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Old 11-07-2011, 02:49 AM   #1
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Exclamation Noises in trunk ?

03 Bonneville SLE , sounds like fuel pump kicking on and off , but it is like it will run for a few seconds and then shut off sorta like it primes up aand won't kick back on until needed , is this correct ?

kinda sounds like a air compressor kicking on on a car with air ride suspension .

In past experiences when the fuel pump is loud is is getting ready to go out , Thoughts ?

Thanks !
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Old 11-07-2011, 08:01 AM   #2
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when you turn the key on the pump primes then shuts off. after you start the car it should run continuously. if its not, likely culprits are the ground, or the connector being bad by the tank. you should probe the wires after the connector to see if your power and ground are getting through the connector.
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Old 11-07-2011, 08:27 AM   #3
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Thanks , I guess I should have mentioned the car runs fine , starts every time just setting there idle you can hear it kick on and off and driving around 15 to 20 mph you can hear it kick on and off not sure it is fuel pump thats just what it sounds like , even at hard acceleration the car never misses a beat so it is deff not starving for fuel I just feel if this is the pump it is louder than normal, thanks
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Old 11-07-2011, 09:12 AM   #4
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Are you sure it'* not an air compressor? Does your car have automatic ride height control? If not, its the fuel pump. When you turn the key it starts up, reaches pressure and shuts down until you start the engine. You probably don't hear it with the engine running.
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Old 11-07-2011, 09:18 AM   #5
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you have a point , it may have god i hope not , i have a 95 town car right now that is about a inch off the ground it is in the shop getting converted to springs and shocks instead of air bags , but this is what it sounds like ill check further thanks a bunch didn't realize they put this on Pontiac as well
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Old 11-07-2011, 09:32 AM   #6
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One sure sign of having ELC is pop the trunk and look where the latch striker is. If you see push button and a Schraeder valve, you have ELC.
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Old 11-07-2011, 11:44 AM   #7
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sle should have it, it sounds like yours is on more than normal though. mine only ran when i first started it then only if i added more weight. if you have the original struts on the back sometimes they start leaking around the rubber part
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Old 11-07-2011, 03:18 PM   #8
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I did a lookup on your car at O'reilly Auto Parts and it shows air shocks are available for the rear end. It'* most likely they're worn out and leaking air used to level the ride. When the back end sinks down the pump has to come back on to level it again. Pull your rear tire and look at the shock, if there'* a small hose connected to it, it'* an air assist. I wouldn't bother converting them to spring, since the air servers a handy purpose, and the replacements from Monroe are $75 for the whole back end. I just put these on my 03 park ave and it rides incredible, the pump even comes on less. They're pretty easy to replace, just 3 bolts, and be sure to use get a $5 tube of blue thread lock, when you put them back together.

http://www.oreillyauto.com/site/c/se...lle&vi=1410961
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Old 11-07-2011, 03:24 PM   #9
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Here'* what an air shock looks like


And here'* how I supported the spring when I took the old shock off. The shock limits the suspension travel so nothing breaks from the spring over-extending the suspension.
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Noises in trunk ?-fd7f3d.jpg   Noises in trunk ?-sm97vk.jpg  
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Old 11-07-2011, 06:05 PM   #10
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thanks a bunch for the pics that was a big help
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