I have a Check engine light, ISC 8.3 you can clear it it comes back on in a couple of hours. VMSpec shows engine speed abnormal change.
Those might be a result of the timing control signal error.
I'm thinking cam/crank position sensors/ connections
Watch for RPM changes on the meter with no changes in engine tone. Maybe clean or change the Crank sensor and or cam sensor .
Light went out this afternoon. May have gotten moisture in it from driving all day in that flood Monday that moved across Texas Louisiana. We'll see if it stays off.
Seams as though the gremlins have left the area 800 miles no more issues! I'm still going to look into the connections. I'm going to jinx myself but the old girl ran good this year Yuma to New Hampshire to Florida to Alabama back to Yuma for the winter.