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Old 02-11-2015, 09:47 PM   #1
Scooby Newbie
Member#: 412534
Join Date: Feb 2015
Default Hi everyone.

Hello to all, I'm new to this site and could use all the helpful information. I've been having some issues with my 2002 subaru impreza wrx with a 4eat transmission and 210,000 miles on it.

The transmission was replaced about 20,000 miles ago but the engine I believe is still original. I've done basic maintenance on it regularly, Changing oil, filters, etc but it hasn't had a tune since I got it 2 years ago, mainly for some money troubles I was going through.

About 2 weeks ago I started having an idling issue which threw a code p1507 idle air control malfunction. I pulled the iacv off and it was pretty gunked up so I tried to clean it but unfortunately it didn't help so had to buy a new one. After I replaced it that fixed my issue and actually fixed 2 other issues. I was also having a problem with revving it. It would rev up fine but when coming down it would almost stall before settling to its idle set point. Also when driving I would be slowing down from around 45 it wouldn't downshift smoothly. Not horribly but it felt like it almost hesitant and would shake slightly. I thought maybe it was normal because I've never really driven an auto before to much.

when I replaced my iacv I also cleaned my MAF and removed my inercooler and cleaned the throttle body. Those were Really the only things I did and not only did my car run better it solved the almost stalling issue and the transmission downshift. After that it was smooth and i couldn't really even feel it downshifting. That lasted about a week now the issue has returned for the transmission and the stalling. So I'm wondering if my issue for those 2 things could be because of my maf going bad?

I'm definitely a newbie when it comes to working on cars but I'd love to learn all that I can so any input would be great. If I can resolve the issue before I take it to be tunned that would be great. There are no mods as far as I know. Also I'm taking it in to be tuned no matter what. This is just something I'd like to troubleshoot for experience. Thanks!

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Last edited by nwrider88; 02-11-2015 at 11:29 PM.
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Old 02-11-2015, 10:17 PM   #2
Newbie Moderator
Member#: 91347
Join Date: Jul 2005
Chapter/Region: NESIC
Location: Dublin, Ireland
'13 XV Crosstrek,
1050 Triumph Speed Triple


Paragraphs. What are they?
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Old 02-11-2015, 10:43 PM   #3
Scooby Newbie
Member#: 412534
Join Date: Feb 2015

What are they? Also how do I fill in my profile? I can't seem to do it through the app or the website through my phone.

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Old 02-12-2015, 11:26 PM   #4
Scooby Newbie
Member#: 413310
Join Date: Feb 2015
2006 STI GDB EJ207


nice to meet you!
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