Marika

2008 Impala LS flex Fuel Engine Question

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Where is the fuel filter. My mechanic says there is none.


If you really want to make people safe drivers again then simply remove all the safety features from cars. No more seat belts, ABS brakes, traction control, air bags or stability control. No more anything. You'll see how quickly people will slow down and once again learn to drive like "normal" humans.

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There is one sort of.....but not like the old replaceable ones. 

It's like a mat and is part of the fuel pump sending unit. Barring any problems (..diesel, dirt in tank etc..) it is suppose to last the life of the vehicle. 

They also no longer have a fuel return line. 

GM service manual fuel system description for 2008 Impala.

The fuel system is a returnless on-demand design. The fuel pressure regulator is a part of the fuel sender assembly, eliminating the need for a return pipe from the engine. A returnless fuel system reduces the internal temperature of the fuel tank by not returning hot fuel from the engine to the fuel tank. Reducing the internal temperature of the fuel tank results in lower evaporative emissions.

The fuel tank stores the fuel supply. An electric turbine style fuel pump attaches to the fuel sender assembly inside the fuel tank. The fuel pump supplies high pressure fuel through the fuel filter contained in the fuel sender assembly and the fuel feed pipe to the Fuel Injection System. The fuel pump provides fuel at a higher rate of flow than is needed by the fuel injection system. The fuel pump also supplies fuel to a venturi pump located on the bottom of the fuel sender assembly. The function of the venturi pump is to fill the fuel sender assembly reservoir. The fuel pressure regulator, a part of the fuel sender assembly, maintains the correct fuel pressure to the fuel injection system. The fuel pump and sender assembly contains a reverse flow check valve. The check valve and the fuel pressure regulator maintain fuel pressure in the fuel feed pipe and the fuel rail in order to prevent long cracking times.

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Thanks so much for help and clarification.


If you really want to make people safe drivers again then simply remove all the safety features from cars. No more seat belts, ABS brakes, traction control, air bags or stability control. No more anything. You'll see how quickly people will slow down and once again learn to drive like "normal" humans.

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Yeah, I think it is like a 'fuel sock' in the fuel tank that has a mesh that prevents anything large from making its way to the fuel injectors.  Self cleaning, as long as they contaminations aren't too egregious (in the tank). 


Chuck

'17 XT5, '04 Bravada........but still lusting for that '69 Z-28

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Thanks everyone for your imput.  My 2008 Impala LS has reached 95,400 miles.  Relatively trouble-free except for a small, pesky stuff that doesn't hinder the drivability of the car.  Today, all four brakes were done, oil and filter was changed, cabin filter was changed (I swear there were mushrooms growing on it) and the parking brake was adjusted.  The mechanic did a great job.  Next visit in a few weeks will be for spark plug/wires and transmission filter. 


If you really want to make people safe drivers again then simply remove all the safety features from cars. No more seat belts, ABS brakes, traction control, air bags or stability control. No more anything. You'll see how quickly people will slow down and once again learn to drive like "normal" humans.

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I remember when you bought it Marika!, it sounds like it has served you well.   Hope you are doing good!


Pre-1995 - DTC codes OBD1  >> http://z-cut.de/US/dtcobd1.html

1996 and newer - DTC codes OBD2 >> http://carprogrammer.com/Z28/PCM/OBD2/On-BoardDiagnosticTroubleCodes(OBD-II).mht

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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32 minutes ago, BodybyFisher said:

I remember when you bought it Marika!, it sounds like it has served you well.   Hope you are doing good!

It has served me well.  A few small glitches that don't hinder drivability though.  I'm doing okay.  Running into some health problems but otherwise, chugging along.  20 years with the same job (working for the attorney) and still living in the same apartment.  How about you Mike?


If you really want to make people safe drivers again then simply remove all the safety features from cars. No more seat belts, ABS brakes, traction control, air bags or stability control. No more anything. You'll see how quickly people will slow down and once again learn to drive like "normal" humans.

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Sorry to hear about your health issues.  I have a few myself.  I think about you everytime I see a Panasonic Lumix.  My son gave me his old Nikon D610 FX digital camera and I am getting to know it, lots of new features, wow.  

It is good to see you.  I think of how dedicated to your cadillac your were keeping your 4.9 going, I learned a lot from your experiences.  

Stop by and say hi when you can, Mike


Pre-1995 - DTC codes OBD1  >> http://z-cut.de/US/dtcobd1.html

1996 and newer - DTC codes OBD2 >> http://carprogrammer.com/Z28/PCM/OBD2/On-BoardDiagnosticTroubleCodes(OBD-II).mht

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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