AP service bulletin
#1
AP service bulletin
I'm just curious to see the results. Those who purchased an AP and checked for leaks like cobb reccomended what did you find? And for those who don't know about the service bulletin here it is:
http://www.cobbtuning.com/info/?ID=3481
http://www.cobbtuning.com/info/?ID=3481
#6
Evolving Member
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That service bulletin was a direct result of the experiences with my car giving way to us closely investigating all other Evos that have made it in. More often than not, the car has a boost leak. It varies between the bypass valve, injector seals, and throttle body seals, but it is VERY regular to see boost leaks.
A boost leak should be worked into your normal maintenance schedule, being done about every 5k miles.
My method for checking leaks involves a piece of silicone hose, a length of flared aluminum tubing that has been capped off, and a tapped in schraeder valve. The home depot elbow is only good up to about 20psi before it will invariably blow out of the hose.
-Jon
A boost leak should be worked into your normal maintenance schedule, being done about every 5k miles.
My method for checking leaks involves a piece of silicone hose, a length of flared aluminum tubing that has been capped off, and a tapped in schraeder valve. The home depot elbow is only good up to about 20psi before it will invariably blow out of the hose.
-Jon
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#8
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Sorry for my ignorance but im trying to understand exactly where you would connect the test devise. This is what Cobb is saying.
"Simply disconnect the first rubber intercooler coupler from the turbo J-pipe outlet and insert the test device into the coupler"
Is this the hot pipe side? Also which first coupler, the one connecting to the intercooler or the turbo? Again sorry for my ignorance just trying to understand.
"Simply disconnect the first rubber intercooler coupler from the turbo J-pipe outlet and insert the test device into the coupler"
Is this the hot pipe side? Also which first coupler, the one connecting to the intercooler or the turbo? Again sorry for my ignorance just trying to understand.
Last edited by TheEvolutioner; Oct 21, 2007 at 12:40 PM.
#10
We have updated this Service Bulletin to v1.01. The latest versions can be accessed from the various EVO Map Download pages:
Download link for 2003 EVO8
Download link for 2004 EVO8
Download link for 2005 EVO8
Download link for 2006 EVO9
Take care,
Christian.
Download link for 2003 EVO8
Download link for 2004 EVO8
Download link for 2005 EVO8
Download link for 2006 EVO9
Take care,
Christian.
#13
Take care,
Christian.
Last edited by Christian.; Oct 22, 2007 at 02:01 PM.
#14
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DeeezNuuuuts83- Their high flow race cat version will sound nearly identical. If we were to video tape it you would not be able to tell a difference. The cat will quiet things down a pinch (and I mean a pinch) more at cruise and idle. WOT should sound nearly the same. Here is some more helpful info direct from COBB:
COBB DP, COBB Catless Test Pipe, COBB Cat Back
idle - 83dB
SAE - 98dB
COBB DP, COBB high flow Catted Test Pipe, COBB Cat back
idle 80dB
SAE 94dB
Help save the earth and we'll throw you free shipping on both your AP and your EVO Turbo Back Catted. I just read Rob's reply to you after typing this out regarding dB, LOL. Sorry for the redundancy. Honestly, you would not know an audible difference between the 2 unless you had them side by side in person. COBBs high flow cats are amazing to say the least!
CPA5- I'll have more for you on this later today. Short term + Long term fuel trim should = 0 (or close to zero). This number is thrown off when people change out intakes (as is the case with subarus, but I believe this carries over to Mitsu the same).
TheEvolutioner- agreed, that is a popular thing for our Subaru AP customers. Only down fall is peak summer time, I would hid the AP away to avoid extreme heats.
Stephen
COBB DP, COBB Catless Test Pipe, COBB Cat Back
idle - 83dB
SAE - 98dB
COBB DP, COBB high flow Catted Test Pipe, COBB Cat back
idle 80dB
SAE 94dB
Help save the earth and we'll throw you free shipping on both your AP and your EVO Turbo Back Catted. I just read Rob's reply to you after typing this out regarding dB, LOL. Sorry for the redundancy. Honestly, you would not know an audible difference between the 2 unless you had them side by side in person. COBBs high flow cats are amazing to say the least!
CPA5- I'll have more for you on this later today. Short term + Long term fuel trim should = 0 (or close to zero). This number is thrown off when people change out intakes (as is the case with subarus, but I believe this carries over to Mitsu the same).
TheEvolutioner- agreed, that is a popular thing for our Subaru AP customers. Only down fall is peak summer time, I would hid the AP away to avoid extreme heats.
Stephen