Karl Brandon

Have installed a GTS Link into a series 2 GTST (no external igniter). Runs fine until load exceeds 6 psi then starts misfiringt massively. Strangely on a number of occasions pulled thru cleanly without misfire and AFR was good. Other times exactly the same settings pops and bangs all over the place like a severe igntion cut. Does the fact that there is no external igniter module pose a problem. Have set MAP limit to 255. Any ideas would be appreciated. Thanks Karl