I had a P0263 cylinder/contribution code pop up today when I scanned my truck, no check engine light. just wondering what this could possibly mean or lead to? 255k on truck, egr delete and studs.
I'm putting out some black smoke lately when I mash on it while loaded down, the truck seems like it is down on power even tho its turned up 75hp. and doesnt seem to be running the smoothest odd idle but not all the time, is this an injectector issue???

 

Cleared code yesterday hasnt come back yet on short drive, will test after 400km drive tom. Any input guys?
Thanks

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What are you reading codes with?

Turned up 75hp? With what?

Could be an injector, could be the o-rings on the injector. Hard to say. Could even be weak batteries or a weak FICM.

 

Im still running sniper tuning reading it with that, soon time to get an sct , code not back yet. Abs light on too, guess I will have to look into motor more this weekend, might as well clean turbo too!

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I would really like to see ICP readings too, if possible? Has the HPOP ever been replaced?

 

HPOP has never been touched, yikes! what reader could I use to,get an icp reading?

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