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Fuel Delivery Problem
ISSUE: running well for 15-20 min. then loss of power and stalling/dying. Have to wait with engine off the longer the better, then continue to drive to get home.
HISTORY: Just bought 99' 7.3L Econoline Van with known bad torque converter. The van is very straight and undersides are dry with no leaks. With bad converter it still ran well just had an obnoxious noise. Before replacing I drove about 300 miles. In that time I lossed power on a steady mountain pass and knew i needed a fuel filter. I had Converter replaced(tranny in good condition). Drove back home 100 miles and was stalling along the way. At home I replaced fuel filter (extremely dirty!!) and fuel bowl was 1/3 full of silt. I cleaned the bowl thoroughly and now water could escape from the drain when triggered. also learned previous owner would run old home heater oil straight into tank as he was an HVAC guy.
OIL CHANGE DELO 400 W/ REISLON QUART
CLEAN FUEL BOWL
DROP AND CLEAN FUEL TANK (lots of corrosion on lining, rust like)
BOSCH FUEL PUMP
RAN ENGINE AND DROVE WHILE HOOKED UP TO COMPUTER W/ MECHANIC
DROVE UNTILL FAILURE WITH PRESSURE GAUGE AFTER FUEL PUMP.(pump would work fine, but when high demand pressure would drop to 0 and would recover very slowly if at all. Once van was turned off for 10 minutes, pressure would rebuild and it would drive again for a short while) *this was before new fuel pump was installed.
Drives awful and dies with symptoms of fuel starvation only when under load. At idle it sounds great and will hold idle for long time.
1. Can fuel pick-up become clogged on the inside of pickup unit. Not the screen, I removed screen before re-installing tank and will try a primary fuel filter, but within the guts.
2. Could this be a fuel pressure regulator?
3. I know oil pressure commands the injectors. where is the oil reservoir or place to check pressure?
Thanks people, this is my first post