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Opinion - R34 Gtr Running Rough / Blowing Black Smoke

Got Boost?

By Got Boost?,
in Engines & Forced Induction

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Got Boost? Experienced

Got Boost?

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Hey guys,

Picked up my car from the shop today and was running perfectly. Was driving it home just about an hour ago and i gave it a little in first, car hit the limiter and backfired a little and after that i went easy on it as i didnt really mean to hit the limiter. Now since ive got it home its idleing fairly roughly and blowing a bit of black smoke, boost is rough to, when i accelerate at around 40/50 km/h it surges a little and isnt smooth at all.

Any ideas what ive done here? i wasnt hard on the car at all and the ECU which is F-Con V Pro is set to a safe limit etc so i didnt think i could damage it very easily.. there is no white smoke or leaks or obvious signs everything else is ok, starts perfectly etc.

Got Boost? Experienced

Got Boost?

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  • Author
Posted
+1 probably cooler pipe. Does it still make boost??

It makes boost but its very hesitant and choppy and doesnt wind up properly. Should i try building it up to 4000rpm or so and seeing if it makes proper boost? I guess that would indicate a pipe could be loose?

Got Boost? Experienced

Got Boost?

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  • Author
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Ok so i just tried and at 4k, 4.5k it was pretty much not making any boost. Does that indicate there is a leak in the system somewhere? Ive checked the pipe to the plenum and it is fine. The pipes connecting to both sides of the cooler are ok to. Is it likely to have come off in a particular spot?

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