hi anyone removed there thermostat. and will it reduce temp and pressure 4.4 v8 towing large caravan getting slow change up or no change up has anyone cured this yet .had new rad oil flush and change can the ecu be reprogrammed

Personally would not do it. Engine designed to run with a 'stat for a reason. Have you tried / checked your coolant cap?

Transmission flush may not do any good if your oil cooler is all gunged up! Was this checked?

See howto by SaintV8 on removal / replacement, on this forum. .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

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If coolant is below running (normal) temp the ECU will compensate by increasing fuel thinking it is still in warm up mode. The knock on is high fuel consumption.

hi have changed thermostat for 80 deg no noticeable difference in mpg . lpg changeover time is the same engine def cooler can put hand on top hose now . i have not tried caravan towing yet but will keep posted when i do .engine sounds better and is running great so fingers crossed my mpg is reading 20,4 at the moment and has not changed in 2 weeks give or take .4 mostly urban and a little motorway never above speed limit

Hasn't this been comprehensively championed by pete/Haylands?

do a search of his posts and you will find all you need.