Ive been having trouble for the last 6 months with my truck pining quote a bit while under a load. Otherwise it runs fine, and it didnt used to do it. I have a Magnasun supercharger, headers (no cats), custom program. I have tried various different gas, I only run premium. What can cause this to start out of the blue?

Thanks in advance!

 

What plugs do you run? It's possible the gap has gotten wider and they're too hot of a plug.

 

What type of weather change has there been? plugs are good to check, also, depending on the tune you could have timing added in a certain area depending on iats so it now pings because it is adding too much at the wrong time.

 

I replaced the plugs about 3 years 60-70km ago with the factory iridium plugs. Should I run a different plug with the supercharger? Also it seems to be worse in the summer or when the truck is hot. Thanks

 

Do not run iridium plugs with forced induction . Get NGK TR6s gapped at roughly .035 and see if your pinging goes away .

 

what he said ^^ that should fix your troubles.

 

Excellent i will try that! Thank You!

 

I put the NGK TR6s in and replaced my wires while I was at it. It did seem to make the pinging better, but I've still been able to get it to ping today once at full temperature. Is there any other simple fix I could try?

 

I'd recommend check with the tuner, it could be something in the tune being too aggressive for the climate/fuel additives.

 

Yes, that's what I thought, the problem is they charge a fortune for a custom tune. I have my superchips tune that came from magnasun, but Im worried I will start showing engine codes from having no cats.