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-   -   05 Focus fuel pump going out? (http://www.focusfanatics.com/forum/showthread.php?t=300289)

FleaWannaBe 10-20-2012 01:04 AM

05 Focus fuel pump going out?
 
When I go to start my car and "bypass" accessory on my ignition my car has a very hard time starting, if at all. If I put my ignition on accessory I can hear a odd "noise" coming from the rear of my car, about far back as the rear wheel. The "noise" goes away after 2-3 seconds. If I wait for the "noise" to stop my car would start up. Now the problem is getting worse, even if I let the "noise" go away my car is still having a hard time starting. I remember my dads van doing this and it ended up being the fuel pump. Just want to semi-verify before I buy the part.

Car has about 127,000 miles on it.

Thanks!!!! [wrenchin]

iminhell 10-20-2012 02:02 AM

Does not sound like the physical fuel pump is bad.

The "noise" is the fuel pump. When you turn the key to "on" the fuel pump primes. This takes a second or two.
If you "start" the car the fuel pump still has to prime before the car will start. It will run on lower fuel pressure, just not well.

IIRC there is a TSB for long crank/hard starts that Ford can do. It may help some. It's an ECU reflash and will cost money. How much I can't say. Might be enough that it may be worth looking into an Xcal and custom tune.


But just to cover bases,
When was the Fuel Filter last replaced?
If you don't know or it's been a while, replace it. It's cheap and relatively easy to do. It also rules out 1 possibility.

Do that first and see if anything changes or improves.

FleaWannaBe 10-20-2012 02:38 AM

Quote:

Originally Posted by iminhell (Post 4414477)
Does not sound like the physical fuel pump is bad.

The "noise" is the fuel pump. When you turn the key to "on" the fuel pump primes. This takes a second or two.
If you "start" the car the fuel pump still has to prime before the car will start. It will run on lower fuel pressure, just not well.

IIRC there is a TSB for long crank/hard starts that Ford can do. It may help some. It's an ECU reflash and will cost money. How much I can't say. Might be enough that it may be worth looking into an Xcal and custom tune.


But just to cover bases,
When was the Fuel Filter last replaced?
If you don't know or it's been a while, replace it. It's cheap and relatively easy to do. It also rules out 1 possibility.

Do that first and see if anything changes or improves.

I do plan on replacing the fuel filter first. Even though you say that the actual fuel pump is not bad, just the fuel pump primes, changing the entire fuel pump should fix the problem, correct? Or can I just buy the primes? Really do not have the desire to flash my ecu.

Thanks

#1fordfan 10-20-2012 03:09 AM

search long crank times,you will find plenty of info. common 2005-2007 problem. I haven't had the dealer work on mine yet,but what I have found works most time of the time is turn the key on and wait for the seat belt chime to stop before I try to start the engine.

FleaWannaBe 10-20-2012 03:15 AM

Quote:

Originally Posted by #1fordfan (Post 4414494)
search long crank times,you will find plenty of info. common 2005-2007 problem. I haven't had the dealer work on mine yet,but what I have found works most time of the time is turn the key on and wait for the seat belt chime to stop before I try to start the engine.

Isnt that just avoiding the inevitable? Why not just replace the pump?

iminhell 10-20-2012 03:20 AM

Quote:

Originally Posted by FleaWannaBe
I do plan on replacing the fuel filter first. Even though you say that the actual fuel pump is not bad, just the fuel pump primes, changing the entire fuel pump should fix the problem, correct? Or can I just buy the primes? Really do not have the desire to flash my ecu.

Thanks

Huh?
Buy primes?

Thinking this is over your head and you should bring it in to be diagnosed but,

Primes - When the key is turned to the On position power is sent to the fuel pump, it is on until fuel pressure reaches ~40psi, then turns off. This happens, or should, every time the key is turned form off to the on position.

It's not something you can buy or replace.

#1fordfan 10-20-2012 08:28 AM

Quote:

Originally Posted by FleaWannaBe (Post 4414496)
Isnt that just avoiding the inevitable? Why not just replace the pump?

you can do that if you like,but others have done it and there wasn't much of a difference in crank time. does it crank for a long time EVERY time you try to start it,or just every now and then? my car does it a few times a week,other times it starts right up. does it really bad after being ran for only a couple minutes(like only driving a few blocks,running inside to do something and coming out right away) and not warmed up fully.

whynotthinkwhynot 10-20-2012 09:31 AM

The fuel tank must be removed in order to replace the fuel pump.

I'm not convinced it's the fuel pump just yet. Fuel filters have a 20-30k mile life. If yours has never been changed, then the fuel pump has to work harder to get the fuel up to pressure along the whole line.

One sign of a fuel pump going bad is that it takes more than 5 seconds for the pump to prime the system as Iminhell described. If yours is only on for 2-3 secs, then that's normal. Shorter is better, of course, but most likely your problem is elsewhere.

Starting is probably the hardest thing your engine does- especially cold start after sitting for a few days or overnight. The mix must be rich to start and run until the engine warms up- which takes about 1-2 mins in modern cars. That's why the 05 models had problems starting- the mix was too lean for fuel conservation. If you have a vacuum leak- like the PCV line under the intake manifold, a loose intake manifold, or a bad brake booster- then starting will be even more difficult.

Until you find the problem, you can try to see if this will help make it easier. When you go to start the engine cold, turn the key and let it turn over just a few cranks- like 3, about 1 second of cranking. Turn the key back off, and start again normally. This should richen the mix enough and it will start within 1 second. I wouldn't turn the key off a second time for a 3rd crank if it doesn't fire up. That might cause flooding, and then you'll need to know how to remedy that situation- which sounds a lot like a dead battery.

Just in case- to remedy flooding: key off, press accelerator to the floor and hold, turn key to start and crank until the hear the engine sputter. Stop cranking, release accelerator, and start engine. The engine will not start in "emergency start mode" when you're holding the accelerator to the floor, that gives it the signal not to shoot fuel. Go out and try it if you want to without trying to crank it normally first- it will just crank and crank and never fire. That works on all EFI vehicles I know of.

FleaWannaBe 10-20-2012 01:58 PM

What about then noise I am hearing?

amc49 10-20-2012 06:34 PM

He already told you. The noise is the pump priming up, it happens for 2-3 seconds every time you turn key on. Sounds like a whine or whir coming from gas tank area.

If noisy and you've never noticed it before then it COULD be going bad, getting noisier is a sign of one going bad. Normally the noise is so slight most people never notice it.

It can be erratic, car starts fine for a week and then out of the blue won't once.

Change filter for sure if it's never been done.


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