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I noticed in my datalogs that once the car is warmed up the charcoal cannister is active if I am at any throttle position above idle. and the open percentage increases in direct proportion to the throttle. and while it is open the BLM goes extremely rich. I tried disconnecting it electrically and from the engine vacuum and it still messes with the BLM. Does the computer adjust to compensate for the valve being open and if the valve never really opens shows up as running rich? does the computer also look for a certain output in the engine while the valve is open and if it doesn't see the output then it holds the valve open longer to try and compensate? I drove the car about 17 miles @ 60-65 and it was showing a percentage open the whole time. I think I have a bad purge solenoid that is not opening. Am I on the right track? is there anything else that can cause this?
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White '89 Beretta GTU with a 3400 under the hood. only a tranzgenic CAI so far! -
I was told to send the return line to the engine bay, not the motor for tuning. Its supposed to throw it off a little, not like you are saying. Id say something else is wrong but for now, delete it completely and see what happens. Ive never had an issue with the cannister connected. Are you sure it doesn't open once its closed loop as well? Im not that familiar with its operation parameters.Ben
60DegreeV6.com
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I had it disconnected from the engine vacuum and unplugged electrically and it was still affecting the BLM, like the computer was compensating for it being open and going rich. It only opens once the car goes closed loop and is warmed up then it is open nearly all the time I am pushing the throttle.Originally posted by SappySE107 View PostWhite '89 Beretta GTU with a 3400 under the hood. only a tranzgenic CAI so far!Comment
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Are you sure it not just needing less fuel than its programmed for?Ben
60DegreeV6.com
WOT-Tech.comComment
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If the cannister opens when its closed loop and you are giving it throttle, of course its going to do that every time. I would try tuning the fuel tables.Ben
60DegreeV6.com
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I know the tables need work but I believe the cannister is bad. There is 12v to the plug with the key on and with or without power there is airflow thru the valve on the cannister. I will verify this with a new cannister tomorrow. What I need to know is if the plug is a sensing system for the computer or a control circuit. if it was a sensing circuit wouldn't it be 5V?Last edited by scrappy; 05-02-2007, 01:00 PM.White '89 Beretta GTU with a 3400 under the hood. only a tranzgenic CAI so far!Comment
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I believe the cannister is bad, there is 12v to the plug with the key on and with or without power there is airflow thru the valve on the cannister. I will verify this with a new cannister tomorrow. What I need to know is if the plug is a sensing system for the computer or a control circuit. if it was a sensing circuit wouldn't it be 5V?White '89 Beretta GTU with a 3400 under the hood. only a tranzgenic CAI so far!Comment
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you have all the stuff to tune?
id disable it in code and see what happensComment
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A new cannister and valve didn't fix it, it helped some though. I do have the stuff to tune and have been doing it but I don't have anything for the charcoal cannister in my .XDF that I am aware of. any ideas how to find it and turn it off?Originally posted by sil View PostWhite '89 Beretta GTU with a 3400 under the hood. only a tranzgenic CAI so far!Comment
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