Wondering if anyone had the same issue but I put a front facing plenum on my rb20det and it idles fine but when I press the gas it cuts out like it's holding back, I don't know what this could be coming from, I checked all my vacuum lines and everything is tight, it also throw out alot of white smoke out the tail pipe, the head gasket is still good, I replaced the spark plugs, I rebuilt the fuel injectors and replaced the o-rings, I'm just lost at this point any help would be appreciated