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Old 03-20-2017, 01:32 AM   #1
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Rb25 spark plug issue

Okay so I've looked through many different threads and can't find a straight forward answer to my problem so please don't give me the bs about starting another thread. So I can't figure out what to gap my plugs to, I have fmic full exhaust upgraded fuel pump stock Ecu stock intake etc. I was running on 10psi and every time I'd get into high boost it cut out so I figured I needed colder plugs along with regapping them, I've Gapped them several times with no luck, everytime I give it gas it won't rev past 3 grand and just falls on its face. Any helps appreciated, oh and the plugs I went with were the NGK bkr7es I believe, thanks again.
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Old 03-26-2017, 02:50 PM   #2
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Got a new maf sensor didn't solve the issue but now it'll rev to 4K and sometimes even 5k
Still falls on its face and won't build boost
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Old 03-26-2017, 03:08 PM   #3
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Have you boost leak tested
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Old 03-27-2017, 06:46 AM   #4
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Boost leak test that would be a waste of time and surely has nothing to do with not being able to boost...
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Old 03-27-2017, 09:27 AM   #5
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Definitely check for a boost/ vacuum leak. Spark plug gap on the RB25 should be .028 to prevent spark blow out. RB25 oem coil packs don't pack much of a punch.

If there are no leaks and plugs are good I would check injectors to make sure they aren't leaking.


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