Fuel injector pulse issues :(

K-Series Programmable ECU Calibration updates / downloads
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ishusovis
Posts: 3
Joined: Fri Jun 27, 2025 12:48 pm

Fuel injector pulse issues :(

Post by ishusovis »

Hello! I’m new to community of kswaps and Kprov4 and so far i’ve been having fun. I did unfortunately run into an issue while trying to make a base map to drive it till i get to a tuner.

My setup as follows

K24A1 Stock block and internals
Stock injectors (240cc)
Stock Intake
Log manifold
GT3568 (not currently hooked up)
Rsx type-s harness (02-04)

My issue is my injectors aren’t firing in order and only fire in pairs at a time. I noticed my fuel wasn’t injecting so I pulled the rail off and i’m looking for the pattern. If i upload or “refresh” the calibration basically doing nothing and hitting upload. the injectors alternate in pairs. Ex. Cranking the first time gets me Injectors 1 and 4 to spray, then after the “upload”, injectors 2 and 3 spray. I can’t seem to figure out why. I’ve gotten it to start with just two cylinders miraculously but my duty cycle is at 50% and my injector rates at 35.00 roughly which also led me to believe it’s only firing with two.
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Spunkster
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Joined: Fri Sep 20, 2002 5:06 pm
Location: Hondata

Re: Fuel injector pulse issues :(

Post by Spunkster »

When you datalog while it is doing this, what errors are reported?
ishusovis
Posts: 3
Joined: Fri Jun 27, 2025 12:48 pm

Re: Fuel injector pulse issues :(

Post by ishusovis »

I get a voltage code and a 02 sensor malfunction. I don’t currently have it hooked up and for the voltage i’m assuming it’s because i’m not using connector 101 which i’ve tapped into the power wires for the ecu to read. Here’s my calibration if you’d like to see.
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ishusovis
Posts: 3
Joined: Fri Jun 27, 2025 12:48 pm

Re: Fuel injector pulse issues :(

Post by ishusovis »

I’m thinking that the k24a1 isn’t compatible with the kprov4 because of its timing. I’ve checked timing twice, pulse plates and wiring. Even swapped harnesses with one is known to work, still does the same thing. weird thing is different tunes on kpro will either have no injectors fire at all, and this was the only one i found which did
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