||The "Check Engine" light is on and the engine has a miss.
||Bus taken to warranty dealer. Troubleshooting found faulty #5 ignition coil. Replaced ignition coil.
||"Check Engine" light is on. Engine is running rough.
||Bus taken to warranty dealer. Troubleshooting found dead misfire cylinder #7 and random misfires on all other cylinders. Warranty dealer determined problem is with aftermarket CNG conversion. CNG has piggyback module and is spliced to factory harness at several locations.
||Check engine light is on. Engine is running rough. Impco representiative is troubleshooting.
||Impco representative replaced injector #4.