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Old 03-21-2013, 02:18 PM   #1
2004Roo
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Exclamation Loose Gas Cap Check Engine Light/other issues HELP!

Hi everybody. I have a 2004 Stage 2 WRX and have never had any issues with any mods. A few months ago I installed the Perrin Turbo Inlet along with an STI intercooler. Since than my check engine light keeps saying the gas cap is loose. Also, (and this is the real issue) whenever I pump gas It does not start right away. It cranks a few times and usually around the second crank is when it starts. It Idles terribly for about 60 seconds before it goes back to normal. It is REALLY annoying. I've had a few suggestions and have done a few more things to try and fix it. I have installed the following to try and fix it:
Walbro 255 Fuel Pump
Brand new Fuel Filter
Even bought a new Gas Cap from a local Subaru Dealership

I have switched on my AP a few times from stage 1 to stage 2 and no luck.
Any Suggestions?
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Old 03-21-2013, 02:29 PM   #2
SilverBOXER4
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Try cleaning you maf sensor. Bad maf sensor will cause hard to start and rough idle or even stall. It can also throw a false code. That would be my guess. I wonder if your local auto part store can diagnose this for free.
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Old 03-21-2013, 02:37 PM   #3
2004Roo
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Thats the first time I've heard of that, what the heck it couldn't hurt. I'll be sure to clean off that sensor after work. Was also thinking of going to a tuning shop around here if I have no luck even though I'm sure they'll charge an arm and a leg. Thanks dude!
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Old 03-21-2013, 02:41 PM   #4
SilverBOXER4
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When you said you change out your inlet pipe that's what gave me the idea that you could've tampered with the maf sensor. Good luck
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Old 03-21-2013, 02:45 PM   #5
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Quote:
Originally Posted by 2004Roo View Post
I have installed the following to try and fix it:
Walbro 255 Fuel Pump
Brand new Fuel Filter
Even bought a new Gas Cap from a local Subaru Dealership

I have switched on my AP a few times from stage 1 to stage 2 and no luck.
Any Suggestions?
Stop throwing parts at something you haven't diagnosed.

Retrace your steps involved in the latest change. Double check everything, including (but not limited to) vacuum lines that may be disconnected (blue vac T behind alternator) or installed in the wrong position (CPC solenoids).
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Old 03-21-2013, 02:54 PM   #6
2004Roo
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I figured the fuel filter should be replaced anyway and the fuel pump upgrade was in my list of things to do so I just figured/hoped those would resolve it. Good pointers though I'm wondering if I may have rushed the install and left something loose or just unhooked. I'll be sure to retrace my steps and hopefully see what's going on. Turbo Inlet upgrade should not cause these issues so something was altered for sure. Thanks alot!

Quote:
Originally Posted by SpamBot View Post
Stop throwing parts at something you haven't diagnosed.

Retrace your steps involved in the latest change. Double check everything, including (but not limited to) vacuum lines that may be disconnected (blue vac T behind alternator) or installed in the wrong position (CPC solenoids).
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Old 03-21-2013, 03:02 PM   #7
stop_rallytime
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Just go to a shop and get raped cause if you never heard of cleaning a maf then you have no clue about your car. Sorry by the way a couple months and you just now you have an issue with it? Turbo = pain in the ball sack
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Old 03-21-2013, 03:48 PM   #8
snobordboi
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If your gas cap is clicked properly, try checking the wiring to the charcoal canister behind the RR wheel. About 12 inchs back up the wire is a connector that water gets into and corrodes. Solder in some new wire, ecu reset, and you're golden.
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Old 03-22-2013, 08:44 AM   #9
CrashTestRacer
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You knocked a hose loose to the little blue tee behind the alternator. That will fix the "loose gas cap".

Your idle is another problem.
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Old 03-22-2013, 10:20 AM   #10
wrxlaunch
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Quote:
Originally Posted by CrashTestRacer View Post
You knocked a hose loose to the little blue tee behind the alternator. That will fix the "loose gas cap".

Your idle is another problem.
This or replace the part looks like a diverter valve but ita jus a small plastic piece with vac lines attached

http://i38.tinypic.com/4h7i34.jpg

Part to be replaced has blue T attached.

Last edited by wrxlaunch; 03-23-2013 at 03:48 AM.
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Old 03-22-2013, 01:57 PM   #11
art@grimmspeed
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Quote:
Originally Posted by CrashTestRacer View Post
You knocked a hose loose to the little blue tee behind the alternator. That will fix the "loose gas cap".

Your idle is another problem.
This is where I would start as it could cause both issues.
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Old 03-22-2013, 03:03 PM   #12
greenplates
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Tune up, bro. Read up on here and find a few good things you can clean/maintain.

do this often
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Old 03-24-2013, 06:39 PM   #13
2004Roo
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Quote:
Originally Posted by chris@grimmspeed View Post

This is where I would start as it could cause both issues.
Think this may causing the issue?? I will check on that and post whether or not that resolves those issues. Thanks!!
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