It starts and run fine until it reaches normal temp, about180. Attempted restart at normal temp, no injector pulse for fuel. Always good fuel pressure and ignition, just no injector pulse. Ignition module has been changed. No DTC. Wiring between module and ECM is ok. Grounds for injectors and ECM are ok. 12v. is present at injector harness. Pulse from ignition module to ECM ok. Seems obvious, to me, that something is breaking down due to "normal", not escessive heat. Initial "cold" start and any restart before normal temp is fine, just no restart after reaching "normal" temp. This is not an erratic problem, but constant, and will be duplicated each time engine reaches temp. Stumped!! Any ideas? Thanks

 

Injector pulse and spark are 1st determined by the stator in the distributor. If you have spark and no pulse, it would probably have to be ECM, since it uses the reference pulse from the stator to determine injector pulse. L98's are left bank, right bank injector pulse, not sequential.