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R33 Running Rich, Rough and Struggling to Start

Sweetalka
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Sweetalka

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R33 Running Rich, Rough and Struggling to Start

Hi all,

New to the site after trying to find answers through existing posts and come up with nothing

1993 R33 RB25DET (bought it NA and put the RB25DET in it) its been sitting for a year before I decided to register it.

was running somewhat fine misfiring and rough on high boost through gears but idled ok. 5 weeks into it and its overfuelling extremely strong blowing black smoke and sounds like a wrx no matter what speed im doing. on start up whether it was hot or cold it sounded like a dead battery but eventually wound over, this is progressively getting worse taking longer and longer to wind over, when it does wind over it takes a while to start (thinking fuel issue)

im getting 350km out of a tank and extremely fuelly inside and out of the car.

pinging when boosting

was wanting advice for where to look first? was thinking to test coil packs, maybe the CAS (a tune maybe?) suspected timing issue maybe?

standard motor and ecu with the usual mods.

I am using the non turbo exhaust could that play a part?

any help appreciated so I can start eliminating potential causes. thinking maybe its running advanced can I alter this via the CAS?

mechanically minded on naturally aspirated cars but bring fuel injection and ECUs in and im lost

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