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Initial Start Rb25 Stumbles Then Levels Out

BahamaSky

By BahamaSky,
in Forced Induction Performance

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BahamaSky Apprentice

BahamaSky

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Since i installed my 550cc injectors my rb25 stumbles only on inital start up. After I start it up once and cut it off and start it again it starts fine. This only happens when the car cools down completely. Any Ideas why this happen?

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Sammy34 Community Regular

Sammy34

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Since i installed my 550cc injectors my rb25 stumbles only on inital start up. After I start it up once and cut it off and start it again it starts fine. This only happens when the car cools down completely. Any Ideas why this happen?

Mine does it also, think its jsut the bigger injectors, do you have an aftermarket fuel reg? if your running a turbosmart fuel reg they dont hold pressure in the lines when you turn the car off, makes it a bit of a bitch to start up again, what i do i just turn the ignition on and prime the fuelpump, then kick the car over.

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BahamaSky Apprentice

BahamaSky

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Mine does it also, think its jsut the bigger injectors, do you have an aftermarket fuel reg? if your running a turbosmart fuel reg they dont hold pressure in the lines when you turn the car off, makes it a bit of a bitch to start up again, what i do i just turn the ignition on and prime the fuelpump, then kick the car over.

Yeah I did that and sometimes it helps and other times it still does the same thing.

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Sammy34 Community Regular

Sammy34

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Yeah I did that and sometimes it helps and other times it still does the same thing.

yeh unfortunetly just one fo those things, could possibley need your cold start re done. But if its anything like mine, biger injectors, fuel reg that doesnt hold pressure when cars turned off, just annoying little things.

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SXC-R34 Collaborator

SXC-R34

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same problem. I got 800 CC's, I thought it happend cause my injectors were too big but neways looks like you guys got it too. I don't think it's a major problem and like Sammy34 says it's just 1 of those things.

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axe s Experienced

axe s

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HAHA... same thing...

800cc SARDS, turbosmart FPR...

I thought it was just running to rich on start-up,

good to know i don't need to get it tuned again... lol...

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