Injector duty cycle drop out, can see in AFR too, help

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Injector duty cycle drop out, can see in AFR too, help

Postby Jamie S » Sat Apr 16, 2011 10:34 pm

Hi all,

I have a data log from the drag strip. I see a goofy drop out in my injector signal. The scary thing is, I can see the AFR return a lean spike so its real but why. This is not good at all, I need to get knock set up to see if it would retard. I have v3.57 MS2 extra 2.0.1 (i know its old) running 95lb/hr injectors on the fly back. Also what it Bit 8, it flashes yes some times in the data log. Scared to throttle my car but its soo fun its hard not to.

Any ideas? Thanks!
cordova 16psi_83ar_turbine_2010-10-08_19.08.33.msl
2.4L 99 turbo cavalier fully supported MS2, 419hp, 70mph tire fire.
Jamie S
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Re: Injector duty cycle drop out, can see in AFR too, help

Postby elaw » Sun Apr 17, 2011 7:32 am

It's really hard to tell anything without an .msq file - we have no way of knowing what your settings are!

But here's something to check: go into acceleration wizard and look at "decel fuel amount". If it's not 100, try setting it to 100 and see if that helps.
Eric Law
1990 Audi 80 Quattro with AAN turbo engine: happily running on MS3+MS3X
1997 Saab 9000 Aero: self-tweaked stock engine management (and stock engine)
1986 Audi 4000 Quattro: R.I.P.

Be alert! America needs more lerts.
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Re: Injector duty cycle drop out, can see in AFR too, help

Postby Jamie S » Sun Apr 17, 2011 3:09 pm

sorry and thank you . here is the msq

Yes I will set the decel fuel amount to 100, it is at 70
2.4L 99 turbo cavalier fully supported MS2, 419hp, 70mph tire fire.
Jamie S
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Posts: 42
Joined: Sat Jun 05, 2010 6:16 am

Re: Injector duty cycle drop out, can see in AFR too, help

Postby elaw » Sun Apr 17, 2011 5:13 pm

Well I looked at the msq and the log and I can't see anything else that would cause what you're seeing. Try setting the decel fuel to 100 and see if that fixes it.
Eric Law
1990 Audi 80 Quattro with AAN turbo engine: happily running on MS3+MS3X
1997 Saab 9000 Aero: self-tweaked stock engine management (and stock engine)
1986 Audi 4000 Quattro: R.I.P.

Be alert! America needs more lerts.
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elaw
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Re: Injector duty cycle drop out, can see in AFR too, help

Postby Jamie S » Tue Apr 19, 2011 8:43 pm

Thank you !!!, im going to give it a shot on the dyno this weekend. Will let you know!
2.4L 99 turbo cavalier fully supported MS2, 419hp, 70mph tire fire.
Jamie S
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Posts: 42
Joined: Sat Jun 05, 2010 6:16 am

Re: Injector duty cycle drop out, can see in AFR too, help

Postby Jamie S » Sat Apr 23, 2011 11:07 am

Thank you , tried it out on the dyno (decel amount 100%). no more issue
2.4L 99 turbo cavalier fully supported MS2, 419hp, 70mph tire fire.
Jamie S
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Posts: 42
Joined: Sat Jun 05, 2010 6:16 am


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