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Old 10-09-2012, 10:56 PM   #1
Cory51191
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SOLVED! Needed new spark plugs. One of the plugs were cracked on the porcelain portion of the plug. The other plugs had bad gaps. One was gapped at .040 and the others were close to it.
I also tested the ignition coils while they were out. They were all fine but the one on cylinder #4 had a bad connection. It was clipped on uneven so I cleaned the connection with MAF cleaner and zip tied the clip so it holds properly.
Thank you everyone for the help and advise.

I did the resistor mod to get rid of my o2 sensor CEL for a sticker and haven't taken it out and plugged the sensor back in. That was about 2 days ago and now my 02' WRX is hesitating real bad at 4k rpm.

Not sure if this is the cause but I was wondering if this is safe to run or not. Thanks.
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Last edited by Cory51191; 10-12-2012 at 01:15 PM.
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Old 10-09-2012, 11:38 PM   #2
Cory51191
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Took the resistor out. Nothing changed.

The nipple on the intake (after the MAF) was loosely attached to the other rubber hose so I put hose clamps on each hose (securing them to the smaller metal connector that was inside of them. Assuming this is why I was getting my EVAP system leak code because the smell of fumes went away while at WOT.

This was after the problem started though (earlier today).
I was bringing my girlfriends sister to work and it was her first time being in the car so I gave it some juice to scare her lol.. But on my way back from dropping her off is when I first encountered the hesitation.
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Old 10-09-2012, 11:45 PM   #3
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Maybe while I was examining the nipple I could have torn it a little bit? I was being a little rough with it since its in such a tough spot to access but even if there was a small tear could it cause such a big problem? And I also noticed the MAF sensor is in very loose because of the poorly made flange on the intake pipe.. But it's been like that since I bought it so I don't think all of a sudden that'd cause the problem.
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Old 10-10-2012, 12:34 AM   #4
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could be a dirty or bad MAF sensor. take it out and spray it down with MAF cleaner. it may just do the trick.
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Old 10-10-2012, 12:44 AM   #5
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Quote:
Originally Posted by zashoe
could be a dirty or bad MAF sensor. take it out and spray it down with MAF cleaner. it may just do the trick.
Can this problem arise so quickly like that and be something so simple though. The sensor was browning on the sensor wire a little though. Not sure if that's normal.
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Old 10-10-2012, 02:27 AM   #6
zashoe
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i'm pretty sure that's not normal. it's possible that it just went kaput. the cleaner is like $7, but that's a lot cheaper than replacing a potentially good MAF sensor.
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Old 10-10-2012, 03:28 AM   #7
Andrewxxcarlson
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The sensor wire you're seeing isn't what measures the airflow. That's the intake air temp sensor. Swap out MAFs with a buddies subie and see how it goes.
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Old 10-10-2012, 09:29 AM   #8
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What's the actual code? Confused to why you would do the resister to the o2 when you have an evap leak...

Also I think you need to look into a tune asap with those pinks
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Old 10-10-2012, 10:43 AM   #9
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Quote:
Originally Posted by J.Gibbs
What's the actual code? Confused to why you would do the resister to the o2 when you have an evap leak...

Also I think you need to look into a tune asap with those pinks
I had an EVAP leak code and an o2 sensor code. P0457 is the EVAP. Don't remember the o2 code.
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Old 10-10-2012, 11:07 AM   #10
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So on my way to work it didn't do it in 2nd or 3rd gear (it doesn't happen in 1st).. Then when I got in the parking lot, it did it in 2nd again. So I guess it acts up when it wants to. I was finding a few things when I did research about a bad ground? But why would the ground be bad all of a sudden. Could it be the coil pack? Any idea on a part that would quickly give out then have a mind of its own?.. Looking in the aisles for MAF cleaner...
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Old 10-10-2012, 01:02 PM   #11
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Either way you should fix your maf if its loose and all your other air leaks if your car is getting un-metered air, then you are gonna be running lean. N if you have pinks n no tune n a few other things here n there then your poor car has no idea what to do. This car was modded n then put close to back to stock for you to buy correct? If so go get this thing looked at and tuned ASAP. And in the mean time don't beat on it.
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Old 10-10-2012, 01:13 PM   #12
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Quote:
Originally Posted by yotasteak569 View Post
go get this thing looked at and tuned ASAP. And in the mean time don't beat on it.
best advice ever!
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Old 10-10-2012, 02:16 PM   #13
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Quote:
Originally Posted by J.Gibbs

best advice ever!
Do you have Mark the shark's number? I would hate to go to Bren Tuning and get the bad news that they can't tune it and pay for the tune anyways. I should probably get an AFR gauge in the mean time. Any suggestions in one? AEM would look nice next to my TruBoost.
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Old 10-10-2012, 03:09 PM   #14
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And this morning the boost gauge did flutter at one point. Went from 11psi (building boost) and shot down to 5psi.

Vacuum reads 18 while at idle.
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Old 10-10-2012, 04:14 PM   #15
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Last time I got gas it was at Unified Petroleum. Maybe that can do it?
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Old 10-10-2012, 04:16 PM   #16
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Was it premium?
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Old 10-10-2012, 05:01 PM   #17
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Quote:
Originally Posted by J.Gibbs
Was it premium?
Yes it was.
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Old 10-10-2012, 05:06 PM   #18
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Quote:
Originally Posted by J.Gibbs
Was it premium?
Yes it was.
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Old 10-10-2012, 05:13 PM   #19
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lol EVAP leak is usually either a loose gas cap or a bad gas cap...check to see if the seal is chewed up...if its loose..clear code at ur dealer, or tuner..or reset ur ECU
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Old 10-10-2012, 05:16 PM   #20
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and which bank is ur o2 sensor fault?
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Old 10-10-2012, 05:28 PM   #21
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Quote:
Originally Posted by Cory51191
Last time I got gas it was at Unified Petroleum. Maybe that can do it?
I get gas there almost every time I fill up, never had any problems. The best thing to do is have someone pull a log and get a better idea as to what is going on. Baby it until you get that done as has been said
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Old 10-10-2012, 05:35 PM   #22
Cory51191
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Quote:
Originally Posted by Wills03rexwagon
lol EVAP leak is usually either a loose gas cap or a bad gas cap...check to see if the seal is chewed up...if its loose..clear code at ur dealer, or tuner..or reset ur ECU
It's not the EVAP I'm worried about anymore, its the hesitating and bucking when it heaitates.. I'm almost positive I fixed the EVAP code. Just have to wait for emissions to be in readiness mode.

It said circuit bank high.
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Old 10-10-2012, 06:41 PM   #23
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Quote:
Originally Posted by space0monkey

Baby it until you get that done as has been said
Does anyone that goes to the meets run Tactrix? Or something that could get a log
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Old 10-11-2012, 01:13 AM   #24
Wills03rexwagon
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a massive evap leak could be the cause of ur evap canister to go outta wack and cause ur hesitation or stumbling issue
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Old 10-11-2012, 01:15 AM   #25
Wills03rexwagon
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also if ur MAF is bad, it causes ur A/F ratio meter to fail or not work at all, just some ideas for you
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