I know it's wrong but...
October 7th, 2010, 10:57 PM
#21
CF Veteran
OK here is the deal, i recently purchased a 99 K1500 burb used off craigslist.
Today during lunch I get a service engine soon light and stopped into autozone. codes show that the Catalytic converters are shot.
It has always idled a little rough so that might be caused by a plugged cat right?
long story short, i'm broke and have no real recourse besides idle threats.
"Since i'm not sure of the legality here, lets just call this a theoretical discussion"
Can I GUT the catalytic converter? Remove it, stab a pipe through it and re-attach? will this mess with the O2 sensors? Will the SES light go off after a while of driving it gutted? any other thoughts for a really cheap way of getting past this? Will it pass inspection in New York after gutting?
I have a cheap-o HF welder so welding is not a problem
Thanks
Today during lunch I get a service engine soon light and stopped into autozone. codes show that the Catalytic converters are shot.
It has always idled a little rough so that might be caused by a plugged cat right?
long story short, i'm broke and have no real recourse besides idle threats.
"Since i'm not sure of the legality here, lets just call this a theoretical discussion"
Can I GUT the catalytic converter? Remove it, stab a pipe through it and re-attach? will this mess with the O2 sensors? Will the SES light go off after a while of driving it gutted? any other thoughts for a really cheap way of getting past this? Will it pass inspection in New York after gutting?
I have a cheap-o HF welder so welding is not a problem
Thanks
And the rough idling could be a lot of things, poor fuel/clogged filter/weak pump, bad coil/bad, wrong, old, contaminated plugs/wires, vacuum leak, water in the chamber, etc.
October 7th, 2010, 11:02 PM
#22
CF Veteran
OK, i dug out the printout that autozone gave me.
Definition
Catalyst efficiency low-bank 2
Explanation
The oxygen sensor monitors the Catalytic converters ability to store oxygen
Probable causes
1. Catalytic converter defective (failure possibly due to #2,3, or 4)
2. Engine misfire or running condition
3. Large vacuum leak
4. Engine oil leakage into exhaust-valve guide seals, piston rings
i'm pretty sure it's not #2 since there have been no misfires and it runs fine.
How would I check for #3? are there other things that would have problem with a vacuum leak?
How would I check for #4?
Thanks
Definition
Catalyst efficiency low-bank 2
Explanation
The oxygen sensor monitors the Catalytic converters ability to store oxygen
Probable causes
1. Catalytic converter defective (failure possibly due to #2,3, or 4)
2. Engine misfire or running condition
3. Large vacuum leak
4. Engine oil leakage into exhaust-valve guide seals, piston rings
i'm pretty sure it's not #2 since there have been no misfires and it runs fine.
How would I check for #3? are there other things that would have problem with a vacuum leak?
How would I check for #4?
Thanks
4. blue smoke in the exhaust.
Doesnt sound like a bad cat to me. It sounds like your rough idle is giving the O2 sensor a bad read. You need to find out why you have a rough idle. Vacuum leak or misfire is the direction you need to go in.
October 8th, 2010, 6:25 AM
#23
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How hard is it to replace vacuum lines? should I just get a roll of Vacuum line and just replace every line I can find since I'll be inspecting them all anyway?
on a side note, The SES light turned off 2 days ago and hasn't been on since... weird.
It finally stopped raining so I should be able to actually do something this weekend.
on a side note, The SES light turned off 2 days ago and hasn't been on since... weird.
It finally stopped raining so I should be able to actually do something this weekend.
October 8th, 2010, 9:27 AM
#24
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yes you are correct, air is less dense the higher you go, im sorry, so i guess that just means that you might have another indication, if its running lean then then the computer thinks your at a higher elevation, if its running rich then it thinks your at a lower elevation, i know this was a factor for me and i was running extremely rich, and i live in louisiana and we are way below sea level
yes i supposed sometimes ill have a wire or two loose in my brain, thanks for the correction
yes i supposed sometimes ill have a wire or two loose in my brain, thanks for the correction
October 8th, 2010, 9:31 AM
#25
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i would do a complete check on your vacuum lines before you consider just replacing them all because it might not even be a vacuum broblem, it might be just a small replacable section or it could just be a piece of the hose coming disconnected
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