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2000 saturn LS2, cars runs rough below half tank, checked fuel filter and lines, replaced pump,and it still runs rough at almost exactly half tank, add a little gas and no problem...Driving us nuts, W

Car does not run right after a half tank of fuel, replaced fuel pump and checked filter, runs fine above half tank, what to do next?

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  • Contributor
  • 35 Answers

Try running the car without tank cap & see the results

Posted on Feb 07, 2014

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Posted on Jan 02, 2017

redlinetech0
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SOURCE: I need to find the fuel filter on a 2004 saturn

Check your plugs, check the ign module, test the injectors,take a fuel sample and make sure there isnt water in your fuel, if all these test good perform a compression test. if the compression test fails replace the head. if the compression test is good. check the timing

Posted on May 23, 2009

  • 1 Answer

SOURCE: 1998 Mercury Grand Marquis Fuel Pump Replacement

you can try just resetting the fuel pump switch located in the car

the switch is originally in the car for in case of an accident, however, if changed, chances are you also have to reset it

in my 98 grand marquis, the switch is on the left side of the trunk

Posted on Mar 19, 2009

  • 18 Answers

SOURCE: hesitation, stalling like out of gas

Clogged Catalytic Converter. What happens is as you push down harder on the accelerator you force more gas into the system causing a slightly richer mixture and more exhaust flow is neccessary. The easiest way to look for a clogged cat is when it's dark out take it for a ride causing it perform it's problem look under the vehicle if the cat is literally glowing red hot you either have a clogged cat or an extremely rich fuel mixture.

Posted on Nov 20, 2008

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1 Answer

I have a 2000 gmc sonoma when the gas gets below a half tank its hard to start it will also die while ur driving it and it backfires when you try to start it but only when it gets below a half tank


There is a metal chamber that is in the fuel pick up line about 1/2 way up designed to take the pulsation out of the pump.If the o rings are bad or the pump has been changed (some mechanics take the pulsator out and replace it with fuel line but if they didn't use fuel injection line it will only last like a few months.)
Either way sounds like the tank has to come out.

Mar 05, 2012 | 2000 GMC Sonoma Extended Cab

1 Answer

Its suppose ably had gotten something in its tank.. so we dropped the tank.. and we replaced the fuel pump and injectors but its still running rough tho.. it runs but rough whats your suggestion???


did you replace the fuel filter by chance? If so the lines may need flushed as well depending on what was in the tank. Did the injectors have any buidup of any sort on them? How about the tank, did you find anything in it?

Sep 15, 2011 | 2000 GMC Jimmy

2 Answers

My saturn 2000 ls2 will turn over but it won't start. I checked the air and fuel filters and the fuel pump is working.


check that you have signal at the crankshaft sensor,also check for spark at the spark plugs.

Sep 30, 2010 | 2000 Saturn L-Series

1 Answer

My 1991 saturn has no gas at filter zero gas flow what do i check 1st


First make sure you have lots of gas in the tank, between a quarter and half. Turn the ignition on and listen for a humming or buzzing noise coming from the tank. The fuel pump should run for a few seconds. If there is no noise you will have to check for a blown fuse. No bad fuses, change the fuel pump.
If the pump runs, remove the fuel line from the tank end of the filter and turn the key on for a secoond or 2. If there is lots of fuel then replace the filter. If fuel just dribbles replace the pump.
If you have to work on the fuel pump, make sure the electrical connections are not corroded and are not loose. Also check the rubber hoses at the connection. Sometimes they will go soft and collapse, plugging the fuel line. Make sure you put the fuel lines back on properly. Hope this helps.

Sep 18, 2010 | 1991 Saturn SL

2 Answers

My Saturn LS2 goes dead while I am driving. It can sit for a little while then it will start, but I only get about 2 miles before it cuts off again. I just had the fuel pump and fuel filter replaced. ...


This is probably your crankshaft postion sensor. They go bad on these car. It usually happens after the car has warmed up. It's pretty easy to replace...it's on the front of the engine just below and to the right of the oil filter.

Jul 30, 2010 | 2000 Saturn L-Series

1 Answer

1998 sts wont start unless u hit the gas then it runs rough ..u put it in drive it wont run over 2000 rpms then it dies


Is the gas tank above 1/2 tank now?

A worn / aged fuel pump will fail when it's hot and the fuel level is low (example: below 1/4)

Park your car in a cool area.

Start the car when it's cold outside,

===
Check the engine fuel pump pressure.
===
Replace the fuel pump relay,fuel filter,fuel pump and fuel pump stainer at the same time.
===

Jun 22, 2010 | 2001 Cadillac Sts

1 Answer

Where is the fuel pump on a 2000 saturn ls2


I had 4 saturns, the fuel pump was inside the gas tank on all of them. It is an electric pump and the gas tank has to be lowered to replace it. This has been very common in most cars since about 1990.

Jul 03, 2010 | 2000 Saturn L-Series

2 Answers

My Saturn has been sitting in my driveway for about a year and a half. We just replaced the battery and the fuel filter and when I try to start the car, the engine turns over, starts for a minute, and then...


If the gas in tank is that old you need to drain it. Once you have good new,clean fuel in tank. Turn key to run position,(do not energize starter just want red lights on dash to come on) listen for fuelpump whine. It will shut off. Turn key off.Turn key to run again, listen for fuelpump again. Turn off key again. Repeat this procedure total 5 times. On last time turn key to engage starter. It should build up enough pressure & fuel & start right up.

Jul 01, 2010 | 1999 Saturn SL

1 Answer

Change fuel filter on a 2006 Saturn Vue. V4.


How to Replace a Fuel Filter
DIY & Save up to $123.86 (Complexity: Moderate / Time: 1.4 hours)

Parts:
1. Fuel Filter - $115.14

Tools:
1. 3/8 in. Drive Ratchet - $7.55
2. Hose Pincher - $5.84
3. Flare Nut Wrench - $5.53
4. Flat Head Screwdriver - $3.14
5. Socket Set

Steps:
Step 1
Open the hood and locate the fuel filter. If the fuel filter is not in the engine compartment, follow the fuel line from the tank until the fuel filter is located.
- Tip: Safety Tip:Always wear safety glasses when working on your vehicle. Wear other personal protective equipment (PPE) when necessary, for example latex gloves or safety shoes.

Step 2
If the fuel filter has a clear case, inspect the filter element for dirt.

Step 3
If the fuel filter case is not see-through, remove it from the fuel line. Drain the fuel from the filter into a container and inspect the condition of the fuel.
- Tip: Caution: Before removing fuel lines or fuel related parts, make sure that the fuel pressure is relieved from the vehicle fuel system. To relieve the pressure in fuel injected systems, remove the fuel pump fuse and run the engine.

Step 4
Install the new fuel filter making sure that the flow is in the correct direction. The arrow on the fuel filter is the direction of flow from the tank to the engine.

Step 5
Secure the lines back onto the fuel filter. If applicable, reinstall the fuel pump fuse.

Step 6
Start the engine and check for fuel leaks.

Step 7
Test drive the vehicle to check for a rough running engine, hesitation, or lack of power.


Hope thats help (remember rated this help). Good luck.

Feb 09, 2010 | 2006 Saturn Vue

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