I just got my truck tuned and when i hammer on the gas it makes a popping noise. I had it retuned and it still pops. what could cause this? The guy said it could be the fuel pump or fuel system but i have twin 255 pumps and an aeromotive fuel regulator kit. I noticed that when i ease into the throttle and then hammer it, it doesnt pop. why only when i stomp on it?? Any opinions? My mods are listed below
JLP Built block
Ported heads
Crower Cams
Whipple Supercharger (Pushing 18 psi)
Longtube Headers
Magnaflow Cat-back
SCT 2400 MassAir 90mm
JLP Air Intake
Twin 255 fuel pumps
Aeromotive High flow fuel rails
2400 Stall converter
JLP Transmission
60 lb injectors
SCT xcalibur 2
Heat exchanger

 

Have you checked your fuel pressure when you hammer it? HAve you checked your voltage at the pumps?

 

Also there is an extra relay for the pumps make sure that one is working. I had that problem once.

 

when i stomp on it the fuel pressure goes to 49-55

 

Fuel Filter or Plug is my guess, "IF" it was tuned on a Dyno my guess is they hurt a plug, if not my guess is you still may have a slightly hurt plug.

What can sometimes happen (and has to me many times) is you only crack the porc a little, or just melt enough of the tip, that it runs fine on idle and easy throttle, but when you stap it the spark goes wacky and pop pop pop...

IMO you have to start by putting a new set of plugs in it, and if you find a bad one and the truck was tuned with it, the bad news is your AF is off.

GOOD LUCK