Failed Emissions - Help Please !
11-17-2010, 03:41 PM
#1
3rd Gear Member
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Join Date: Dec 2006
Location: Georgia
Posts: 595
Failed Emissions - Help Please !
Took the car today for emissions (all obd2 port, no sniff in exhaust) and it failed the 1st time for "READINESS". This was with a VMP 93 tune for cold air, gears, and cmdp. I wasn't surprised so...
I went home and installed the Bama 93 race tune that was on it last year for the same mods - it PASSED last Novemeber. Well it failed again today for "READINESS". I talked to a well known local shop here and they thought since I just flashed it that it hasn't gone through enough ignition cycles...drive, cool down, drive, cool down, etc. hence readiness issue.
Is this the case? Does anyone know how many ignition cycles I'll have to go through and if this will eventually pass the "READINESS" issue?
I went home and installed the Bama 93 race tune that was on it last year for the same mods - it PASSED last Novemeber. Well it failed again today for "READINESS". I talked to a well known local shop here and they thought since I just flashed it that it hasn't gone through enough ignition cycles...drive, cool down, drive, cool down, etc. hence readiness issue.
Is this the case? Does anyone know how many ignition cycles I'll have to go through and if this will eventually pass the "READINESS" issue?
11-17-2010, 03:50 PM
#2
3rd Gear Member
Join Date: Oct 2006
Location: St Louis, MO
Posts: 962
When mine failed, I loaded up the emissions tune from Brenspeed the next morning before work. Drove to work then afterwards I drove back to the shop and passed. 80 miles total. I think its a mileage thing, not on/off cycles. My car was only turned on/off probably 3 times.
11-17-2010, 04:00 PM
#3
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Join Date: Dec 2006
Location: Georgia
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When mine failed, I loaded up the emissions tune from Brenspeed the next morning before work. Drove to work then afterwards I drove back to the shop and passed. 80 miles total. I think its a mileage thing, not on/off cycles. My car was only turned on/off probably 3 times.
11-17-2010, 04:04 PM
#4
Gentleman's Relish
Join Date: Feb 2005
Location: AZ
Posts: 13,090
It's not the number of miles you drive or just the number of times you start the car. It's whether or not certain driving conditionsare met that allows all of the sensors to go through their required checks.
If you drive about 15 minutes around town. Turn the car off and let it cool down for a few hours then drive it on the freeway for about 15 minutes you should be fine. Some sensors do require additional igntion cycles to be "ready".
THere's info in most repair manuals about how to complete a "Sensor Readiness Drive Cycle" or somethign along those lines. The Owners manual may even have it. It's a lot of steps but if you think about it, under normal driving conditions you do most if not all of them.
P.S. if your tune shuts off the rear O2 sensors you may never be "ready" because the OBDII never receives confirmation from the sensor its gone through its check.
If you drive about 15 minutes around town. Turn the car off and let it cool down for a few hours then drive it on the freeway for about 15 minutes you should be fine. Some sensors do require additional igntion cycles to be "ready".
THere's info in most repair manuals about how to complete a "Sensor Readiness Drive Cycle" or somethign along those lines. The Owners manual may even have it. It's a lot of steps but if you think about it, under normal driving conditions you do most if not all of them.
P.S. if your tune shuts off the rear O2 sensors you may never be "ready" because the OBDII never receives confirmation from the sensor its gone through its check.
11-17-2010, 04:22 PM
#5
3rd Gear Member
Thread Starter
Join Date: Dec 2006
Location: Georgia
Posts: 595
It's not the number of miles you drive or just the number of times you start the car. It's whether or not certain driving conditionsare met that allows all of the sensors to go through their required checks.
If you drive about 15 minutes around town. Turn the car off and let it cool down for a few hours then drive it on the freeway for about 15 minutes you should be fine. Some sensors do require additional igntion cycles to be "ready".
THere's info in most repair manuals about how to complete a "Sensor Readiness Drive Cycle" or somethign along those lines. The Owners manual may even have it. It's a lot of steps but if you think about it, under normal driving conditions you do most if not all of them.
P.S. if your tune shuts off the rear O2 sensors you may never be "ready" because the OBDII never receives confirmation from the sensor its gone through its check.
If you drive about 15 minutes around town. Turn the car off and let it cool down for a few hours then drive it on the freeway for about 15 minutes you should be fine. Some sensors do require additional igntion cycles to be "ready".
THere's info in most repair manuals about how to complete a "Sensor Readiness Drive Cycle" or somethign along those lines. The Owners manual may even have it. It's a lot of steps but if you think about it, under normal driving conditions you do most if not all of them.
P.S. if your tune shuts off the rear O2 sensors you may never be "ready" because the OBDII never receives confirmation from the sensor its gone through its check.
11-17-2010, 04:49 PM
#6
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11-17-2010, 05:21 PM
#7
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Join Date: Dec 2006
Location: Georgia
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