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R Chassis Technical discussion related to the R Chassis such as the R31, R32, R33, R34, and R35.


 
 
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Old 07-27-2019, 01:40 PM   #1
Rb25detJay
 
Join Date: Jul 2019
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RB Rb25det Running ROUGH

Hey guys I have an rb25det swapped 240sx which i received recently.

I changed the following things recently

spark plugs from brp6es to brp7es
Coil packs from Yellow jackets to splitfires

I noticed it was backfiring on idle and when I revved it, it seemed to be revving rough or have some sort of lag.

I gapped the brp7es to .28 and the backfiring at idle stopped.

However, the rough idling and the rough shaking still stays, any ideas on what it could be ? Thanks


I'm relatively new to the S chasis and the RB, any and all help would be appreciated.
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