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Old 01-05-2013, 07:25 PM   #1
future97obs
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Default 99 Impreza L Wagon Issue-Please Help!!

So just recently my Impreza started stalling out on me, and I can't figure out why. She starts right up strong, but as soon as I put her in gear and ease onto the gas the engine sputters to a stop...Timing belt seems fine and the fuel pump and filter seem to be working properly. Anyone have any ideas that I could check next that could be the issue? Thanks for all the help in advance. Specs and info on the car:
99 Impreza L wagon
225k miles
5spd
EJ223 engine
Full tank of gas
Half full oil level
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Old 01-05-2013, 08:24 PM   #2
Charlie-III
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What happens if you just let it sit running? Does it continue running, does it idle OK??

Any CEL's?

Does it roll freely (engine off, trans in neutral)?

Have you done/have done anything recently?

Did you just get a big change in temperature?

You have the same car as my wife (99 Impreza L wagon 5MT), so I'm very familiar with it.
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Old 01-05-2013, 08:50 PM   #3
future97obs
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It idles for a few seconds and then sputters to a stop. No CEL's from what I can tell(turn key on and off and CEL does not stay on). It does roll freely if pushed/pulled/on a hill, towed it about a mile today from my work to home). I have not done anything to her recently, except check all of the things mentioned in my previous post. It has not been a drastic temperature change, but it has been getting colder/drier outside slightly especially over night.
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Old 01-05-2013, 10:46 PM   #4
future97obs
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OH...I forgot that I had tried to add keyless entry to the vehicle, but did not have a remote to fully program everything. I plugged it all in together just to make sure it all fit, but then unplugged and replaced everything back. I didn't really think this was necessary unless Subaru built in some sort of "security device" possibly? (sorry for the newb question, I am still trying to learn my vehicle.)
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Old 01-06-2013, 08:35 AM   #5
Charlie-III
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OK, so regardless of anything else, you start the car and it won't run long (either sitting there or trying to drive away).....correct?

When it dies, can you start it right back up, or do you have to let it sit?

When you first start it, or do a restart, does it idle OK?

Depending on answers, almost sounds like you're running out of fuel, maybe a weak fuel pump?

BTW, the CEL comes on as part of the start-up to show the bulb works but then goes out quickly. I more concerned if it comes on and stays on.

The keyless entry is not likely an issue, but maybe you have a plug that is now loose and loses connection from the engine shaking on start-up.
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Old 01-06-2013, 09:49 AM   #6
future97obs
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Correct...and when it stops running I can restart it after the engine quits on me. I did check the fuel pump and it seems to pump plenty of fuel up past the fuel filter, but I have a hard time checking the fuel pressure/level after the filter.
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Old 01-06-2013, 03:46 PM   #7
Charlie-III
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Does it idle OK whenever you start & run it??

Granted, it won't run for long, just asking.

Still sounds like a fueling issue.
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Old 01-06-2013, 04:02 PM   #8
future97obs
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Yeah...it idles just fine and strong for a little while and then just drops below 1k rpm ands then sputters to a stop. Could it be the injectors or plugs at all instead of the fuel pump, filter, and lines?
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Old 01-06-2013, 05:37 PM   #9
KelConquer
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It might not hurt to run 1/3 can of Seafoam through your fuel system, pour into the gas tank and it will stabilize your gas and clean out your fuel lines and injectors. Good luck with the fix!
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Old 01-07-2013, 06:29 PM   #10
yarrgh
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When's the last time the fuel filter was changed? how's the fuel pressure regulator?

since it idles ok, it doesn't sound like anything in the spark category.
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Old 01-07-2013, 06:33 PM   #11
future97obs
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Quote:
Originally Posted by yarrgh View Post
When's the last time the fuel filter was changed? how's the fuel pressure regulator?

since it idles ok, it doesn't sound like anything in the spark category.
As far as I know the fuel filter has not been changed. Where is the fuel pressure regulator located? It just started to idle slightly rough today...especially the more and more I try to start and restart it. The spark plugs where changed before I bought the car over this past summer and has NGK wires and everything.

Last edited by future97obs; 01-07-2013 at 06:48 PM.
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Old 01-09-2013, 08:16 PM   #12
neogoten
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Map engine or maf?
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Old 01-09-2013, 08:17 PM   #13
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If maf. Unplug the sensor and see if it runs
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Old 01-09-2013, 08:20 PM   #14
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I got a 99 impreza l ej223. Maf sensor went bad and it would not idle unless i unpluged the sensor. Plugged it back in and it would stall.
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Old 01-09-2013, 08:27 PM   #15
future97obs
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I believe it is MAF as well. I'll try that tonight and see if that works. I bought it with an aftermarket cold air intake with the same stock MAF sensor I believe.
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Old 01-09-2013, 08:31 PM   #16
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Got mine with a cold air as well.
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Old 01-09-2013, 08:34 PM   #17
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It should run with the maf unplugged. But it will be in limp mode. Tell tale for bad maf is to unplug it then plug it back in. If it dies right away bad maf.
Btw in limp mode 3k rev cut
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Old 01-09-2013, 08:36 PM   #18
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But drivable if u dont mind the check engine light until u get a new sensor
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Old 01-09-2013, 08:43 PM   #19
future97obs
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So when you replaced the MAF sensor, it ran just like before?
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Old 01-09-2013, 08:55 PM   #20
future97obs
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I unplugged the MAF sensor and it ran quite well, but it would not idle under 1k RPMs. Under 1k RPMS it would just stall out. Could I just clean out the Cold Air Intake, change the MAF sensor, and put it all back together to have it back to running normal again?
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Old 01-09-2013, 10:30 PM   #21
neogoten
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Might do the trick. Check all of the air intake assembly and make sure it is all put together right. Any air leaks will make a bad idle as well this includes the hoses coming off the intake
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Old 01-09-2013, 10:33 PM   #22
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Btw i had to hold the rev for a bit while mine was unplugged before it would hold idle
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Old 01-09-2013, 10:41 PM   #23
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I replaced mine and reset the ecu and it to a few minutes for the check engine to clear but runs nowand doesnt stall
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Old 01-10-2013, 12:28 PM   #24
future97obs
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Quote:
Originally Posted by neogoten View Post
I replaced mine and reset the ecu and it to a few minutes for the check engine to clear but runs nowand doesnt stall
Ok cool thanks
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Old 01-10-2013, 12:29 PM   #25
future97obs
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Quote:
Originally Posted by neogoten View Post
Btw i had to hold the rev for a bit while mine was unplugged before it would hold idle
Is that with or without replacing the MAF Sensor?
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