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1.8 Swap Dying After Start

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Old 07-15-2021, 04:49 PM
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Default 1.8 Swap Dying After Start

Hey guys! I'm currently trying to get my 1.8 swapped 91' running on an Ms3x. It seems to start up fine then dies a few seconds later. I've tried increasing AsE and WuE but it doesn't seem to be helping.

I'm running the TruboKitty basemap for NA6 with adjusted ReqFuel and injector dead times for FF640's.

Any Ideas?
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Old 07-16-2021, 02:24 AM
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So I "fixed" the problem by changing the injector size in the required fuel down to about 350. The car is still idling at about 90 VE though. Does anyone know what would cause the injectors to deliver less fuel than expected? I'm thinking it could be fuel pressure regulator related?
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Old 07-16-2021, 05:11 AM
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Did you not wire it up for sequential fuel? Because you have it set for batch fuel.
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Old 07-16-2021, 02:10 PM
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Yeah, I'm still running batch for now.
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Old 07-16-2021, 07:17 PM
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Injectors kinda need to run above ~2ms pulsewidth to work linearly, or like the reqfuel calculation expects it to be.

On most miata with bigger injectors that can be hard. I've never had injectors respond much at all below 1.6ms or so, and with sequential fuel and 91 + 60psi base pressure I remember being all over that on my old miata. If I had to divide that singular fuel pulse there's no way it would work.

I have no idea how semi-sequential works, nor alternating 2 squirts. I believe as soon as you enable timed injection all of those settings go out the window and it goes to a timed batch injection, each pair firing twice a cycle. If so, the calculated pulsewidth is too low. Adding the extra wires was easier than understanding all that bullshit, makes no sense to not run true sequential.
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