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Old 05-22-2013, 08:26 PM   #1
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Question Running out of time PLEASE HELP!!!

It won't pass emission because it's only reading 40% of the computer they said. I took it twice and both times they said to drive it for a week or so. It expires this month and that was the extension date. I have a 2005 Sport with a 3.5 lift and 33s. I also recently replaced the battery, but it was back in February of this year. My mechanic said that we might have to replace the main CPU, but before I do that PLEASE HELP!!! let me know... thanks in advance

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Old 05-22-2013, 08:32 PM   #2
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Leave battery disconnected overnight.

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Old 05-22-2013, 08:46 PM   #3
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How much has it been driven since replacing the battery? Sometimes it takes longer but there usually 50-100 miles is enough to gather info
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Old 05-22-2013, 09:03 PM   #4
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Had to put about 150 miles on a ford we have for the cpu to relearn after replacing battery. Be sure you drive a lot of stop and go and some freeway.
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Old 05-22-2013, 09:29 PM   #5
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Also forgot to include it in my previous post that th CPU will often reset depending on warm up cycles regardless of distance travelled. I believe it is usually 40 cycles for our tjs
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Old 05-23-2013, 05:19 AM   #6
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I have driven it for more than a thousand mile at least, with both stop & go and freeways. I will try to leave the battery unplugged overnight. Anymore helpful info would be appreciated, thanks...
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Old 05-23-2013, 05:42 AM   #7
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The OBD II Drive Cycle/Monitors have not run to completion, By disconecting the battery you will erase any that have already ran & the entire process will have to run to completion sometimes certian drive cycles will not complete for various reasons (engine not to operating temp,Fuel Level too low,etc) Try & follow this drive cycle http://www.obd2.com/support/reprog/d..._procedure.pdf
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Old 05-23-2013, 08:21 AM   #8
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Quote:
Originally Posted by gmiller0737 View Post
The OBD II Drive Cycle/Monitors have not run to completion, By disconecting the battery you will erase any that have already ran & the entire process will have to run to completion sometimes certian drive cycles will not complete for various reasons (engine not to operating temp,Fuel Level too low,etc) Try & follow this drive cycle http://www.obd2.com/support/reprog/d..._procedure.pdf
Thanks I will try these
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Old 05-25-2013, 12:06 PM   #9
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I still have no luck with all of the suggestions. Anymore would be greatly appreciated. Thanks...

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