fuel problems again!
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fuel problems again!
I just replaced the HP fuel pump on my 86 BII last week. It ran great for a day. Slowly but surely it is back to the same problem again.
It idles fine. It drives constant speed fine,but cant accelerate. It's getting worse every mile.
In case this is related, Advance sold me a fuel filter that looks nothing like the filter on the truck so I did not install it when I replaced the pump
Any sugestions for me? I'll be walking soon
It idles fine. It drives constant speed fine,but cant accelerate. It's getting worse every mile.
In case this is related, Advance sold me a fuel filter that looks nothing like the filter on the truck so I did not install it when I replaced the pump
Any sugestions for me? I'll be walking soon
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Originally Posted by Monty06
when you changed the hp pump did you also change to intank pump sounds like it could be your intank pump going out on you. but first i would check your fuel pressure
check your fpr too
check your fpr too
The only time it is a problem is under acceleration. Is there a way to check fuel pressure while driving? Connect the pressure guage to a hose that can reach into the cab or something like that?
THe problem has been going on for a long time, but only got severe recently. For a long time it only happened when it was low on fuel. Now it happens no matter how much gas is in the tank.
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Thanks Ken
I hope I can get a real fuel filter. The one from Advance auto does not match the factory filter. Maybe its a dealer-only item. I hope that does it because I'm not looking forward to changing the other pump
I hope I can get a real fuel filter. The one from Advance auto does not match the factory filter. Maybe its a dealer-only item. I hope that does it because I'm not looking forward to changing the other pump
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Originally Posted by mrshorty
Have you put a fuel pressure gauge on it? It is possible to put a fuel pressure gauge on and rig it up so you can do a road test, just requires a little care and ingenuity.
I think its going to tell me what I already know, that I'm not getting fuel. Would it help me tell *why* I'm not getting fuel, like if its the LP pump or not?
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From: UT
That could work, but you need to realize that a fuel pressure gauge on the rail can't tell you, by itself, why the fuel pressure is low. The idea is just to determine if the problem is related to fuel delivery or not.
Once on my Explorer, I hooked up an ammeter in line with the fuel pump while I had a gauge hooked in the garage. I then saw that I could correlate current draw to fuel pressure, and could monitot the pressure in that way. Haven't tried this on the dual pump set-up in my BII, but I expect it could be made to work.
If a fuel pressure test does show the fuel pressure is low/erratic/dropping out, then do some other basic tests before assuming the LP pump is bad and dropping the tank: Is the LP pump getting power? Does it have a good ground?
Once on my Explorer, I hooked up an ammeter in line with the fuel pump while I had a gauge hooked in the garage. I then saw that I could correlate current draw to fuel pressure, and could monitot the pressure in that way. Haven't tried this on the dual pump set-up in my BII, but I expect it could be made to work.
If a fuel pressure test does show the fuel pressure is low/erratic/dropping out, then do some other basic tests before assuming the LP pump is bad and dropping the tank: Is the LP pump getting power? Does it have a good ground?
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the fuel filter is a cartridge type and is located under the driver side inside frame rail. It should look like a small canister and I had to use a strapwrench to get it loose. Once you get it loose you will need to take 2 bolts off that holds the mounting base in place. Then the filter housing should unscrew with no problem. I also checked the fuel pressure on my 86-2.9 and had 35 to 40 Psi. but no volume coming from the pump. When I replaced the tank pump I now have volume and pressure. I don`t know if it`s true or not but I was told that the high pressure pump was trying to pull gas from the tank by itself
