Maybe a dumb question but.....
04-18-2006, 11:48 AM
#21
Originally Posted by Bad30th
Do you still have your air pump installed/enabled ?
That will cause it to read lean on the wideband until it turns off, as it's pumping air into the exhaust at startup.
Otherwise OLFA table accompanied by startup enrichment tables control A/F at startup (prior to falling into closed loop).
Rob (Bad30th)
That will cause it to read lean on the wideband until it turns off, as it's pumping air into the exhaust at startup.
Otherwise OLFA table accompanied by startup enrichment tables control A/F at startup (prior to falling into closed loop).
Rob (Bad30th)
04-18-2006, 11:53 AM
#22
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Originally Posted by 99whitews6
Not installed anymore and I swear I turned it off but thats a good idea. I will check the tune when I get home! Maybe a just disabled the code.
(Nothing there to physically blow air into the exhaust to lean the A/F out...). I don't think turning the code on/off would change the startup A/F...
Rob (Bad30th)
04-18-2006, 12:31 PM
#24
TECH Fanatic
I dont know why you would want to change from stock unless you are having problems or want less fuel consumption.
I pulled 25% fueling out of mine and it still starts fine.
Ill keep taking more out once I get my cam and heads in until it starts crap. No point tipping fuel in if it does nothing other than empty the tank.
I pulled 25% fueling out of mine and it still starts fine.
Ill keep taking more out once I get my cam and heads in until it starts crap. No point tipping fuel in if it does nothing other than empty the tank.
04-18-2006, 12:40 PM
#25
Originally Posted by ringram
I dont know why you would want to change from stock unless you are having problems or want less fuel consumption.
I pulled 25% fueling out of mine and it still starts fine.
Ill keep taking more out once I get my cam and heads in until it starts crap. No point tipping fuel in if it does nothing other than empty the tank.
I pulled 25% fueling out of mine and it still starts fine.
Ill keep taking more out once I get my cam and heads in until it starts crap. No point tipping fuel in if it does nothing other than empty the tank.
04-18-2006, 12:48 PM
#26
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Personally I think your issue may be more timing and raf than anything. I just provided answers for this thread. Those tutorials are guidlines and arent written in stone. Understanding what the car wants and how it behaves to the changes you make will take you further than them writeups.
04-18-2006, 01:08 PM
#27
Originally Posted by HumpinSS
Personally I think your issue may be more timing and raf than anything. I just provided answers for this thread. Those tutorials are guidlines and arent written in stone. Understanding what the car wants and how it behaves to the changes you make will take you further than them writeups.
04-18-2006, 04:13 PM
#30
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Advancing your spark at idle will make it even leaner, so don't be surprised.
After-start enrichment is there to handle the incomplete burn resulting from the cold chambers and plugs that lasts for several seconds after a start.
This isn't the same as fuel compensation for a cold engine which absorbs heat at a much faster rate from both the charge and the burn.
It's unfortunate that the two functions have been confused here.
After-start enrichment is there to handle the incomplete burn resulting from the cold chambers and plugs that lasts for several seconds after a start.
This isn't the same as fuel compensation for a cold engine which absorbs heat at a much faster rate from both the charge and the burn.
It's unfortunate that the two functions have been confused here.
04-18-2006, 04:32 PM
#31
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Hmmm I can say I aint the brightest but "After start" and "Enrichment" to me means fuel that is added after the vehicle has started and since it is indexed by ECT why wouldnt this table be used to compensate for a cold engine ie operate like a choke.
What do you think you are acheiving by adding the extra fuel in the OLFA table as opposed to the Afterstart enrichement table?
Also the car with a big cam is gonna need more timing form the start. If he hasnt messed with it I am assuming its a stock table and can take a little timing to help smooth things out. Stock timing is anywhere from 22-24* and this isnt enough forthe cubes and cam he is running.
Leaner because of more of a complete burn (meaning less wasted gas, better heat production and a smoother running vehicle) or because of less fuel?
What do you think you are acheiving by adding the extra fuel in the OLFA table as opposed to the Afterstart enrichement table?
Also the car with a big cam is gonna need more timing form the start. If he hasnt messed with it I am assuming its a stock table and can take a little timing to help smooth things out. Stock timing is anywhere from 22-24* and this isnt enough forthe cubes and cam he is running.
Leaner because of more of a complete burn (meaning less wasted gas, better heat production and a smoother running vehicle) or because of less fuel?
