70ls1chevelle

iTrader: (114)

I have a check engine light on for knock sensors,will this make my truck run crappy or in limp mode ? Even though its tuned with HPtuners and while scanning it picks up no knock to where it would be taking away timing ?

I scan my 04 Silverado 2500hd 6.0 codes P0327 knock sensor circuit low voltage & P0300 engine misfire detected (old) (Immature) not sure where to start on this.The truck runs ok smooth doesn't sound like any misfire just seems weak on power but its felt that way the whole month since I bought it ? Where should I start

FFDP

iTrader: (2)

Already kinda told you in your other thread what needs to be loooked at.

https://www.performancetrucks.net/fo...sensor-532685/


Buy new intake gaskets, buy new knock sensor, buy new knock sensor harness and that will fix all those knock sensor codes and problems. As the misfires, buy some new plugs and inspect your wires. Replace wires if needed, then if the problem is still there you need to dig deeper. Be it a coil packs problem, injectors or something like that.

70ls1chevelle

iTrader: (114)

I changed wires and plugs last week,it seems like after changing those it ran a little smoother and the flowmaster mufflers sound quieter ?
And today I changed knock sensors and harness,and intake gaskets.The knock sensors looked rusty like they got pulled out of the ocean not sure they were even plugged in the top came right up when pulled the rubber seal,and the intake gaskets were definitely questionable for being 30k on motor supposedly,rubber seals weren't straight up and down looked as if they might have been leaking against the heads. Didn't notice much of a power increase like I would have thought from the looks of the old parts,it did die after acceleration and come to a stop? I figured maybe it didn't need turned up in the tune before because of the intake leak,now it might not be getting enough air ?