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A LOT of black smoke.

skyhigh!

By skyhigh!,
in Engines & Forced Induction

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skyhigh! Enthusiast

skyhigh!

Posted
Posted

hey all

just replaced my exhaust manifold gasket, put it back together and now the thing wont idle and is producing a crap load of black smoke. the thing is last nite after it was all back together i started it up and it ran fine, but when came to moving it this morn it wont run. i also had a flat battery this morn so when trying to kick it over could it of damaged the ecu in any way?

ive pulled all the pipes off again checking if they were restricted but they were clear. do airflow sensors just pack it in? as this is the only other thing i can think of.

any help would be much appreciated

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lwells Grand Master

lwells

Posted
Posted

Is it black, or grey? Where is it coming from: exhaust tip or engine bay?

When I replaced the exahust manifold, turbo-to-dump, turbo-to-manfold, and dump-to-front gaskets my R32 GT-R was pumping grey smoke like something was on fire :P After about 30 minutes of idleing, the gaskets finally started to seal and the smoke disappeared.

The idle was a bit high, but was fine otherwise. I had to replace my sparkies the next day as they became fouled, I assume from a combination of (normally) rich running plus screwed A/F ratios due to the exhaust leak, and the 30 minutes it took for things to seal up.

Lucien.

caminperth Grand Master

caminperth

Posted
Posted

Black smoke and not running probably means you didn't connect up a cooler pipe properly when putting everything back together.

AFM sees lots of air so gives the engine lots of fuel. Engine sees little air so pumps the fuel out the back in the form of black smoke and backfires until it floods and stalls.

skyhigh! Enthusiast

skyhigh!

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cheers for all the replies. its all sweet now though. went through and reconnected everything( intercooler pipes, pod assembly) and the thing was still running rough, but after a bout an hour of trying it started, ran rough for bout a min then just kicked in, although it has a bit of a miss now though. time for a full tune me thinks.

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