K20 no start with correct injector sizing

K-Series Programmable ECU installation questions / support issues
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K20RX7
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Joined: Sun Aug 12, 2018 4:39 am

K20 no start with correct injector sizing

Post by K20RX7 » Sat Apr 06, 2019 7:20 am

Hello there,

PRA ECU Uk Type R K20A2 engine fitted to my Mazda RX7.

Im having an issue where if i try and start the car with the actual 1000cc injectors fitted it cranks and fires but does not catch.

If i reduce the injector sizing in the kpro to the stock 310cc injectors it starts and runs.

Im using a rising rate fuel pressure regulator set to 45psi.

If i tap the throttle the car cuts out.

Why wont it start and run with 1000cc in kpro settings.?

Look foward to any help. Map attached

K20RX7
Posts: 31
Joined: Sun Aug 12, 2018 4:39 am

Re: K20 no start with correct injector sizing

Post by K20RX7 » Sat Apr 06, 2019 7:25 am

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AREA876
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Re: K20 no start with correct injector sizing

Post by AREA876 » Sat Apr 06, 2019 7:39 pm

Did you set the dead time for the injectors you are using

K20RX7
Posts: 31
Joined: Sun Aug 12, 2018 4:39 am

Re: K20 no start with correct injector sizing

Post by K20RX7 » Sun Apr 07, 2019 2:29 am

Hello there.

Yes.
Deadtimes are accurate, they came with the set of brand new injectors. I found out later today that for some reason the hondata isn’t reading map sensor. Even when sensor and loom unplugged. It shows -29psi at all times.

Not sure if it’s a bug or if there is a fix for this

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Spunkster
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Re: K20 no start with correct injector sizing

Post by Spunkster » Mon Apr 08, 2019 9:27 am

HAs the map sensor wiring been modified or touched in any way?

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