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Discussion Starter · #1 ·
I swapped a K20 into my EG with a K24 block. :D

But, the check engine is almost always light on. When we run a test with the honda computer, the code is "fuel too lean". What does it mean? I changed my fuel pump but the problem is the same. I have a V2, a DC Race headers and HKS exhaust. :mad:

I'm looking now for change the injectors (k24 injectors). Does anyone have a suggestion or a solution for my problem?

Thanks :(
 

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civicK20K24block said:
I swapped a K20 into my EG with a K24 block. :D

But, the check engine is almost always light on. When we run a test with the honda computer, the code is "fuel too lean". What does it mean? I changed my fuel pump but the problem is the same. I have a V2, a DC Race headers and HKS exhaust. :mad:

I'm looking now for change the injectors (k24 injectors). Does anyone have a suggestion or a solution for my problem?

Thanks :(
ive got a set of K24 injectors if you want them... $120 shipped will do it
 

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What kind of ECU are you running?
 

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did you guys send out my harness yet? hybrid-racing?

i payed you guys through paypal a long time ago, and i havent heard much about it since (except one message i got when i PMed to inquire what was going on! but i didnt really get any info from that message)

anyways, please let me know whats up, im going to PM you the shipping details so you can reference it to something
 

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Discussion Starter · #6 ·
I use the PRBA06 ECU stock. The code is "fuel too lean" but I don't have the number. I read an article that mention that the K20 have a little bit problem when you try to increase the fuel volume because there is no fuel return line and the regulator is with the fuel pump. But, in my case, I have a civic 2003 DX. Is this the same thing than the RSX?

If I changed the fuel pump(walbro) and nothing else, is this really increase the fuel volume? Do I need to change the regulator to have more pression, the fuel rail and the injectors? In my case, my car have 205WHP and with the 2.4l block, I fear that the RSX stock injectors 310CC are not enough.

Thanks
 

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civicK20K24block said:
I use the PRBA06 ECU stock. The code is "fuel too lean" but I don't have the number. I read an article that mention that the K20 have a little bit problem when you try to increase the fuel volume because there is no fuel return line and the regulator is with the fuel pump. But, in my case, I have a civic 2003 DX. Is this the same thing than the RSX?

If I changed the fuel pump(walbro) and nothing else, is this really increase the fuel volume? Do I need to change the regulator to have more pression, the fuel rail and the injectors? In my case, my car have 205WHP and with the 2.4l block, I fear that the RSX stock injectors 310CC are not enough.

Thanks
do you have a fuel pressure gauge? are you even putting out a nice consistant fuel pressure?
 

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The code is generated because the short term closed loop adjustment has pegged at it's maximum addition of fuel. Basically it means that the injector/fuel system is not matched to the engine, which makes sense since you have increased capacity 18% without telling the ECU.

Whatever you do, resist the urge to run the engine under fill throttle or high rpm, as the engine will be running fairly lean at full throttle, until you verify the A/F ratio on a dyno or with a wideband.

The K24 injectors don't flow more than the K20 injectors, so don't swap them out. You can increase fuel pressure - to make the injectors flow 18% more you'll need to increase the stock K20A stock fuel pressure from 50 psi to 70 psi. Check that fuel pump can handle this, and also remember that the engine has changed and the compensation from the fuel pressure is only approximately what the engine needs.

Of course, the correct solution is to re-map the ECU to suit the engine. The 310cc injectors will flow to about 230 whp @ stock fuel pressure, so you should be able to use them.
 

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Discussion Starter · #9 ·
Thanks a lot for your explain. You really seem to know what you talk about. So, I just need a precision in regard the re-mapping of the ECU. What I need to update in the ECU with the Honda Computer? Is there a table to change the amount of fuel pression or A/F ratio?

Thanks!
 

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Discussion Starter · #11 ·
My ECU is running stock like I mentioned. My fuel pressure is stock too. The only thing I did is put a walbro fuel pump that fit on a 2003 civic DX(it can support 70 PSI). I will get a comptech regulator to try to increase the pressure to 70 PSI like the Hondata guy said and trying to re-map my ECU. For the moment, i don't know how but I know a guy in Quebec City who work for honda that is able to do this. For the injectors, I will keep my K20 like he told.

I don't want to put a Hondata before I purchase my jackson racing supercharger because it's include in the race kit version. I will get it in may or june but for the moment, I search for a costless solution to economize money for the supercharger.
 
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