What causes this?

I get it a lot sometimes and none other times.

Might read my thread.

http://forum.mopar1973man.com/index.php?/topic/9721-odd-injector-misfire/

So my lope is a miss fire?

Possible... I'm not saying it is or isn't just be open minded.

 

Either way I would be looking at the fuel system first and do some bench testing.

• Like is there any error codes currently.
• Fuel pressure (idle to WOT at highway speed)
• What your injectors like currently? Mileage? Pop test?

7 x 0.010 is roughly a 100 HP injector using this information.

http://forum.mopar1973man.com/index.php?/topic/6494-injector-sizes-and-turbo-discussion/