That is a good start Ryan, the injector cleaner should do a good job of cleaning your fuel system internally if you use it for a while.

Once you confirmed that there is no false air etc. or other issue causing (loose vacuum hoses ???) the problem, then you can decide to go in deeper and clean the inlet manifold etc. MY 2010 5.0 SC Galway green and sand interior!!
Have the Faultmate MSV2 Extreme to be tinkering with the settings etc. !!

There is a TSB from LR on this issue - they recommend the use of BG44K fuel cleaner. I used it on my SC when I had it and it worked a treat. You are only meant to use it once a year though.  Stolen / Gone: 2006MY Supercharged LPG Autobiography - Zambezi Silver with Sand/Jet/Jet Oxford Leather.....

Thanks CG.

From a bit of online reading, it seems that mainstream off the shelf fuel cleaners/ additives are a myth in so far as there are many who suggest little to no evidence they work in any way, including a historic AutoExpress review article.

BG44K does seem to be one of the few that people think has a benefit although it seems to be something you can only order online.

Should be able to get a can of BG44k at your local Kwikfit Current Fleet:-
2018 Discovery 5 3.0 HSE
2021 Ford Ranger Wildtrack
2019 Ford Mustang Bullitt 5.0 V8
1993 Defender 90 200TDI Pickup

Gone - not forgotten
2016 L405 4.4 SDV8 Vogue SE
2012 L322 4.4 Westminster
2004 L322 4.4 V8 Autobiography LE
2000 P38 RR 4.0 HSE (ex Clarkson test car)

Amazon = two days to deliver

Thank you

Good idea nicksaab, the local Kwik Fit has it in stock for £20/can.