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Miss when hitting initial boost


bumble zee

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My brother has a RB25DET with a series 2 wire harness and has developed a miss when initially getting into boost. After a few misses it runs like a raped ape. I cant hear any ticking under the hood. His boost pressure is sitting at 7 to 8psi. His tach isnt hooked up yet so I dont know the RPM's.

 

He had a mechanic friend look at it and he said the o2 sensor looks to be bad. It shows .02 volts before boost, then after it drops to 0. If he disconnects the o2 he said it runs a little better but still has the miss. It isnt anything intrusive. Nothing like a shutter that I get from time to time in my Turbo 240z.

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