Nissan 370Z Forum

Nissan 370Z Forum (http://www.the370z.com/)
-   Forced Induction (http://www.the370z.com/forced-induction/)
-   -   GTM stage 1 S/C - Throttle not opening fully? Or boost leak? Please help! (http://www.the370z.com/forced-induction/114053-gtm-stage-1-s-c-throttle-not-opening-fully-boost-leak-please-help.html)

fillerbunnie 05-22-2016 06:32 PM

Quote:

Originally Posted by pokeyl (Post 3484571)
Same problem I had it's a bad tune from GTM (sam)

Turn the highlight function to "OFF"

Make this change and all will be well!

http://www.the370z.com/forced-induct...ing-boost.html

http://www.the370z.com/members/pokey...74308-tune.jpg



Ahhhh this looks very promising!! Problem is I don't have P0101 at all :( It's missing from my Uprev rom... Did you have to make any changes to have these options? I don't have the 2 DTC settings for the MAP sensors either :(

pokeyl 05-22-2016 07:47 PM

It will not set the code, trust me, if it did I would not have spent 8 month and 3K USD to find it.

If you do not have that code, look at all the other codes for one with the same name.

Do you have P0106?

You need someone with the same year and Aus make that has a good tune, copy his setting. Good luck

Last check with uprev see if you have the current ROM reader with full access to all the code.

fillerbunnie 05-23-2016 06:52 AM

Quote:

Originally Posted by pokeyl (Post 3484742)
It will not set the code, trust me, if it did I would not have spent 8 month and 3K USD to find it.

If you do not have that code, look at all the other codes for one with the same name.

Do you have P0106?

You need someone with the same year and Aus make that has a good tune, copy his setting. Good luck

Last check with uprev see if you have the current ROM reader with full access to all the code.

I've just grabbed all the Uprev ECU dumps for EU/AUS models (I'm 1EL6B, but I downloaded all the others with the rom editor) - They are all missing 101, 106, in fact all the MAF & MAP performance/range/correlation settings (and a good 10-20 other DTC's) are missing! Nothing similar in name either.

The JDM and US ECU dumps from Uprev have these codes, but the EU/AU dumps don't, making me think the issue is at Uprev's end in not adding these DTC's to the ROM dumps. I've just emailed them asking why they are missing.

My car definitely has a MAP sensor, so I'm certain the codes are built into the ECU... We will see what Uprev comes back with!

fillerbunnie 05-24-2016 04:59 AM

OK, so I disconnected the MAP sensor and the ECU throws P010A. I have no P010B, but I do have P010A,C,D.

With the MAP sensor disconnected, I get full boost followed by crippled performance shortly after. I disabled P010A,C & D, and cleared codes, and with the MAP sensor still disconnected I get the same massive throttle lag...

So I'm fairly sure it is MAP sensor related, but it seems like my ECU probably doesn't have the MAP/MAF performance DTC's at all.

So my question is, how the F*** do I fix this!? I can't disable the DTC because my ECU doesn't have it, the DTC I do have doesn't stop the "safe mode" and leaving the MAP sensor unplugged doesn't help... So depressing!

I guess a better start would be if anyone has definitive information on how the MAP sensor's output is used by the ECU? Is it purely a safety device? I feel like there has to be a magic bullet for this problem, I just don't know what it is...

ANMVQ 05-24-2016 07:33 AM

Who tuned the car? your ECU has to have it somewhere, if it didn't the sensor wouldn't be on the car :/.

Kzonts 05-24-2016 11:14 AM

I thought anyone with FI has a custom tune and only use a canned tune to drive it to the tuner, or use it as a baseline for the custom tune.

fillerbunnie 05-24-2016 05:51 PM

Quote:

Originally Posted by Kzonts (Post 3485854)
I thought anyone with FI has a custom tune and only use a canned tune to drive it to the tuner, or use it as a baseline for the custom tune.

Sorry, I should clarify - It has been significantly modified, but the starting point was the GTM base tune. AFR targets are fine and timing is conservative.

Kzonts 06-06-2016 04:11 PM

Any updates? Curious to know the status

pokeyl 06-06-2016 05:38 PM

Quote:

Originally Posted by Kzonts (Post 3485854)
I thought anyone with FI has a custom tune and only use a canned tune to drive it to the tuner, or use it as a baseline for the custom tune.

No, the can tine is 80-85% and you can drive on it, very safe.

lj909 06-06-2016 06:23 PM

Quote:

Originally Posted by that_dude (Post 3484597)
ditch uprev and go to ecutek, there are several parameters that are not accessible in uprev that exist in ecutek.

Really consider this. Ecutek=full control. Timing, throttle (real throttle control), you could even have hybrid MAF/MAP tuning.

fillerbunnie 08-06-2016 03:17 AM

Update:

Still F***ed.

I'm certain it's the MAF/MAP sensor...

Sam at GTM was useless, as was Uprev. Basically I'm physically limited by not being able to disable this code.

The original service manual has the P0101 and P010B codes in it, yet Uprev doesn't have them in my rom.

EDIT: after checking out the MAP sensor, it can only read from about -30 to about 1psi. 1psi equates to 5V output (on a 5V input). I'm going to remove the MAP sensor, grab a couple of resistors and feed a constant 3v into the MAP sensor input signal to see if this helps.

The service manual doesn't suggest that P0101 or P010B could even relate to the MAP sensor though, so there is a chance I'm screwed... May be talking to ECUTek soon... Uprev is a joke.

fillerbunnie 08-07-2016 12:55 AM

So, just did the following:
- cleaned TB's
- cleaned MAF's
- reset TBs, ECU and idle air volume

No change, still crippling ECU mode

I then replaced the MAP sensor with a voltage divider putting out 3.2v. this didn't throw a MAP error, but identical symptoms occured (possibly triggered slightly later, I seemed to have a good 5 minutes of driving before the ECU reverted to ****-mode)

Anyone ever tried an ECU swap? I'm tempted to buy an ECU that UpRev supports disabling P0101/B and dropping it in...

TBatt 08-08-2016 09:33 AM

SpecialtyZ sells the MAP sensor from the GTR that is a drop in replacement for the 370Z MAP and it is designed to read boost. That is what I am using with a Ecutek tune from Seb. Contact Seb and see if he can offer you some advice.

EcuTek Tuning - 370Z/G37

kentmo280z 08-11-2016 06:41 PM

Are you still using the Turbosmart BOV? Mine fluttered badly, so I changed to lighter springs AND firmer springs , still fluttered and seamed to blow off early when using a lighter spring. I switched to a Synapse valve, still flutters but seams to work fine, though it performs better ( less flutter) when I keep it lubed.

I also get P101 code a lot when I start up cold, so I bought a cheap laptop and keep it and my uprev cable that I got with my SC kit in the car.
I downloaded my uprev program onto the computer and reset the code when it pops up. Which seems to happen when the car sits for more than a couple days.


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