me that it might not be bad enough to be causing the problem.
Could this be related to the coils? Last night I pulled the coil packs and wire brished the top and bottom connections and put dielectric grease on them. Today I have not gotten any lurching, but the day is not over. It also stopped for a few days when I changed the plugs and wires.
Before I have tranny looked at and pay for a new Cat, I want to make sure I have ruled out other causes.
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