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Old 10-10-2005, 09:26 PM   #1
kingtut12
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Member#: 81123
Join Date: Feb 2005
Location: Louisville, KY
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2002 2.5 WRX BY
RIP 02' 2.5WRX PSM

Default Checklist before a tune...

At one point in time, someone on here had a nifty maintenance checklist to do BEFORE you went to your tune.
I am tuning myself, but am almost out of answers and I am wondering if it isn't mechanical. I have utec and many mods and just when i get AFR's good and no knock - I'll get knock 2 days later in a completely diff. MLP and RPM than I had before. And sometimes it'll be 20-30 knocks!! Then I'll reduce timing or something and the knock is gone - until 2 or 3 days later.

So, hence the checklist , I'd like to comb thru any possibilities of problem one by one.

I have already: changed plugs, replaced front o2 sensor, leak test done professionally, compression test (fine) , oil change, cleaned MAF, cleaned filter, cleaned IACV thingy (replaced gasket too). Took it to Godspeed and had a decent tune (i think).

Problems : rough idle, stalls out, bucking and hesitate past 6k at any TPS. Knocking.

Thanks for any suggestions
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Old 10-11-2005, 10:11 AM   #2
kingtut12
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RIP 02' 2.5WRX PSM

Default

Any ideas? I dropped the car off today to get a complete comb-thru. They're gonna check all hoses and pipes for leaks. They also mentioned my alternator could need attention, hence the stalling.
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Old 10-11-2005, 10:38 AM   #3
x99percent
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Old 10-11-2005, 11:26 AM   #4
Sports Wagon
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What about fuel filter?
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Old 10-11-2005, 11:19 PM   #5
kingtut12
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Quote:
Originally Posted by x99percent

That was it! Thanks.

And the fuel filter's not a bad idea either.
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