olsd tuning maxed ve table
olsd tuning maxed ve table so i just got my car running and i get the idle dialed in at 14.7afr. but soon as i touch the gas spike like and stumbles. i have a afr error histogram made and keeps saying it wants more fuel and i max it out at 445. so i check intake bolts and tb for a vacuum leak and i got nothing. so i keep adding fuel and still lean need help
added scan at bottom
added scan at bottom
Last edited by erskine; Jul 19, 2014 at 11:52 AM.
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Stop trying to compensate fueling with the tune. There seems to be something seriously wrong with the tune OR there is a mechanical issue. From LS1 stock/cammed/bolt on heads -> LS3 cammed, there is not nearly as much change from my stock LS1 tune in most settings. Ie, changes in timing, VE etc are actually not far from each other or just shifted into different RPM ranges due to cam characteristics.
Do some logging, post the tune and log here so we can give you some input on what may be happening.
Do some logging, post the tune and log here so we can give you some input on what may be happening.
so i just got my car running and i get the idle dialed in at 14.7afr. but soon as i touch the gas spike like and stumbles. i have a afr error histogram made and keeps saying it wants more fuel and i max it out at 445. so i check intake bolts and tb for a vacuum leak and i got nothing. so i keep adding fuel and still lean need help
Unfortunately that's all I can suggest with the details you give in your post.
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Your injector flow rate & offset tables are set up for a returnless fuel system. If your pressure regulator is vacuum referenced, then the offset & flow rates should be the same at all manifold vacuum.
Also your stoich is still at 14.68, should be around 9.75
Russ Kemp
Also your stoich is still at 14.68, should be around 9.75
Russ Kemp
Histogram shows that at 1000 rpm it is flowing 1.0-1.04 g/cyl of air. You have something seriously wrong with your air model. I haven't had time to look at the tune but something has to be seriously whacked.
Are you sure the wideband meter is not having a problem?
I have had the LM-1 act normal at first and then sort of
"lock up lean" some time into the session, when the LSU4
sensor was on its way out.
Chasing bad data will seldom give a good result.
I have had the LM-1 act normal at first and then sort of
"lock up lean" some time into the session, when the LSU4
sensor was on its way out.
Chasing bad data will seldom give a good result.