Hellbound wrote:From the research i did last year i found reports in the uk that the 2 + 2 setup( as in 2 micron prefilter with the stock 2 micron filter ) causes long term problems with the injector pumps as its stripping the fuel of all the additives that help lubricate the seals etc. And that the most used setup was a 10 + 2 setup, where the stock ones remains at the end of the chain with the 2 micron element, and a prefilter placed before the stock one was running a 10 micron.
30 micron wouldnt really cut it as a prefilter but there is a big difference between 2 / 5 and 10 micron ones. Either way the units youve mentioned should have a working buzzer / alarm or alerting system as bloody hell thats the whole point of installing one of these units as the stock one does filter quite well, and if changed regularly wont let bugger all through. Its the water in the fuel system which does all of the damage so which ever unit you buy, make sure its got a decent in-cab alarm to alert for water, which is saving it from going into the stock one which is crap for water filtration and large volumes of water in the fuel.
Ive gone with the racor 445 as it has a very high flow rate and had all the water sensor and detection stuff built in and hooked it up to a cheap buzzer / alarm i got off evil bay. Its gone off twice now on big trips and saved anything going further into the stock one...
The 30mic as a prefilter will not affect the fuel pump, but will pick up the biggest contaminates and help coalesce any dissolved water into droplets (to a degree).
My main problem with installing this filter as a secondary in 2mic is that you are giving Toyota an out for warranty.
If its upstream of their filter, they cant really blame it unless it's blocked solid. If its downstream they can.
Insta