Thought it was weird that both codes popped up at same time. Just wondering were to start at to diagnose the problem before i spend the money on injector and glow plug.

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05 jeep liberty Kerma tuner, K&N filter 3 in. lift,
99 dodge 2500 jvd torque enhancer, 200 hp injectors, fass 150, 64/71/14 turbo, k&n cai, arp studs, hmr dual disk clutch

I swapped the number 2 and 3 injector and still getting the p0303 code. So i assume injector is still good. Would a bad glow plug cause the it to misfire code.

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05 jeep liberty Kerma tuner, K&N filter 3 in. lift,
99 dodge 2500 jvd torque enhancer, 200 hp injectors, fass 150, 64/71/14 turbo, k&n cai, arp studs, hmr dual disk clutch

Are you able to reset the code and see if it recurs?

Is the engine running rough?

I'd be concerned about the glow plug tip having damaged the injector or valves..

Mark

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2005 Liberty CRD
2004.5 Cummins 5.9L TD, F1s, NV5600 6-speed in a '93 GMC Suburban

I cleared the codes and they came back. It idles smooth when cold but once it warms up it runs rough.

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05 jeep liberty Kerma tuner, K&N filter 3 in. lift,
99 dodge 2500 jvd torque enhancer, 200 hp injectors, fass 150, 64/71/14 turbo, k&n cai, arp studs, hmr dual disk clutch

did you resolve the issue?
I'm having the same issue engine idles rough when hot CEL comes on and have the p303 code.
I have the "new" "improved" filter head. also installed a 6.5 GM lift pump trying to eliminate any air in the system.

Thanks
Adrian

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2005 Silver CRD Sport, GDE ECO, SAMCO Tubing
2003 Silverado HD 2500 6.6 Duramax LB7 ZF6 (EDGE Juice w Attitude)
1983 300sd (turbo diesel)