fuel inj fault on my 412

sean glendening · Post by **sean glendening** » Thu Jun 17, 2004 4:03 pm

can anyone help cant get my 412 to run petrol is getting to rear of engine .but not through pressure reg tried to by pass it but no run thinking of after market fuel pump and pressure reg any thoughts guys sean

DeathBus · Post by **DeathBus** » Thu Jun 17, 2004 5:53 pm

Sounds like your regulator is bad. Your injection wont run without it, needs to be replaced.

raygreenwood · Post by **raygreenwood** » Thu Jun 17, 2004 6:17 pm

Wait....what IS the pressure on the loop? If it reads high...like 35-40....either your regulaor has been adjusted too high...which is doubtful..because the pump should be able to produce at least 65 psi.

Most likely, the regulator is rusted shut. Does fuel flow from the return line downstream of the regulator? Pull it loose and see. There may be an obstruction at the end of it in the tank or pump.

The pressure guage will tell all. If you are not building pressure at the fuel loop, check to see if (a) the pump is wired properly (b) the pump is recieving 12 volts (c) if thesock filter in the tank is clogged (d) If the main filter is clogged (e) if the relief valve on teh pum may have locked open and is venting the fuel to the return line. Ray

sean glendening · Post by **sean glendening** » Fri Jun 18, 2004 2:36 pm

thankschaps got it down to regulator cant get any petrol through it getting one offa 914 tomorow will see if the boat runs then

sean glendening · Post by **sean glendening** » Sat Jun 19, 2004 1:38 pm

not the reg after all reg set at 30psi pump wont produce that even when off car bench testing so its a new pump now .by passed reg had car running up street after 9 yrs stood will have to get new pump from germany sean