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Old 04-24-2006   #1
fsmcnally
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Help Me Please fuel feed problem

First indication was engine lost power on the highway. After a few minutes on the shoulder lane, a restart was successful. Problem progressed over a week to the point where the was engine cranking but not starting or would start and run for a brief period of 2 or 3 minutes. Replaced: tank to engine fuel filter-no change. Replaced:distributor ignition module-no change. (temporarily lost codes due to battery disconnect) On dash code read- "fuel pump relay faulty"-Replaced: fuel pump relay-no change. Checked wiring harness from inside the fuel tank to fuse panel and under dashboard area, appears OK. Replaced: fuses for fuel pump, injectors, ECM. It is assumed that the oil pressure sending unit 35 psi trigger point is operational. Replaced: in tank fuel pump and strainer-no change. Replaced: the ECM computer and performance chip- no change........Results: "NO" fuel signal to fuel pump, can prime the engine through the induction where the engine will start and run for a short burst. There is fuel in the fuel rails but there is no pressure. Question: what am I missing?
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Old 04-24-2006   #2
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Re: fuel feed problem

Hey, I may be way off here, but there is a fuse (I believe it is a 20amp) that is above the battery, right near the radiator support. It is in a black housing that is bolted to the car (near the battery). I have heard that if this fuse blows, the car won't start, etc. Sorry if I am wrong, but I seem to remember reading that some where. If you follow some of the wires from your positive battery terminal, it should lead you to it. Hope that helps
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Old 04-25-2006   #3
fsmcnally
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Re: fuel feed problem

Quote:
Originally Posted by ZZ4GTAMan
Hey, I may be way off here, but there is a fuse (I believe it is a 20amp) that is above the battery, right near the radiator support. It is in a black housing that is bolted to the car (near the battery). I have heard that if this fuse blows, the car won't start, etc. Sorry if I am wrong, but I seem to remember reading that some where. If you follow some of the wires from your positive battery terminal, it should lead you to it. Hope that helps
Take care
Mike
Hi Mike, thanks for the tip, I know of the location where you directed us to. Will try that. Thank you, Scott
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Old 04-25-2006   #4
ZZ4GTAMan
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Re: fuel feed problem

Yeah Scott, I hope it does help you. Let us know man.
Take care man
Mike
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Old 04-25-2006   #5
Belial
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Re: fuel feed problem

I'm having the same exact problem. Only I replaced the coil and the distributor so far. Then realized that it was actually fuel. (I was getting low spark before.) I'm gonna have to try this. All the fuses under the dash seem fine. I was thinking it was maybe a relay.

Definitely post back if that was the problem because I've been trying to chase this for a week now.
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Old 04-26-2006   #6
fsmcnally
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Re: fuel feed problem

Quote:
Originally Posted by ZZ4GTAMan
Yeah Scott, I hope it does help you. Let us know man.
Take care man
Mike
Hi Mike, PERFECT that did the trick, Thank YOU for taking the time to share your ideas. First clue was when the fuel pump activated with ignition ON. The engine started immediately. Scott
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Old 04-26-2006   #7
Belial
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Re: fuel feed problem

I checked the fuse. It's not blown. Is it possible for it to be an injector relay?
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Old 04-26-2006   #8
ZZ4GTAMan
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Re: fuel feed problem

Hey Scott! great news man! Glad that worked and you got it running.

Take care man
Mike
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Old 04-26-2006   #9
ZZ4GTAMan
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Re: fuel feed problem

Hey Belial, maybe it's your fuel pump, fuel pump relay, or your fuel regulator? If that fuse is good, I would start with the relay first. I believe it is near the brake booster. But I am not 100% sure. If it isn't that, try your fuel reg. or fuel pump. Do you hear the pump when you turn the key on?

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Old 04-27-2006   #10
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Re: fuel feed problem

It's the number 2 injector. Unhooked it and the car fired right up. Replacing all 8 tomorrow night.
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Old 04-27-2006   #11
fsmcnally
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Re: fuel feed problem

Quote:
Originally Posted by ZZ4GTAMan
Hey Scott! great news man! Glad that worked and you got it running.

Take care man
Mike
Hi Mike, we ran the engine for 5 minutes, some tuning now required. The engine does not want to idle and it hesitates when throttle is added. Scott
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Old 04-27-2006   #12
fsmcnally
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Re: fuel feed problem

Quote:
Originally Posted by Belial
It's the number 2 injector. Unhooked it and the car fired right up. Replacing all 8 tomorrow night.
Hi Belial, what tweeked you onto that particular injector? Scott
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Old 04-27-2006   #13
ZZ4GTAMan
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Re: fuel feed problem

Wow Scott, I am not sure. Could be so many things. Have you changed the fuel filter?

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Old 04-28-2006   #14
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Re: fuel feed problem

Had an injector light. The signal was real weak when plugged in, so when I unplugged the 2nd injector, the signal was real strong and the car fired.

I'm actually going to order the injectors online because they're a good bit cheaper that way. Only thing I'm confused on is I hear people have 22lb injectors stock, but I'm reading they really came with 19lb injectors stock. Even on summit's website it's only showing 19lb injectors for a stock replacement. Also, I'm only seeing Accel injectors. I was told to try and avoid them.

Will the ford racing 19lb injectors work? If so, does it matter what year they're for? And do I have to do ecu mods if I use them?

Last edited by Belial; 04-28-2006 at 05:51 PM.
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Old 04-28-2006   #15
ZZ4GTAMan
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Re: fuel feed problem

Hey Guy, I have the Accel #24 LB injectors, and have had no problem with them. I probably have about 10000 miles on them. I believe the 19 LB injectors came stock with the 305 engine, and the 22 LB injectors were on the 350.
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Old 04-28-2006   #16
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Re: fuel feed problem

Yeah that sounds right. As far as brand I have heard bad things about the Accel's but I dont know first hand. AS for the Fords I have always heard good things about them.
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Old 05-06-2006   #17
fsmcnally
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Re: fuel feed problem

Quote:
Originally Posted by ZZ4GTAMan
Wow Scott, I am not sure. Could be so many things. Have you changed the fuel filter?

Mike
Hi Mike, the fuel pump and strainer and fuel filter are all new , just recently been changed. With the new ECU and performance chip itīs possible there is no baseline to work with. Will investigate after the middle of the month.Scott
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Old 05-06-2006   #18
ZZ4GTAMan
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Re: fuel feed problem

Hey Scott, try putting your stock chip back in and see what happens. Let us know what you figure out man.
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Old 05-25-2006   #19
fsmcnally
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Re: fuel feed problem

Quote:
Originally Posted by ZZ4GTAMan
Hey Scott, try putting your stock chip back in and see what happens. Let us know what you figure out man.
Take care
Mike
Hi Mike,
>Tried the original chip, no luck, back to the replacement.
>Checked fuel pressure from tank to fuel rails, all seems OK.
>Replaced the MAF sensor,forum feedback suggested that. No change.
>Disconnected the TPS lead, no change.
>Backed off the TPS set screws and repositioned with engine running, no change.
>Disconnected the IAC lead, no change
>Disconnected the fuel injector leads one at a time and the results were comparible when the engine was restarted each time.

Current situation: engine starts good but won't idle and the throttle needs to be feathered to get RPM increase which it will not maintain.

Any further thoughts? Scott
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Old 05-26-2006   #20
ZZ4GTAMan
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Re: fuel feed problem

Hey Scott, how are you man? Hey did you have this problem before you installed the new chip and ECM? Is it possible that your new ECM is bad? How about your fuel pressure regulator? Is yours stock or an adjustable aftermarket? Maybe that is bad. I wish I knew alot more to be able to help you. There are some real smart guys in this group. Any advice I give in here is from my own trial and error experiences with my car. I know how it is when you can't figure out something on the car. It really sucks. So I always try and help. Earlier in your posts, you said you did change that 20amp fuse that I was talking about (near the battery) and it worked. Is it possible that the fuse blew out again due to a short somewhere? Check that fuse again. How about an electrical issue? Have you checked the coil, module, etc? Keep us updated bro.
Take care & good luck
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