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#1
08-04-2012, 09:03 AM
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2002 grand prix wont pass the emisson
Im tryning go to get my grand prix to run its drive cycle for the egr value n evap systems i try every thing it wont complete its cycle i need just one to complete for i can pass this damn emssion test my check enging had came on i had it reset to just make sure the egr value was bad in had it was so i replace it n the light when out so i went to take the test again it fail beacus.it still had two montiners not ready everthing they told me i done it but it still not working i dont kno what to do now i dont have no touble codes at all could there be something else wrong????? Plz
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#2
08-05-2012, 10:34 AM
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Re: 2002 grand prix wont pass the emisson
The evap flag is usually the hardest to reset......
Check for codes and clear again...... Next day with the engine cold, start vehicle, and just let it idle to normal operating temperature.......Then, with temp 190-200, take vehicle out on the highway.......do several accelerations and decelerations, like 40-65, and 65-40.....cruise awhile....exit highway, come to a stop, then turn around and repeat on the way home.....usually works for me.....
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#3
08-05-2012, 10:45 AM
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Re: 2002 grand prix wont pass the emisson
Okay i will try i had another question do my thremosts have some thing do wit my egr value not complete its drive cycle
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#4
08-07-2012, 01:49 PM
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Re: 2002 grand prix wont pass the emisson
I've gotten the egr monitor to go to ok by doing some hard accelerations. Like cruising at 30 mph and punch it like your passing someone. So like Tech II said, get on the highway, wait 'till no one is behind you, slow down to 40, then punch it back up to 60. I've found that the evap one is best done by filling the tank and being patient while you drive it normally, to and from work. I'm having the problem now of getting my catalyst monitor to go to ok. I think this one may require an extended drive at cruising speed. Not sure.
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#5
08-07-2012, 03:11 PM
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Re: 2002 grand prix wont pass the emisson
Do a Google ''Grand prix drive cycle'' ,only do the part that's ''inc''
? City miles(35-45mph) + ?highway miles(55-65mph) = drive cycle The trick is to get it through the drive cycle ASAP with min gas & miles.
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