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....

Glad you got it diagnosed at least and it's not something more severe.
Thanks for the info, I look forward to what your tech has to say.

what's the word?

Third day at the shop. The pipes are all fixed but they came across a problem with the dyno so I'm still waiting for them to tune it. If its not done by today the shop is going to have to consider bringing the car to another dyno since I'm leaving for a vacation Sunday night and I want to take the Z. Will keep you guys posted.

Okay so here is what happen. The shop is still having problems with the dyno and basically cant fully tune my car to get the full potential out of the car with the mods. So they did what they could and made the car run safely. The car feels so much better and there is no throttle lag at all. I cant wait till they get this dyno stuff figured out so they can really tune it.

Crazy! Both of them cracked? Did you or the shop take pictures?

Both cracked at the flanges. It was due to the previous shop installing them improperly, not Fast Intentions fault.

Bumping/trolling this. Glad you got the car fixed bud. We have to meet up one of these days, it's been awhile.

I'm probably going to Atco Friday night if you're interested. Planning on leaving work @ 3 (just have to okay it). I know it's last minute, but I'm just throwing it out there.

I will let you know. I find out day by day when I'm working and what days I hae off with this knew job.

Sounds good.