Afr fluctuations with olsd

[johnj]

here you go i started it waited for the idle to stabilize and then blipped the throttle. 5 min idle.efi

[statesman]

Is your fuel pressure manifold referenced?

[johnj]

Yes its factory truck rails with the vacuum line hooked up still


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[statesman]

Your Injector Flow Rate table {B4001} is wrong. With vacuum referenced fuel pressure, this table should be flat (same value in all cells). I would also zero out all values in Small Pulse Adjust {B4005}.

Fix these tables and then retune your VE table.

[johnj]

Your Injector Flow Rate table {B4001} is wrong. With vacuum referenced fuel pressure, this table should be flat (same value in all cells). I would also zero out all values in Small Pulse Adjust {B4005}.

Well i fixed these tables and readjusted the ve and it is still doing it. No matter what changes i make it will always eventually start out at my desired or a little leaner and then as it gets warm the afr starts dropping. Is there a table i can change to keep it from adding fuel with temperature. I have tried completely zeroing out the temp blend tables and that had no effect on the way it got richer as it got up to temp. Ive never seen an injector go rich with heat normally they go lean so i dont think its an injector issue. I am seriously at whits end on this damn thing and now its starting to get towards putting it up for the winter. Haha will it ever end. Thanks for all your help so far guys i really appreciate it.

[statesman]

Is there a table i can change to keep it from adding fuel with temperature.

Yes, but you have to work backwards... in other words, you need to add more fuel when cold and then reduce the amount of added fuel as it warms up. You do this in table {A0008}. You'll then need to tune your VE to the new fueling.

[johnj]

So basically that would be the same issue i am having now just backwards so its not worth messing with that. Any other thoughts?


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[statesman]

No, if done correctly it will cancel out the issue you're having now.

[johnj]

Ok i will give it a shot thank you very much.


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[statesman]

Do you understand how it works?

If you're fueling is at 14.7 cold and makes its way to 12.2 warm, then you want to increase your fueling so you start off at 12.2 cold and stay there as it warms up. You then redo your VE table to 14.7 and you'll then have 14.7 from cold to warm.