o boy do i need help
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Senior User
Joined: Apr 2004
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From: nj
o boy do i need help
1989 ford bronco sitting in front of my house died a few days ago truck was running. turned the truck off and would not start up again. the fuel pumps arent turning on. i tested the relay wires wit a testlight and wen i poke only 3 of the 4 r hot which i guess one is a ground. lol so that would mean that it is ok. but my fuel pumps r both brand new and dont turn on
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Joined: Oct 2002
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From: Medina, Tn.
Have you checked your Fuel Pressure Regulator or EEC Power Relay next to the fuel relay ? Also, check the wiring going to these 2 relays since they are very prone to cause problems. Also, it very well could be your TFI module if it is not the woring to the relays.
Good luck,
Good luck,
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From: nj
all of my relays in that area are new lol. remember lol u cant take the tops off the relay to see if it works. u will just wind up buying a new one. .
the fuel pressure regulator has to do with turning on the pumps?
and another question. where is the tfi module
the fuel pressure regulator has to do with turning on the pumps?
and another question. where is the tfi module
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Joined: Sep 2003
Posts: 436
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From: North Carolina
hey, when my fuel pump went bad, the first thing i did was replace both eec and fuel pump relays then i went on to changing the fuel pump. After that, I went to start up the truck and the pump didn't come on. I was like aww man, thats bad. but then i started messin around and replaced one of the new relays with one of the old ones and the truck started, so that was a tricky deal. Im glad i caught that before i started messing with something else. So u can't just say "They are new, that will fix it"
The regulator doesn't have anything to do with the pump coming on.
The regulator doesn't have anything to do with the pump coming on.
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From: nj
Originally Posted by tigerhawk_212
hey, when my fuel pump went bad, the first thing i did was replace both eec and fuel pump relays then i went on to changing the fuel pump. After that, I went to start up the truck and the pump didn't come on. I was like aww man, thats bad. but then i started messin around and replaced one of the new relays with one of the old ones and the truck started, so that was a tricky deal. Im glad i caught that before i started messing with something else. So u can't just say "They are new, that will fix it"
The regulator doesn't have anything to do with the pump coming on.
The regulator doesn't have anything to do with the pump coming on.
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Joined: Mar 2004
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You could rule out all other problems by starting at the fuel pumps. Did they work at all after you installed them? You could do a check of them by applying power across one and checking the solinoid inside to see if it works...you should be able to hear it working. This might require you taking them out of the truck and checking them on your workbench. Check all related wiring...shouldn't be too hard to ohm across each wire related as they are all easily accessable via a plug almost everywhere. Check all your ground wires diligently. Did you install the right pumps? (not to insult your intelligence, just starting from square 1). Any information as to what you've already checked would help out.
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From: nj
here is the whole story wit the truck. it started out a few months ago wen i was driving with a quarter tank of gas or less it would wanna stop feeding the engine gas. so i thought it would be the in tank fuel pump. so i changed that and it still did it. so then the truck died for the first time in my driveway when i took the inline fuel pump out and checked it on my battery by connecting the wires to the battery terminals and the pump worked fine. so i put it back in and the truck ran fine for a day b4 i noticed it doing that again then. my truck died again so i changed the inline fuel pump and the truck ran fine for a week b4 i noticed the problem. now its ded and the pumps arent turning on. lol i think im just gonna put it together and bring it to a mechanic if i cant figure it out
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Joined: Oct 2002
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From: Medina, Tn.
""Have you checked your Fuel Pressure Regulator or EEC Power Relay....."""
I meant the Fuel Pump Relay but went nutts on the regulator for some reason. My bad. The TFI Module is the main control of your functions other than the computer. It is attached to the distributor and goes bad quiet often. On my 89, I have had it defective at least 4 times. What I do now is replace it every 12 months. I get it from Autozone with LLT and take it back every 12 months for a FREE swap out.
Good luck,
I meant the Fuel Pump Relay but went nutts on the regulator for some reason. My bad. The TFI Module is the main control of your functions other than the computer. It is attached to the distributor and goes bad quiet often. On my 89, I have had it defective at least 4 times. What I do now is replace it every 12 months. I get it from Autozone with LLT and take it back every 12 months for a FREE swap out.
Good luck,
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From: nj
Originally Posted by fcarruth
""Have you checked your Fuel Pressure Regulator or EEC Power Relay....."""
I meant the Fuel Pump Relay but went nutts on the regulator for some reason. My bad. The TFI Module is the main control of your functions other than the computer. It is attached to the distributor and goes bad quiet often. On my 89, I have had it defective at least 4 times. What I do now is replace it every 12 months. I get it from Autozone with LLT and take it back every 12 months for a FREE swap out.
Good luck,
I meant the Fuel Pump Relay but went nutts on the regulator for some reason. My bad. The TFI Module is the main control of your functions other than the computer. It is attached to the distributor and goes bad quiet often. On my 89, I have had it defective at least 4 times. What I do now is replace it every 12 months. I get it from Autozone with LLT and take it back every 12 months for a FREE swap out.
Good luck,
Elder User
Joined: Oct 2002
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From: Medina, Tn.
My truck would just die for no reason. I got stranded 2 times and once this was replaced, it fired right up. For one thing, this thing can deny you spark. You can turn it over until you are blue in the face and your battery is dead but it won't give spark. For less than $30., I qwould give it a shot. Make sure you buy the special removal tool. It is less than $5. and make sure you have a timing light or at least mark your distributor when you loosen it to take this module off. Lok at it positively, if it corrects your problems and you have to take it to someone to set your timing, you saved $$$.
Good luck,
Good luck,
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Senior User
Joined: Apr 2004
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From: nj
Originally Posted by fcarruth
My truck would just die for no reason. I got stranded 2 times and once this was replaced, it fired right up. For one thing, this thing can deny you spark. You can turn it over until you are blue in the face and your battery is dead but it won't give spark. For less than $30., I qwould give it a shot. Make sure you buy the special removal tool. It is less than $5. and make sure you have a timing light or at least mark your distributor when you loosen it to take this module off. Lok at it positively, if it corrects your problems and you have to take it to someone to set your timing, you saved $$$.
Good luck,
Good luck,
Senior User
Joined: Nov 2003
Posts: 325
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From: Hallettsville, Texas
How does it run with 1/2 tank of gas? Does it run better? Did you clean the fuel tanks? Change the filter? Have you checked to see if you are getting gas when you spin the engine over (build up oil pressure)? The reason I say this is because your electric fuel pump(s) are probably wired in conjunction with an oil pressure switch. If you lose oil pressure, your pumps won`t turn on. Your pump may work for a second or two for starting when you turn the key on and then time out. Find the oil pressure switch and put a jumper wire in the connector and turn the key on. If you don`t get gas then, try your relays and pumps. Your oil pressure switch (if applicable) could be going bad too. Can you here the pump kick on/off for a second when you turn the key on?
Senior User
Joined: Apr 2004
Posts: 443
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From: Central Va.
Never seen a Ford truck wired through oil pressure switch EXCEPT Diesals-Also we will not use aftermarket TFI module in our Ford dealership because they fail in record time- WE replace quite a few ststor in dist, and after replacing a lot of TFIs the wire plug it mates with comes apart --TIP if you remove dist to replace stator- index gear at bottom before removing, pin hole is drilled offset! Hey is inertia switch on inside where pass. left foot would kick carpet- used to see a lot towed for switch unplugged.also EEc power feeds fuel pump relay, also check fuse link for meltdown
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From: nj
Originally Posted by horton-racing
How does it run with 1/2 tank of gas? Does it run better? Did you clean the fuel tanks? Change the filter? Have you checked to see if you are getting gas when you spin the engine over (build up oil pressure)? The reason I say this is because your electric fuel pump(s) are probably wired in conjunction with an oil pressure switch. If you lose oil pressure, your pumps won`t turn on. Your pump may work for a second or two for starting when you turn the key on and then time out. Find the oil pressure switch and put a jumper wire in the connector and turn the key on. If you don`t get gas then, try your relays and pumps. Your oil pressure switch (if applicable) could be going bad too. Can you here the pump kick on/off for a second when you turn the key on?