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Old 01-06-2013, 01:58 PM   #1
00SilverWRXSedan
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Member#: 24469
Join Date: Sep 2002
Location: New Jersey
Vehicle:
02 WRX

Default Need advice on my WRX. Heres the situation P304; Rough idle; Cyl 4 @ 90;

Please give me your thoughts on whether I should fix or get rid of my 2002 WRX with 128k. I brought it to the dealership and here's what they told me:

Road test vehicle. Utilize select monitor to diagnose condition, found misfire on #2 and #4 cylinders, removed coil and plugs to perform compression test. Found #2 cylinder at 115 and #4 low at 90. Possible burned valve or damaged piston.
Would need to take engine apart for further diagnosis and estimate.
The mechanic told me that it would cost some where between 2500 - 5000 to repair the issue depending on exactly what needs to be done.
Which do you think is more likely? Should I get another opinion? If not what should i do with the car? Any idea how much the car is worth in its current condition? Note, its doesn't have any dents or anything.

Also I wanted to mention that my car first started throwing the CEL code P304 about a year ago but after spending a fair amount of money trying to fix the issue via replacing the plugs, coil, fuel injector, and motorvac carbonclean service, my mechanic indicated that the compression in the 4th cyl was fine and that the CEL was to be ignored until it got worse or proved to be a false alarm. Over the past couple months the P304 got more frequent until I brought the car in last sat.
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Old 01-06-2013, 06:16 PM   #2
LitRex315
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Member#: 275563
Join Date: Mar 2011
Chapter/Region: Tri-State
Location: CNY
Vehicle:
2011 WRX 5-Door
Satin White Pearl

Default

Worse come to worse you could find a parts car and see what magic you can work.
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Old 01-06-2013, 07:59 PM   #3
Uncle Scotty
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Member#: 16200
Join Date: Mar 2002
Vehicle:
OK Houston
we have an Uncle

Default

it needs a new shortblock......or a valve job

need to do a leakdown test to know which
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Old 07-24-2014, 08:07 PM   #4
2002AZ
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Member#: 296732
Join Date: Oct 2011
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I'm new to the forum but have searched around and this issue is closest to what I am experiencing with my 2002 WRX with 148K. Periodic misfire codes with dealer replacing ignition coils. Dealer didn't help latest round of problem, so an independent mechanic did a leakdown test and showed loss of pressure in Cyl4.

But what do I do now? Should I go back and ask to check the MAF or what ever it is called, and injectors or other things?

If I need a rebuilt engine, where can I get one? I love my WRX but am not a mechanic, just a lady who loves to drive her rally car.
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Old 07-24-2014, 08:44 PM   #5
Uncle Scotty
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Join Date: Mar 2002
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OK Houston
we have an Uncle

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Quote:
Originally Posted by 2002AZ View Post
I'm new to the forum but have searched around and this issue is closest to what I am experiencing with my 2002 WRX with 148K. Periodic misfire codes with dealer replacing ignition coils. Dealer didn't help latest round of problem, so an independent mechanic did a leakdown test and showed loss of pressure in Cyl4.

But what do I do now? Should I go back and ask to check the MAF or what ever it is called, and injectors or other things?

If I need a rebuilt engine, where can I get one? I love my WRX but am not a mechanic, just a lady who loves to drive her rally car.
if it has low compression that means that the engine needs internal work

it is likely going to cost $3500-$6k to get it back to running right

edit...

it IS possible that all it needs is a valve adjustment...but that will possibly cost up to $2k on that car

Last edited by Uncle Scotty; 07-24-2014 at 10:44 PM.
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Old 07-25-2014, 03:26 PM   #6
2002AZ
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Member#: 296732
Join Date: Oct 2011
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Thanks for the quick reply.

So, if the misfire is intermittent (hard for mechanic to replicate), but there is loss of compression in cyl4, does that mean it definitely needs internal work? Or should I run some other tests before retiring this car?

would anyone be likely to buy this car in this condition? 2002 WRX Hatchback definitely the best looking model.
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