1987 F150 Fuel injected
Good Day folks. I'm helping my 16 year old son work on a 87 F150 he got a really good deal on. Read Free! A friend owned it since new and parked it 3-4 years ago. The truck only has 75,000 miles on it. He was using it as a plow truck at the lake so a lot of things were let go. Front gas tank sprung a leak so it was disconnected. Truck finally quit due to a fuel problem. We think we have narrowed it down to the fuel filter. This filter has 4 lines in, 2 from each tank, and 2 lines out. One goes to the high pressure pump and the other runs up to the engine compartment, some sort of a return/overflow. Since we eliminated the front tank, we threw the filter away and installed an inline filter. We spliced the retrun line together with 50 psi gas hose.
Finally we get to my question. How in the He__ do you bleed the fuel system. I have never worked on a fuel injected system before. With a carb just keep adding a little in the throat till she primes herself, not so easy with this. I do have a fuel pressure guage, but this is more for testing running pressure. When you hit the key the pump in the tank and the high pressure pump run for a few seconds. I think this is to charge the system prior to ignition. How do I get these pumps to run continous so they can build up fuel? How do I bleed off the air in the lines? If we can get this thing running I'm going to be a real hero. I've always told my son, give anything a try, but if your really stumped asked someone who knows.Don't fumble around wasting time until you wreck something. So here's hoping someone can offer some advice on this subject. We do have a Haynes manual that my son picked up, but it's nothing like the old Chilton Manuals I used to have. Help, springs coming and my son is just dying to get this truck on the road. Thanks.