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Old 09-07-2009, 02:26 PM   #1
cbous1
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Default RPM jump at idle/minor oil burning at front of engine

Hey,
Im new here and new to Subarus. Looking at buying an 05 WRX at a used car dealership...65k miles, 5sp, etc
I drove the car and noticed right away that I could feel the RPMs jump around a little at idle, not so much that i could even see it on the tach, but enough to think maybe there is an issue.

Second issue was that after driving the car (pretty hard) for about 15 minutes, I popped the hood and noticed a faint oil burning smell. upon a closer look saw that there was a small amount of white smoke coming from the front of the block (between rad support and block). It was not alot at all and looked like it could have been a small spill of oil just burning off. I couldnt tell exactly where it was coming from but im assuming the from exhaust manifold. dealer said they just did an oil change and it was probably from changing the filter...

What do you guys think about these issues? Common? Big Problem? Car is a one owner completely stock for a decent price...which is why I am so interested. Any help would be greatly appreciated
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Old 09-07-2009, 02:30 PM   #2
wteGDF
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2005 MmmMM CF....
Unique Starts Here....

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Usually the dealer is very messy when changing the oil and spills on the manifolds and it usually stinks for the first couple days. I would go back and drive it again to make sure this is not another problem. The idling could be due to a vacuum leak or dirty maf among other things.
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Old 09-08-2009, 02:56 AM   #3
cbous1
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thanks, i had the idle issue on 2 05 wrx's i tested so i was assuming it may be pretty common.

also, id just like to point out it was not a subaru dealer, but a small used car dealership
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Old 09-08-2009, 01:59 PM   #4
cbous1
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anyone other input? I'd like to make a decision tomorrow, any help would really be greatly appreciated
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Old 09-08-2009, 02:42 PM   #5
UkNuck
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fyi it's normal for the idle to jump when the a/c compressor kicks in and out (which will happen anytime the climate controls are set to defog - not just when the actual a/c is running)
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Old 09-08-2009, 02:57 PM   #6
cbous1
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i understand that, this was without ac running. Other vacuum leaks that I've experienced would just cause a steady higher rpm, not really the up and down type of thing i felt in the WRX.
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Old 09-08-2009, 03:08 PM   #7
wteGDF
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2005 MmmMM CF....
Unique Starts Here....

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Mine did the up and down issue when I had a vacuum leak in the intake tract. Also they can adjust the idle as well to flatten it out. Just go back and take a look at it again and make sure there is no more oil or smoke coming from the bay. You could ask them to get it washed to make sure that is not an actual engine problem.
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