09-08-2008, 12:38 AM
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#21
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Moderator
Join Date: Nov 2004
Location: Long Grove, IL
Posts: 5,002
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Are you sure the suspected faulty converters are "OBD II Certified" ? I know I made sure the one I picked up for C2's car was..
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Cliff Scott
2004 Alero GX w/sport pkg - Sold, living somewhere in WI now.
2011 Saab 9-5 Turbo4 M6
2004 Corvette Convertible M6
1994 Chevy Beretta - Quad4/M5
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09-08-2008, 01:02 PM
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#22
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Aleromod part owner
Join Date: Nov 2003
Location: Far Northeast Philadelphia, PA
Posts: 18,199
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The high flow cats or ANYTHING that isn't GM will bring on the SES light for a 420 code.
The only 2 fixes are, the stock GM cat, or a O2 sim. O2 sims are around $50 and althought a bit tight to get your hand up there with the car on the ground it can be done.
Unplug the O2 sensor, cut the wire tie though the plug hook first, plug in the O2 sim.
On the ground it had the be done by feel. Go up from the driver's side of the car and be sure the car's exhaust is cold. You'll be right up on the pipe.
On a lift, 5 mintues, on the ground about 45 but I was a noob when I did it. Be careful your hand doesn't get stuck between the engine and firewall.
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33% ALEROMOD OWNER!!
2000 Olds Alero 3400 SFI 14.53 @ 94.93
1985 Olds Delta 88 307 SBO 17.96 @ 76.99
2007 Volvo V50 T5 6M 15.782 @ 89.12
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09-08-2008, 01:17 PM
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#23
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GL Member
Join Date: Jul 2008
Location: Butler, PA
Posts: 633
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This is rather easy, cut off your cat, cut it open, romove the guts. Weld in a straight pipe, and get your PCM flashed with a downstream O2 sensor delete. No more codes, still pass inspection, and you're good to go. I've done it before and it's worth the little extra time.
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*TOTALED* - 2000 Olds Alero Sedan - 3.4L 3400 V6 - WAI - Sony Head Unit -
NEW RIDE - 2005 Buick LaCrosse - 3.8L 3800 Series III V6 - WAI - Muffler/Resonator removed -
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09-08-2008, 01:39 PM
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#24
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V.I.P. Member
Join Date: Dec 2003
Location: Wausau, Wisconsin
Posts: 918
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Are you running headers ?
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09-09-2008, 04:49 PM
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#25
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GX Member
Join Date: Jun 2008
Location: Scottsdale, AZ
Posts: 6
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Bam
Bam! Thats your problem its the high-flow cat... our damn 3400 engines are REALLY picky about their equipment. You need an OEM Cat because we have this stupid ODBII system with the 2 oxygen sensors
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09-09-2008, 07:37 PM
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#26
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GLS member
Join Date: Jan 2008
Location: -
Posts: 1,206
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^lol, good summary ^
I'd go with the HP Tuners with the delete, ultimately cheaper and u can still run the highflow Cat.
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09-10-2008, 03:43 PM
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#27
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GLS member
Join Date: Feb 2004
Location: MARYLAND
Posts: 4,018
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sigh god damn it people
first i had straight pipe, 420 code comes up, finally get a magnaflow high flow cat had for over a year no problem
second the 420 code comes back, got another magnaflow
third the 420 code comes back, decide to go with a Catco cat not rated as a high flow
fourth the 420 code comes back infared temp scan the cat, replaced it with another catco
now then, light is on again, i could of sworn i already said this but I HAVE HAD A O2 SIMULATOR BEFORE AND EVREYTIME I PLUG IT IN I GET "BANK 1 TOO LEAN"
so i refuse to use it, no im not going with a OEM cat from the stealership for god knows what outrageous amount of money, there are countless people on this board who have a cat no where near a OEM spec/rate
im blaming seafoam, every bit of the way im blaming seafoam, it all makes sense now all those months where the car was fine and then i sea foam it and like a week or 2 later hello SES light......never using seafoam again i gaurentee its seafoam
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AUTOBOT
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09-10-2008, 04:00 PM
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#28
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Keepin it Real
Join Date: Nov 2003
Location: Alexandria, VA
Posts: 12,522
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maybe it was seafoam that caused it?
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2015 Audi SQ5
2000 Alero GLS Coupe - still in the family, but I don't drive it anymore
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09-10-2008, 04:02 PM
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#29
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GLS member
Join Date: Feb 2004
Location: MARYLAND
Posts: 4,018
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AUTOBOT
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09-10-2008, 04:08 PM
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#30
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Keepin it Real
Join Date: Nov 2003
Location: Alexandria, VA
Posts: 12,522
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well maybe i can make it all better for you lol pm you in a minute...
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2015 Audi SQ5
2000 Alero GLS Coupe - still in the family, but I don't drive it anymore
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09-10-2008, 04:33 PM
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#31
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Aleromod part owner
Join Date: Nov 2003
Location: Far Northeast Philadelphia, PA
Posts: 18,199
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Yeah I said something, but now, nevermind
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33% ALEROMOD OWNER!!
2000 Olds Alero 3400 SFI 14.53 @ 94.93
1985 Olds Delta 88 307 SBO 17.96 @ 76.99
2007 Volvo V50 T5 6M 15.782 @ 89.12
www.facebook.com/kb0177
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09-10-2008, 06:28 PM
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#32
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GLS member
Join Date: Feb 2004
Location: MARYLAND
Posts: 4,018
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oh jeez
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AUTOBOT
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09-10-2008, 06:31 PM
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#33
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636 whp
Join Date: Aug 2006
Location: AZ
Posts: 11,876
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I said it already but... it's just a light. If it's not affecting performance, who cares?
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09-10-2008, 06:32 PM
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#34
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on vacation
Join Date: Aug 2006
Location: that way
Posts: 2,169
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I cant even count how many cans of seafoam ive stuffed through my throttle body.. ive never had an SES light before- lol
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WILL NEVER FORGET
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09-10-2008, 06:43 PM
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#35
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GLS member
Join Date: Jul 2008
Location: Tampa Bay, Fl
Posts: 1,127
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actually.. when i punched out my car.. on the outside.. it looked like it was heating up.. i did have a 420 code.. but when i pulled all the crap outta the cat.. it didn't really look like it was clogged.. but who knows....i am gonna go and try the magnaflow OBD II high flow
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2001 Oldsmobile Alero GL Sedan LA1 3400 SFI V6
Nickname : Midnyte
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09-10-2008, 06:58 PM
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#36
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GLS member
Join Date: Feb 2004
Location: MARYLAND
Posts: 4,018
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Quote:
Originally Posted by [ion] C2
I said it already but... it's just a light. If it's not affecting performance, who cares?
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well personal prefernce i mean i dont like driving around with any idiot lights, and i mean if you have a current SES light on and then something else goes wrong by chance, its just gonna flash and beep, and i guess if you love seeing that SES light on you can be like "cool please stay there"
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AUTOBOT
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09-10-2008, 07:07 PM
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#37
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Aleromod part owner
Join Date: Nov 2003
Location: Far Northeast Philadelphia, PA
Posts: 18,199
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^^ ummmmm OK
I would only want the light to go away due to the inspection factor, automatic fail
__________________
33% ALEROMOD OWNER!!
2000 Olds Alero 3400 SFI 14.53 @ 94.93
1985 Olds Delta 88 307 SBO 17.96 @ 76.99
2007 Volvo V50 T5 6M 15.782 @ 89.12
www.facebook.com/kb0177
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09-10-2008, 07:18 PM
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#38
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GLS member
Join Date: Feb 2004
Location: MARYLAND
Posts: 4,018
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personally i wouldnt want the light on period, ever to be honest...
but i mean if you have a problem with your car and want to get by in life by periodically hiding your SES light i mean go for it...
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AUTOBOT
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09-10-2008, 07:33 PM
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#39
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636 whp
Join Date: Aug 2006
Location: AZ
Posts: 11,876
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HPTuners, disable the kitty code. It's a phenominal program..
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