Got a JGP supercharged silverado. couple months back I put on a set of pacesetter headers and ory (no cats). Truck ran great, pulled hard, felt fast. had a p0300 code for about a week til i realized an 02 sensor was unplugged. plugged the 02 sensor in and changed the plugs and wires and engine light went away. For some reason the truck has alot less power and im not feeling the boost in power like i used to when the blower would kick in. No engine since Ive been having this issue. I have no idea what could be causing this loss in power. Im wondering if maybe the 02 sensors are getting dirty enough to cause a power loss but not enough to throw a code. anybody have any ideas?

 

what plugs did you put maybe there too hot causeing detonation and timing to be pulled ??? or a wire not all the way snaped on??

 

ngk iridium plugs. shouldnt a loose plug wire cause a 30X code?

 

was that what was in there ? are they 5 heat range ? might need a 6 its a lil cooler . idk about the code thing . i had a loose wire and no light ? snaped it back on and bam run way better . but my truck is older my computer might be on the late train lol