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Old 11-07-2013, 07:09 PM   #1
nostalgia13
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Join Date: Dec 2010
Chapter/Region: SWIC
Location: Mesa, AZ
Vehicle:
2006 Forester XT 5mt
Silver

Default Help- EGT spikes up to 2200F?!

I just bought this Foz less than a week ago (found it here on NASIOC) and it runs great. The only thing that has me concerned is the EGT gauge keeps giving me outrageously high temp readings sometimes. It seems to be when i get in to a little boost and let off the throttle it will jump up to 2233F. (See video at -http://n0stalg1a13.tumblr.com/post/66319238856/egt-spikes-it-beeps-when-the-gauge-reads-around ---the lighting gets better towards the end of the video)

I'm not exactly sure where the EGT sensor is drilled in to because i haven't had a chance to get underneath the car and look at it. It was installed by the previous owner who claimed to have had a "former subaru mechanic" with him. Here are a list of mods. (From the Sale Posting)

"MadDad Turbo boost + EGT + water temp gauge (dash mounted) + dash pod (3-in-1 gauge) [programmable for alerts and various other things]
MadDad Oil temp gauge - pressure wire ran and ready, just need to install gauge in ashtray area
MadDad Oil pressure gauge - temp wire ran and ready, just need to install gauge in ashtray area

Engine:
Kartboy shifter bushings
STi transmission bushing
Invidia Q300 Catback
snorkus delete
Royal purple diff and trans fluid
New rear O2 sensor

"XTI" Engine Upgrades:
STI turbo (vf39) - rebuilt and factory fresh with warranty
STI intercooler
Helix 3" down pipe with high flo cat, heat-wrapped to keep hood temps down
Walbro 255LPH high pressure fuel pump
Cobb Accessport v2 tuned (Stage 3 VF39) - brand new & included with sale

The "XTI" swap was completed about the 67K mark, so it's only been running at Stage 3 for about 6K miles. Everything that was done on the engine was done professionally and correctly. If any part, gasket, nut, or screw was questionable - it was replaced.
It's been running mobile 1 synthetic exclusively since I got it."
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Old 11-08-2013, 04:15 AM   #2
superdonkey23
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Join Date: Mar 2013
Chapter/Region: South East
Vehicle:
2013 WRX
Crystal Black Silica

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The sensor should be located in the #4 runner of the header. It sounds like a bad sensor. I'm pretty sure if the exhaust really was getting that hot then you would have a whole mess of soft steel after the end of a spirited run.
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Old 11-08-2013, 08:57 AM   #3
Brother EddieJ.
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Chapter/Region: MAIC
Location: frederick, md
Vehicle:
2004 wrx
6speed/ 330whp/ 300wtq

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Bad sensor or gauge.
Melting points here: http://www.engineeringtoolbox.com/me...als-d_860.html
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Old 11-08-2013, 09:59 AM   #4
Leafy
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Location: MA
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2006 WRX
WRB

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That doesnt seem possible. Probably bad thermocouple or wiring.
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Old 11-08-2013, 02:08 PM   #5
nostalgia13
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2006 Forester XT 5mt
Silver

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That makes sense. I'm planning on putting headers and a new up pipe on the car before I have it professionally tuned pretty soon here. Those OTS maps just have me a little paranoid from what I've read here. Is there anything that I should be worried about in the mean time before I get that fixed? (Thanks for the help! I'm pretty new to all of this)
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Old 11-08-2013, 03:17 PM   #6
Andrewxxcarlson
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2006 WRX
WRB

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You're choice of oil is mobile1? Have you noticed any burning toward the end of your oil change intervals? I suggest moving up a weight ie 5w-40. Familiarize yourself with the oils our cars like, it'll save your motor one day.
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Old 11-08-2013, 05:21 PM   #7
nostalgia13
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2006 Forester XT 5mt
Silver

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Quote:
Originally Posted by Andrewxxcarlson View Post
You're choice of oil is mobile1? Have you noticed any burning toward the end of your oil change intervals? I suggest moving up a weight ie 5w-40. Familiarize yourself with the oils our cars like, it'll save your motor one day.
I just bought the car a week ago so that is what the last owner was putting in it.
Thanks for the heads up!!!
I was putting 5w40 in my last wrx because that's what my tuner told me to put in it. I'll be sure to read up on what's best for my baby! -(I've done more reading here in the last week than I did my whole high school career due to said problem)- I don't want any mishaps down the road.
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Old 11-08-2013, 06:03 PM   #8
trev762
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Location: southern ontario canada
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2011 sti sedan
plasma blue pearl

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Quote:
Originally Posted by nostalgia13 View Post

I just bought the car a week ago so that is what the last owner was putting in it.
Thanks for the heads up!!!
I was putting 5w40 in my last wrx because that's what my tuner told me to put in it. I'll be sure to read up on what's best for my baby! -(I've done more reading here in the last week than I did my whole high school career due to said problem)- I don't want any mishaps down the road.
I would also highly suggest getting rid of the royal purple out of your trans and diff.
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Old 11-08-2013, 11:21 PM   #9
Trae32566
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2013 Impreza WRX 4dr
Black

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Quote:
Originally Posted by trev762 View Post

I would also highly suggest getting rid of the royal purple out of your trans and diff.
Yeah, generally if you want something that works well, there are a few good concoctions on here, but personally I'd just grab Redline (I forget which one). Also, look at Redline 5w-40 or 0w-40. It has an amazing HTHS rating (better than Motul 300v), as well as one of the lowest NOACK volatility around. In my 2013 WRX, I actually don't have to add oil at all between fill ups (although you should always check frequently still)
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Old 11-10-2013, 12:37 PM   #10
nostalgia13
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Silver

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Thanks for all the good info. I was putting redline in my wrx because of a similar suggestion from a friend so looks like I'm gunna switch it all out on the foz too!
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