| Re: Rough idle and more |
Subject: Re: Rough idle and more by bogus on 2010/2/28 23:06:03 Ah.. I hate it when posts are right on top of each other like that. wow. I am betting pump. The best way to test the regulator is to smell the vacuum line. If it is wet or smells STRONG of fuel, it is failing. The fuel pump circuit has a fail safe - please note this is a one way fail safe - and that is the oil pressure switch. If the engine is producing 4 PSI of oil pressure, it will run the fuel pump if the relay fails. Please note that this will NOT shut the engine off. The idea is to make sure the engine keeps running. If the op drops that low, you will get all sorts of warnings on the IP that you can safely park it. Also, the pump will prime for 2 seconds. Or should... If pressure is ok, you won't hear it as much. With all that you are showing, I am betting the pump is over heating and dying. The way the fuel system works is simple, really. There is so much volume of fuel, that there is no way in hell it will all burn. So it flows through the rail and returns to the tank. This keeps the rail cooler and all but stops vapor lock. At the same time, the tank does get warm. On a hot day, don't be surprised if the fuel temp exceeds 120F. Fuel pumps are easy... but you may want to consider a full on sender at this time, taking into account the fuel gauge error. |
