arc_55

hey guys, I have tuned this t2 engine very well but i am curious to know how i can fix my staged injection hesitation. I have it set for 3000rpm and i have a slight misfire/hesitaiton type feeling exactly at 3000 rpm. What screen can help me fix this issue. Should i raise the rpm point?

Thank you

Aaron Cake

iTrader: (1)

So what are your injector sizes?

PDF

Try lowering the stage rpm point 200rpm or so at a time until it gets better.

arc_55

1000cc all around , not needed i know. I will try lowering the rpm point and see if i can get it to go away. I will keep this post updated!

thank you

rx72c

iTrader: (8)

bring it down to 2500rpm and work on seeing if its a lean or rich misfire

Aaron Cake

iTrader: (1)

Seems to me that with 4 injectors of equal size, %Stage should be 50%.

arc_55

Yes the stage percentage is at 50%. I havent had an oppertunity to work with the stage rpm but i will very soon and keep you updated on the results.

thanks guys

bumpstart

leave stage at 50%
bring down the stage threshold to 2500 rpm and see if its worse ( i expect it is as i anticipate its already a rich crossing )

[ you err rich to prove the issue,, not lean ]

if it is worse you can move the stage threshold back to 3000 rpm and then try upping the other flag ( load ) which is factory set to -5 inch HG ( try 2 psi stage )
so that staging occurs at a higher engine load than before to use up the excess stage fuel

it may just be a matter of raising that load threshold,, or sometimes both that and the threshold RPM
( ie , 3500 and 2 psi stage requires much more fuel than the stumbling 3000 , -5 inch HG stage )

coreye1029

i have the same size injectors and im having the same problem. i know its the staging but my car is untuned, and nobody around here tunes micro. since yours is tuned, i was wondering if i could use your numbers to tune mine.