I pulled the fuel pump fuse, started the car and it ran for second then died which is good. It depreasurizes the system. I put the fuse back in and changed the fuel filter.

Go to preasurize the system like we normally do before starting the car and I don't hear the normal hum from the fuel pump. Turn the key and the car won't start.

So I check the fuse and it looks good. I even try putting another fuse in it's spot in case the fuse is blown. I still don't get the hum and the car won't start.

What is the deal. Something as quick and easy as fuel filter change should not cause a problem. What could it be? It's not the fuse and all the connections are perfect.

Should I remove the battery cable for 5 minutes to reset?

Edit: The car runs. Everything is OK! Fuse had to be moved over 1 set of prongs.

 

you may have to cycle the ket a couple times to build fuel pressure back up.....just double check your connections and the fuse.....

 

I have cycled it about 5 times. The problem is I don't hear the hum from the fuel pump so it's not preasurizing. The connections are perfect. I just don't get why the fuel pump would stop working.

I disconnected everything a second time and no fuel came out of the lines when I disconeected the 2nd time. That means the fuel pump isn't turning on. Why is that when the fuse is good and all connections are 100%?? I don't get it man.

 

if u took out ur fuse and r putting back in i did that and my mechanics teacher put it in the wrong way so that may be the problem... i dunno but it worked for us. just switched it around and see whats going on

 

well, I guess you could check for power to the pump.....if you have a test light, it should be the big grey wire coming off the connector of the fuel pump....if you have power there and no fuel coming out, then most likley the pump is dead....also, you could disconnect the feed line before the filter, see if you have fuel coming out there??

 

You know what I think you may be on to something.
That fuel filter was a ****** f'er to get off. When I was pulling it out it kind of came off fast. I may have disconnected wire or something. I'll go check that grey wire.

It's got to be something with the fuel pump.

And thank you loco-performance. I did try it both ways and nothing...

 

good luck....also, make sure you hooked up the right lines to the fuel pump and didn't switch them around.

 

Not to be a dick but, It is in the the right way?
There is a directional arrow on it Im sure.

 

No all the lines are in the right way. I never had to even touch the fuel pump. I don't know.
I just checked all connections. Everything is good. No fuel pump though.

You can't mess up connecting the lines to the filter. They have different size lines so they only fit into one connection. The fuel pump isn't huming. I need to figure out why. The fuse is fine too.

 

you will need a test light or some way to tell if there is power on the circuit.

 

Thanks man. A buddy of mine has a test light.

So it's the grey wire coming off the fuel pump. Where exactly is the fuel pump located?
I didn't even have to touch it for the fuel filter change but I will check and see if it's getting power. Thanks

 

the fuel pump is on top of the fuel tank...but there is a harness coming out from the tank and there should be a plug up under there to the right of the fuel filter...there should be a grey wire in that harness....tap into that with the test light and turn the key on, if you have power there and no fuel coming out then the pump is bad....if you have no power there, you have to find out why you don't have any power....you can use the test light and check by the fuse, make sure there is power there.

 

OK man sounds good. I'm going to try in the morning. I can't see anything right now.

I'll mess with those connections. +rep for the help.

 

dude i did the same **** when i put injectors in

i pulled the fuel pump relay under the hood and put it in 1 pin over so it was still an open circuit

look at the diagram on the box ull see the relay goes right next to the fuse not a pin over
if im right u owe me beer

 

I think you put the fuse/relay(whichever you took out) back in wrong. I seriously doubt you disconnected the wiring to the fuel pump anywhere. The easiest way to get to the pump is to pull out the back seat. There's an access panel under it that opens right to the pump. Check it if you want but I doubt you'll see any voltage.

The only other thing I can think of is you broke a line when you were yanking on everything, but I'm pretty sure you just put the fuse in wrong. Look everything over carefully.

 

According to the Haynes manual Chevy Cobalt & Pontiac G5 2005 thru 2007, this is a direct quote:

On most vehicles, the fuel pressure is relieved by starting the engine and then pulling the fuel pump fuse or relay, which disables the fuel pump and stalls the engine. However, the manufacturer does not recommend this method because it might set a Diagnostic Trouble Code (DTC). Instead , it recommends that you relieve system fuel pressure by draining off the residual fuel through the Schrader valve on the fuel rail.

So I am willing to bet you threw one of these codes:

P0451 - fuel tank pressure sensor range or performance problem
P0452 - fuel tank pressure sensor low input
P0453 - fuel tank pressure sensor high input
P0454 - fuel tank pressure sensor, circuit intermittent

P0461 - fuel level sensor, performance
P0462 - fuel level sensor, low voltage
P0463 - fuel level sensor, high voltage
P0464 - fuel level sensor, circuit intermittent

If you do not have a scan gauge or OBD II then just disconnect your negative battery cable for about 10 minutes and that should clear all codes and you should be back up and running.

Hope this helps

 

I will check that again. If that works I do owe you a beer.

Thanks man. I didn't know about that access panel. I will check that thank you.

Interesting info. I followed the how to and it said pull the fuse and start the motor.
I have an aeroforce but there is no cel. I check for codes either way in the am.

If all else fails I will pull the negative and reset.

 

The scan gauge may not show a code because you were not able to start the car. I always throw that code that disables the cruz control. I could not set it one day and took a look at my scan gauge and there was no code shown for some reason so I just disconnected the battery and wallah the cruz was back on again.

hope yah get her running.

Cheers

 

Thanks Kaisoboy.

 

No problem. keep us posted and I'm sure we will get her going. I do agree though that you should make sure your relay is inserted right. Maybe take a picture so we can see what you have done and we can check placement of our relay to make sure. I have done something similar where i swore i had the part inserted right but a friend noticed i installed it wrong.

cheers! I'm off to a meet. It's getting bloody cold out but everyone here decided to meet up. BBBBBUUUUUURRRRRRRR!!!!!!!

I will check back later.

 

I'd also say, try pushing down on the whole fuse block, maybe the connector under it came loose a little when removing/installing the fuse. Just something else to check.

 

good call Joe. when they put my clutch in the could not get my car started so I, the customer went under my hood opened the fuse box and low and behold the starter relay was up a bit and the whole fuse box was not seated fully.

Cheers from the frozen north.

 

When I did mine I had the same problem, pump wouldn't run so it wouldn't start. I made sure the relay was in the right way, not upside down. What my problem was is if you pull the relay out, there should be 4 pins on it. If you look where you can plug it in there is like 6. I had mine in the wrong 4. You will probably get a cel if you try to start it enough times, I did. Just make sure it is in the right 4 and turn the key on, the pump should whine right up and give it about 10 sec and you should be good to go.

 

I bet you put the fuse back incorrectly. It goes as far forward, towards the front of the car, as it can. It might look like it doesn't but it does.

 

She runs folks, she runs! Woohoo

I owe JapEatr some beer, or at least rep. I am going to go through this and give all of you rep. The fuse needed to be moved over 2 prongs. I'm the worlds biggest *******. Thank you so much guys i'm good to go.

You are exactly right Doc.