I've corrected the engines to behave as they should on fuel consumption (afterburner had negative fuel consumption rates!) and reset the exhausts to emit correctly (afterburner had the dry exhaust emitter set!) Left Engine
TSFCM0=0.680
TSFCM1=0.853
AfterburnerTSFCM0=1.950
AfterburnerTSFCM1=2.383
MinFuelFlow=0.01
ExhaustEmitterName=CleanExhaustEmitter
ExhaustPosition=-0.65,-6.23,-0.58
AfterburnerNodeName=afterburner_L
AfterburnerEmitterName=F4AfterburnerEmitter
MinExtentPosition=-1.13,-6.28,-1.02
MaxExtentPosition=-0.14, -1.24,-0.04
Right Engine TSFCM0=0.680
TSFCM1=0.853
AfterburnerTSFCM0=1.950
AfterburnerTSFCM1=2.383
MinFuelFlow=0.01
ExhaustEmitterName=CleanExhaustEmitter
ExhaustPosition=0.65,-6.23,-0.58
AfterburnerNodeName=afterburner_R
AfterburnerEmitterName=F4AfterburnerEmitter
MinExtentPosition= 1.13,-6.28,-1.02
MaxExtentPosition= 0.14, -1.24,-0.04