1985 Ford F-150 Starting Problems

[95CutlassSupremeSL]

I would appreciate any help and thanks for looking at my forum. I just bought a 1985 Ford F-150 pickup, it has a 302 EFI engine 4-speed, when I first got the truck a couple of weeks ago, it ran just fine, but for some reason since the 1000 miles I put on it, it has a horrible time starting up. It usually takes me about 20 minutes to get it running and when it does run it idles weird, jumping from 750 to 1250 rpms every few seconds. I changed out spark plugs and gave it an oil change, no change. I have to take the intake hose off the throttle body to get it started, sometimes I got to use starter fluid which I know probably aint good for the EFI. The air filters fine, batteries fine, its getting enough spark, it just acts like its out of fuel even when I fill it up. I have know clue where the fuel pump is or fuel lines. Any ideas would be great


*By the way, since I dont have my 95olds anymore, does anyone know how can I change my name*

[mechhound]

Originally Posted by 95CutlassSupremeSL

I would appreciate any help and thanks for looking at my forum. I just bought a 1985 Ford F-150 pickup, it has a 302 EFI engine 4-speed, when I first got the truck a couple of weeks ago, it ran just fine, but for some reason since the 1000 miles I put on it, it has a horrible time starting up. It usually takes me about 20 minutes to get it running and when it does run it idles weird, jumping from 750 to 1250 rpms every few seconds. I changed out spark plugs and gave it an oil change, no change. I have to take the intake hose off the throttle body to get it started, sometimes I got to use starter fluid which I know probably aint good for the EFI. The air filters fine, batteries fine, its getting enough spark, it just acts like its out of fuel even when I fill it up. I have know clue where the fuel pump is or fuel lines. Any ideas would be great


*By the way, since I dont have my 95olds anymore, does anyone know how can I change my name*

Check the fuel pressure at the schrader valve, on top of the engine. Looks like a tire valve. You need a special tool, about fifteen to twenty dollars I think. Do you have 2 fuel tanks? 1985 was first year for EFI, I assume everything is the same.

[95CutlassSupremeSL]

Update: The fuel pressure seems to be fine and it only has one tank. The truck as of today will not start and stay on, it starts and stays on now for about 10 seconds vs. before when it wouldn't stay on unless it was warm. For those 10 seconds it runs erratically shaking the whole truck, bucking and what not. I checked the spark plugs, distributer cap and rotor, all fine. PLEASE HELP!!! Any ideas are greatly appreciated once again.

[Rasp]

I had a ford Ranger do something similar to this. It turned out that a vacume line "Grommet" (rubber cap thing) came off. Check all the vacume lines, they can make your truck run very irratic and therefore stall out if they are not connected.