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Fuel pressure/fuel pump 2005 Chevy cavalier, 2.2L, 137,000 miles


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cjcosmo
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Dec 12, 2012, 9:31 PM

Post #1 of 6 (2762 views)
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Fuel pressure/fuel pump 2005 Chevy cavalier, 2.2L, 137,000 miles Sign In

Hello, I have a 2005 Chevy Cavalier, 2.2 L, Automatic transmission, with 137K miles.

The problem started when the car died at a stoplight and would not restart. It would crank, but not start. Once I had it towed home, I listened to see if the fuel pump was still running, it was. Next, I checked the fuel pressure, it was getting none.

So, to start, I replaced the fuel filter. While doing so, I once again tested the fuel pump, it was working. So after replacing the filter, it was once again getting pressure, but not starting. At this time, the fuel pump was working.

The next thing I did was replace the fuel pressure regulator...Here is where it gets weird. After replacing the regulator, the fuel pump stopped working.

So now I am stumped. I know the pump only runs for 2 seconds before it shuts off before ignition, but up until I replaced the regulator I could hear it kick on and off in those two seconds...now it does nothing. I have replaced fuses to see if that was the problem, but apparently it is not.

Is there anything else I can try before dropping the tank, replacing the fuel filter, and looking for misfit wires? Or do I just need to take it in, because right now, I am all out of ideas. Please help!


Sidom
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Dec 12, 2012, 10:38 PM

Post #2 of 6 (2717 views)
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Re: Fuel pressure/fuel pump 2005 Chevy cavalier, 2.2L, 137,000 miles [In reply to] Sign In

With fuel pumps you want to use a pressure gauge and make sure it's with in specs....

It's possible for a pump to run but not generate enough pressure to run the engine....






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cjcosmo
New User

Dec 12, 2012, 10:50 PM

Post #3 of 6 (2710 views)
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Re: Fuel pressure/fuel pump 2005 Chevy cavalier, 2.2L, 137,000 miles [In reply to] Sign In

well that's the thing, when the pump was still turning on, there was no pressure, as in no pressure at all. That's why I started with the filter hoping it was just clogged. once I replaced that, It got pressure within specs, but not getting past the regulator. replaced the regulator, fuel pump no longer turns on. I'm wondering what happened after replacing the regulator for the pump to just stop working.


Sidom
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Dec 12, 2012, 10:59 PM

Post #4 of 6 (2708 views)
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Re: Fuel pressure/fuel pump 2005 Chevy cavalier, 2.2L, 137,000 miles [In reply to] Sign In

Ok.....You need to find out what you're missing....

A quick check, give it a couple shots of starting fluid into the throttle body & see if the engine will fire off that. If the engine will run on starting fluid then you have spark. If not then you need to get a spark tester & check spark

Post the fuel pressure readings you got.

You also want to check to see if you've got injector pulse. This will require a noid light..

Also pull the codes....

It's normal for a fuel pump to run for 2 seconds & then turn off. I will only keep running once the PCM seens RPM & in some cases oil pressure....






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Hammer Time
Ultimate Carjunky / Moderator
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Dec 13, 2012, 6:14 AM

Post #5 of 6 (2675 views)
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Re: Fuel pressure/fuel pump 2005 Chevy cavalier, 2.2L, 137,000 miles [In reply to] Sign In

Just so you know, changing a fuel filter alone will never be the sole cause of a fuel supply issue.




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nickwarner
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Dec 13, 2012, 6:38 AM

Post #6 of 6 (2670 views)
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Re: Fuel pressure/fuel pump 2005 Chevy cavalier, 2.2L, 137,000 miles [In reply to] Sign In

To elaborate on that, if your fuel filter is so restricted it can greatly reduce or stop fuel pressure buildup at your fuel rail, it will have substantially damaged your fuel pump. To have 0 pressure until a filter change shows it was deadheaded, which is lights out for it and new pump time. Changing the filter is good routine maintenance to protect the fuel injectors from particles, which is why it is there. It needs to be changed regularly enough to prevent it from being able to strain the fuel pump. That said, it was certainly a good idea to look into it to determine your lack of fuel delivery.




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