Possible problem with my UpRev
 

I figured I would start a thread on the problem I seem to be having with my Z. I had the car tuned about a year and a half ago and everything seemed okay but the past couple of months the car seems to be back firing/popping a lot on downshifts (sounds sick but don't recall it ever doing it) and I have really bad throttle lag once I start driving the car for a while. A few of my friends and my local shop think there is something wrong with the tune so its going in tomorrow for a re-tune. I will keep you guys posted but was wondering if anyone has had there car re-tuned due to problems like this.


P.S The shop who is doing re-tune is not the shop he did the original tune.

Have you reset your learned fuel settings? Do you have the cable to do this? I am wondering if a basic ECU reset would help with the fuel settings that the ECU may have learned over the last year... I reset mine once year as well.

Ummmm IDK? LOL. I don't have the wire, it was all done via a laptop on the dyno. Is this something I should mention to my tuner?

I don't need cable to do it.

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Would you like to enlighten us?

When I get to my comp I can. On my phone.

:)

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I think he means to reset the ECU rather than just clear learned fuel settings through Cipher....

U can reset fuel trims using methods on the site below.

http://www.technosquareinc.com/350reset.htm

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That's what I'm thinking. I'm hoping there is something wrong. Sometimes the car feels great other times its junk. I have two examples of this but its hard to mention them on this forum without getting in trouble so I will put it like this.


My Z > Brand new Boxster S

My Z < 09 370 intake only

Try it. And report back

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Car is at the shop now. I will post up info as I find it out.

Cracked and leaking test pipes causing bank1 and bank2 to run improper AFR. Happy that its a problem that when fixed the car will run great but pissed it happen in the first place.

Your F.I. TP cracked? I have the RTPs... so just checking.

Yep. I'm not going to go and start blaming FI. They may have been installed incorrectly or maybe I hit something???? IDK. The car stayed at the shop overnight and I will talk to them today and get more info. I'm happy but pissed.

Good to know what the problem is! Sad to hear it involves busted parts....