I'm pretty new to this so bare with me.

I originally bought my 350z with a turbonetics single turbo already installed with the utec system. (I got a great deal so I decided not to buy a stock and do it myself). The owner said it needed a new tuning because it had a problem.

The problem being that every once in a while you would stop and when you tried to start going again the car just hangs at 3000 RPM, you then can turn it off, wait 30 seconds, and then drive again with no problems.

I went to go get it tuned and the guy said that this was happening because the Stock ECU would randomly reset the utec map settings back to default causing this to happen. He went ahead and tuned it and everything ran great for the rest of summer and till just recently when the temperatures dropped to below freezing (I live in TX). Now the problem has started to occur again, just a little less frequently.

Is it possible that the ECU is resetting the utec causing it to have this problem? Or is it just the sudden drop in temperatures? (which I would think would make it run better).

Sorry if this is a stupid question, but no one I've talked to has really been able to help.

-xBrad

 

1. ditch the turbo system lol 2. if your going to keep it, go and get uprev... problem solved

 

Why ditch the turbo system?

but I'll check into it thanks.

 

the stock ECU does nothing with the UTEC. The UTEC has 100% control over fuel/timing in open loop (boosting). In closed loop, the stock ecu has control (vacuum). They are separate units.

So is this hang at 3000 rpms when you are on boost or not. Your temp corrections need to be setup in the UTEC, but the basic ones it comes with are pretty good.

 

/\ +1 Assuming that the Utec is tuned using Speed Density. Your tuner is telling you Bull$hit about ECU reseting your tune. Who's your tuner? Do they have experience with Utec?

 

AWD Tuning, I don't think he had experience with Utec though.

 

Do the SLIP and VDC lights come on solid when this happens?

 

If you were fine until the temp went below freezing then you need to make adjustment on your temp compensation table in Utec. If you dont know how to do it then you need to go back to him so he can change it.

 

No, they do not come on solid or at all when this happens.

Okay, I will check into this, thanks.


What's yalls opinion on UpRev? (or other EMS's)