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Microtech staged injection misfire/small hesitation

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Microtech staged injection misfire/small hesitation

Old 07-27-10, 08:21 PM
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staged injection misfire/small hesitation

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
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Old 07-28-10, 09:05 AM
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So what are your injector sizes?
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Old 07-28-10, 09:12 PM
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Try lowering the stage rpm point 200rpm or so at a time until it gets better.
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Old 07-29-10, 06:06 AM
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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
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Old 07-30-10, 02:19 AM
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bring it down to 2500rpm and work on seeing if its a lean or rich misfire
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Old 07-31-10, 10:23 AM
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Seems to me that with 4 injectors of equal size, %Stage should be 50%.
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Old 07-31-10, 12:03 PM
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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
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Old 08-01-10, 09:22 PM
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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 )
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Old 07-25-12, 05:38 PM
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VA question to arc

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.
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