Fuel Pump Problems
Thread Starter
|
Junior User
Joined: Dec 2004
Posts: 90
Likes: 0
Fuel Pump Problems
How would i go about testing the fuel pump(s) in my 88 bronco II. i have narrowed the problem down from the ignition system to the fuel system. so how would i go about to figure out which fuel pump is the problem...
Here is what happens:
get in car start it, let it warm up for 10 mins then go to school... on the way to school it dies out. after letting it sit for a few mins with the key on it will start and run for a few secs. then it dies out agian... 4-6 hours later when i get out of school and are home it will start and run alright for a 1/2 hour.
Jon
Here is what happens:
get in car start it, let it warm up for 10 mins then go to school... on the way to school it dies out. after letting it sit for a few mins with the key on it will start and run for a few secs. then it dies out agian... 4-6 hours later when i get out of school and are home it will start and run alright for a 1/2 hour.
Jon
Posting Guru
Joined: Aug 2004
Posts: 1,167
Likes: 1
From: miami florida
i just had that same problem turned out to be the in tank fuel pump
it would cut off and come back on whenever it decides.
you can do a selft test with your self test connections just pull codes easier than to start ripping things apart
it would cut off and come back on whenever it decides.
you can do a selft test with your self test connections just pull codes easier than to start ripping things apart
Postmaster
Joined: Oct 2003
Posts: 4,516
Likes: 1
From: SoCal
Originally Posted by monty06
i just had that same problem turned out to be the in tank fuel pump
it would cut off and come back on whenever it decides.
you can do a selft test with your self test connections just pull codes easier than to start ripping things apart
it would cut off and come back on whenever it decides.
you can do a selft test with your self test connections just pull codes easier than to start ripping things apart
www.superhighoutput.com/tech_view.php?id=5
Do you have a wiring diagram & voltmeter?
Thread Starter
|
Junior User
Joined: Dec 2004
Posts: 90
Likes: 0
Okay it is EFI, 2,9 liter (duel Pumps) dont have voltmter, when it wont start i here the in tank pump... when i turn the key to start.
nor no wiring diagram... just reecently replace the distibuter think that was the problem... well it contributed to it.
if you need any thing else dont hesitate to ask
Thanks Still looking
nor no wiring diagram... just reecently replace the distibuter think that was the problem... well it contributed to it.
if you need any thing else dont hesitate to ask
Thanks Still looking
Post Fiend
Joined: Dec 2001
Posts: 10,562
Likes: 4
From: South Jersey
Do you hear the HP pump on the frame rail when it's a no start?
Can you borrow a voltmeter or get a test light?
Can you borrow a voltmeter or get a test light?
Trending Topics
Fleet Mechanic
Joined: Jul 2004
Posts: 1,552
Likes: 0
From: va
you need to get the trouble codes even if the engine light is not on. I have an 87 F EFI the Hayes manual says its set up the same way as yours. My front tank was tested at ford with a fuel pressure tester and was found it doesn't hold pressure. It will run until I try to go up a hill. Put your ear on the tank and turn the key to run but not start to see if you hear a hum for 2 seconds. That would be the in tank low pressure fuel pump. Ford unhooked my fuel supply line ( smaller hose ) at the tank and put it into a fuel can and rechecked the fuel pressure it was ok. You could have a bad fuel relay, fuel filter, or on the rail fuel pump or fuel shut off switch by clutch pedal or the fuel pressure regulator. Pressure should be 30 to 45 psi while running. 35 to 45 psi not running. Tester runs about 40.00, you need one to go to 100 psi for efi's. I hear if you squeeze the return line with a pair of vise grips with a week pump it should stall// but not sure.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
New User
Joined: Nov 2004
Posts: 6
Likes: 0
Possible fix for fuel pump issues.
I had a problem with a poor connection inside the tank on my 89 where the electrical wires pass through the plate that holds the sender/fuel pump assy. The ring terminals on the bulkhead studs was loose and oxidised. Simply drilled out the stud to remover the terminal, then crimp on a new ring end. I went to the local hareware store and got brass machine screws, nuts and small orings to seal the screws passing through the mounting. Drill the plastic insulator so the new screws will fit through. Put the ring end on the screw followed by a oring. Place the screw through the plastic insultor and tighten nut down. The screw can then be cut to match the lenght of the other brass studs. Put some dielectric grease on the terminals and snap the wiring harness back on. I bought the truck for a song as the previous owner could not figure out the problem. Startes every time now and runs like a dream. One word of caustion, the tank is notorious for rusting under the straps. My tank sprung during this operation but the are avaliable for about $100 repopped. Later and I hope this helps. PS the antiroll over switch trhat is mounted under the carpet is also a source of problems. If you have no power back by the tank. Try TEMPORARILY by passing it My freinds ranger had this problem. DR.
Last edited by EVILFORDDR.; Dec 10, 2004 at 12:21 PM. Reason: 1 more thing.
New User
Joined: Nov 2004
Posts: 3
Likes: 0
I have an 88 Bronco II with the same symptoms. I recently discovered at this site (Removed by Admin, do not place links for spam on FTE) that it could be the Thick Film Intigration (TFI) ignition module causing the problem. There is a guy on e-bay selling these modules for 24.99 + 5.00 S&H, he said he had plenty in stock. Mine is in the mail and I will post latter if that is the problem. Just thought I would throw this out there.
Last edited by IB Tim; Mar 25, 2008 at 04:00 PM. Reason: [url]http://www.tfisettlement.com/[/url]
Thread Starter
|
Junior User
Joined: Dec 2004
Posts: 90
Likes: 0
B2 no-start
ALright when my b2 has a no-start i can not get under there to test the eletrical wires, it dies 99% of the time on very busy roads and often in the morning! around 7:00 am and 8:00 pm. i dont know could the computer have a problem in it & how would i pull codes if i dont have a code reader and cant afford one! i have a older electric fuel pump i would like to know if i can remove the low pressure (or disable it) pump and put the other pump on the fuel system... know what i am asking is can i disable the in tank fuel pump, put in another good fuel pump on the side of the fram rail or something like that and then have it run to the high pressure pump for the fuel system.can that be done with out removing the tank from the b2?