tuning needed? - Jeep Commander Forums: Jeep Commander Forum
Exhaust Questions or advice about exhaust systems? This is the place...

 
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post #1 of 6 (permalink) Old 05-20-2010, 10:13 AM Thread Starter
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tuning needed?

I drive a 2006 3.7 XK. 2 months ago I added a K&N CAI and last week I had a magnaflow muffler welded on. I like it so far but the transmission seems to shift with different RPMs. It's almost like it cant decide what to do and shifts much later. I've also noticed a decrease in fuel economy on the read out (not JUST from me revving with the new sound).

I'm just wondering if anyone else has experienced this and what they did about it. I was wondering if maybe I needed the engine to be tuned because of the new "uncorked" flow? any advice would be great because otherwise I may just get the old muffler welded back on.

thanks again,
Allen

2006 3.7 Tan 4x4

K&N CAI, shorty antenna, brush guard with twin Hella 500FF halogens, OEM fog lights (I did it so it's a mod
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), magnaflow muffler, 2" RC


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post #2 of 6 (permalink) Old 05-20-2010, 03:35 PM
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Disconnect the negative battery cable.
Turn the key to the on (not start) position.
Leave it this way for a few minutes.
Turn key off and remove it.
Reconnect negative cable.
Start and let idle for about 5 minutes.
Go for a 15/20 minute drive at varying speeds and throttle positions.

By disconnecting the batt and key on you are taking the computer settings back to base, as if a new vehicle.
Reconnecting and driving it allows it to re-learn and adapt to your modifications.

Rob


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post #3 of 6 (permalink) Old 05-22-2010, 05:58 AM Thread Starter
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awesome. I'll give that a try today, thanks for the tip!

2006 3.7 Tan 4x4

K&N CAI, shorty antenna, brush guard with twin Hella 500FF halogens, OEM fog lights (I did it so it's a mod
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), magnaflow muffler, 2" RC


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Rah Virginia Mil
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post #4 of 6 (permalink) Old 05-22-2010, 08:19 AM
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Quote:
Originally Posted by VMI11 View Post
awesome. I'll give that a try today, thanks for the tip!
let us know how it works , please

2007 Jeep Commander Limited, 5.7L HEMI, Stone White. 2" RC lift with Robby's spacers. Goodyear Duratracs 245/75/17. Magnaflow catback exhaust. AFE Stage 2 Cold Air Intake.
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post #5 of 6 (permalink) Old 05-25-2010, 12:03 AM Thread Starter
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sorry for the delay in response. it worked great. city milage is up by 2 mpgs and I can't give you a good answer for highway but I'm looking forward to the 20s range hopefully . thanks for the tip, worked great.

2006 3.7 Tan 4x4

K&N CAI, shorty antenna, brush guard with twin Hella 500FF halogens, OEM fog lights (I did it so it's a mod
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
), magnaflow muffler, 2" RC


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Rah Virginia Mil
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post #6 of 6 (permalink) Old 05-25-2010, 07:31 AM
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sorry for the delay in response. it worked great. city milage is up by 2 mpgs and I can't give you a good answer for highway but I'm looking forward to the 20s range hopefully . thanks for the tip, worked great.
You're welcome!
Can't beat the price, either.

Rob


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