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Stagea Rb25 In R33 Misfires, Chokes! Help Urgent!

OoskylineoO

By OoskylineoO,
in Engines & Forced Induction

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OoskylineoO Experienced

OoskylineoO

Posted
Posted

Did a search about this but unfortunately havn't found a straight answer yet :)

Problem is, i just put a s1 stagea motor into my s2 r33 gts4, originally it was NA. I plugged a factory r33 s2 gtst ecu in (assuming s1 stagea rb25 and r33 s2 rb25 are the same) but it misfires and chokes badly after about 3000rpm when i put my foot down. I don't know if this is because of the differences in ecu if any? or if there is something wrong with the motor itself.

Question is am I going to have to find a s1 stagea ecu and wiring loom and replace the existing one?, are there any differences between the s1 stagea rb25 vs r33 s2 rb25? injectors maybe? :S i noticed the ecu plugs between the s1 stagea rb25s and s2 r33 rb25s are different. Are there such things as ecu r33 stagea adapters?

Im out of ideas.

Any help will be greatly appreciated thanks guys!

geraus Mentor

geraus

Posted
Posted

did you check your coilpacks? spark plugs? how much boost r u running? sounds obviously stock to me, so im guessing you should run your plugs gapped at 1.1 or 0.8 depening on what boost your running and the heat range... 5,6,7 like BCP6ES 1.1 or 0.8mm or something. check your coilpacks wiring loom as well and plugs..

Tangles Grand Master

Tangles

Posted
Posted

stagea ecu pinout and r33 ecu pinout are two completely different creatures.

it may be that the ecu isnt reading an injector. or similar.

can guarantee it isnt reading all that it is meant to.

best bet is to use the ecu that is meant to be used with the engine, ie stagea ecu.

Conrad 2NR Enthusiast

Conrad 2NR

Posted
Posted
Did a search about this but unfortunately havn't found a straight answer yet :)

Problem is, i just put a s1 stagea motor into my s2 r33 gts4, originally it was NA. I plugged a factory r33 s2 gtst ecu in (assuming s1 stagea rb25 and r33 s2 rb25 are the same) but it misfires and chokes badly after about 3000rpm when i put my foot down. I don't know if this is because of the differences in ecu if any? or if there is something wrong with the motor itself.

Question is am I going to have to find a s1 stagea ecu and wiring loom and replace the existing one?, are there any differences between the s1 stagea rb25 vs r33 s2 rb25? injectors maybe? :S i noticed the ecu plugs between the s1 stagea rb25s and s2 r33 rb25s are different. Are there such things as ecu r33 stagea adapters?

Im out of ideas.

Any help will be greatly appreciated thanks guys!

What MAF are you using?

OoskylineoO Experienced

OoskylineoO

Posted
  • Author
Posted

mucked around with it for a whole day and found it was AFM and boost spike? engine would cut off wen i put my foot down. But issue is fixed now. Thanks to all who gave a thought!

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