Low injection quantity

[Beany1]

Hi injection quantity is bouncing around 1.5 and 2.5 mg it supoossed to be around 3.0 to 9.0 mg what could be the problem all 4 injectors are reading within range audi a4 b7 2.0 tdi 2006 thanks

[Steve Q]

Have you had a diagnostic check to see if any fault codes flag up? 

[Beany1]

Hi steve yes had someone yesterday on vcds vagcom it only came up with p0674 for cylinder 4 glow plug apart from that he said everything was good full health check all sensors everything working air flow all good injectors within spec the only thing is injection value bouncing around 1.5 to 2.5 mg and it says it supossed to be around 3.0 to 9.0 mg is there anyway a tuner can sort that out thanks 

[Beany1]