Forced Induction no one to talk to

rhd · 02-25-2013, 07:58 PM

Redline...

lineyho · 03-27-2013, 04:27 PM

I wanted to update this thread because It's irritating when you get a story going and it is nevery finished. Seems to happen a lot on these forums. I finally go my car fixed after weeks of frustration. There were a lot of speculation from members regarding what might be the issue, but no one hit it on the head. Originally I did not have the uprev cable when I bought the car. I took the car to a tuner, (not Uprev) who spent a lot of time scratching his head, but could not get into the tune because they were not uprev certified. There are only 2 such tuners in WA. The local guy fixed a few minor things for me but most of their time was labor chasing things that did not make sense. After replacing an 02 sensor fixing some wires and an oil leak, they said they couldn't do any more for me because they could not get into the tune. So I stopped driving the car in fear of damaging it. I did eventually get the original uprev cable from the original owner and was excited to get the car back down to the shop. Once I did I was told that the cable was not married to the car and that they could still not get into the tune ? Dang ! They said, as far as they could tell, the tune on the ECU was the standard Z tune. So I make an appointment with the last shop that tuned the car in Seattle. The tuner figures out that someone flashed the ECU back to stock, because his tune or any other tune was not there. When I bought the car, the previous owner had taken the car to Nissan for an ABS issue. Nissan must have update the ECU and wiped out the tune. The Tuner is Seattle still had the Previous Tune on his computer, so he reflashed the ECU back to the last Dyno. He gave me the ROM file and sold me another license. I drove away in a half hour and the car runs like a charm !!!! Story ended....... The tuner said that dealers flash ECU's all the time without thinking to tuned cars. I thought how stupid can they be ? Apparently pretty stupid. Anyway, I'm happy now and on my way to the next project. While the car was layed up I install all new stereo equipment. Looking for an oil cooler now. GTM 34 row is pretty expensive. I'll probably do a little research to see if I can find a quallity oil cooler at a lower price. Thanks for all the comments and suggestions.

theDreamer · 03-27-2013, 04:31 PM

On the oil cooler suggestion, you can piece one together if you want also, there are a couple DIY on the forum.
Look at Z1 also, they have a couple, the main issue is going to be mounting location & lines.

elperuano · 03-27-2013, 04:57 PM

Hopefully runnin a boosted car on a stock tune didnt do much damage.
How much boost are u running?
Glad u got the car on the road again!

Chuck33079 · 03-27-2013, 05:21 PM

How did it even run on the stock tune with larger than stock injectors?

lineyho · 03-27-2013, 06:41 PM

So first of all I did not drive the car much while we were trying to figure out what was going on. I didn't want to cause any damage if the intermittent detonation, pinging or what ever you want to call it was real. The pinging would only happen on the freeway after about 15-20 minutes of driving at 2500 rpm. It would not come on any other time. (low constant RPM) The pinging would just all of a sudden start. I quit driving in 6th gear and kept the RPM up to 3000 in 5th where the pinging would never start no matter how long I drove. I also rarely boosted the FI. If pinging started, I would pull over immediately, turn the car off then restart. The pinging would stop and I would continue on. The uprev tuner said that there are other issues that may have sounded like detonation but not "real detonation". So I don't know if damage was done or not. I'm guessing the reflash to stock happened a week before I bought the car. The car was not being driven at the time so, I think the issue started with me. Other than the pinging, the idle was rough and irratic, the throttle was not real smooth. It seemed as though the boost gage sequence was not as smooth. The car did get up and go if you wanted it to.

tower74 · 03-28-2013, 12:35 AM

That makes complete since now. When I was tearing my turbo system out of my old car I had something close to what you just described. The problem was I forgot to change out the injectors and was running a stock tune with 600cc injectors. Car idled fine but at about 3000rpm it would sputter and just bounce the tack. Good to here it was something easy.

03-27-2013, 04:27 PM	#32 (permalink)
lineyho Base Member Join Date: Dec 2012 Location: Bothell, Wa Posts: 38 Drives: 2010 Base, GTM TT Rep Power: 13	Original Thread Update & closing I wanted to update this thread because It's irritating when you get a story going and it is nevery finished. Seems to happen a lot on these forums. I finally go my car fixed after weeks of frustration. There were a lot of speculation from members regarding what might be the issue, but no one hit it on the head. Originally I did not have the uprev cable when I bought the car. I took the car to a tuner, (not Uprev) who spent a lot of time scratching his head, but could not get into the tune because they were not uprev certified. There are only 2 such tuners in WA. The local guy fixed a few minor things for me but most of their time was labor chasing things that did not make sense. After replacing an 02 sensor fixing some wires and an oil leak, they said they couldn't do any more for me because they could not get into the tune. So I stopped driving the car in fear of damaging it. I did eventually get the original uprev cable from the original owner and was excited to get the car back down to the shop. Once I did I was told that the cable was not married to the car and that they could still not get into the tune ? Dang ! They said, as far as they could tell, the tune on the ECU was the standard Z tune. So I make an appointment with the last shop that tuned the car in Seattle. The tuner figures out that someone flashed the ECU back to stock, because his tune or any other tune was not there. When I bought the car, the previous owner had taken the car to Nissan for an ABS issue. Nissan must have update the ECU and wiped out the tune. The Tuner is Seattle still had the Previous Tune on his computer, so he reflashed the ECU back to the last Dyno. He gave me the ROM file and sold me another license. I drove away in a half hour and the car runs like a charm !!!! Story ended....... The tuner said that dealers flash ECU's all the time without thinking to tuned cars. I thought how stupid can they be ? Apparently pretty stupid. Anyway, I'm happy now and on my way to the next project. While the car was layed up I install all new stereo equipment. Looking for an oil cooler now. GTM 34 row is pretty expensive. I'll probably do a little research to see if I can find a quallity oil cooler at a lower price. Thanks for all the comments and suggestions. elperuano, tower74 and DEpointfive0 like this.

03-27-2013, 04:31 PM	#33 (permalink)
theDreamer A True Z Fanatic Join Date: Feb 2009 Location: Texas Posts: 30,879 Drives: 370z Rep Power: 4210	On the oil cooler suggestion, you can piece one together if you want also, there are a couple DIY on the forum. Look at Z1 also, they have a couple, the main issue is going to be mounting location & lines. __________________ theDreamer's Z // Fast Intentions // Uprev // GTM // HKS // TEIN theDreamer's Silvia // URAS // GREDDY Houston Zs // Facebook // Twitter // Instagram

03-27-2013, 05:21 PM	#35 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29539	How did it even run on the stock tune with larger than stock injectors? __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

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03-27-2013, 04:57 PM	#34 (permalink)
elperuano A True Z Fanatic Join Date: Oct 2011 Location: Southwest FL Posts: 1,374 Drives: G37S Rep Power: 29	Hopefully runnin a boosted car on a stock tune didnt do much damage. How much boost are u running? Glad u got the car on the road again!

03-27-2013, 06:41 PM	#36 (permalink)
lineyho Base Member Join Date: Dec 2012 Location: Bothell, Wa Posts: 38 Drives: 2010 Base, GTM TT Rep Power: 13	So first of all I did not drive the car much while we were trying to figure out what was going on. I didn't want to cause any damage if the intermittent detonation, pinging or what ever you want to call it was real. The pinging would only happen on the freeway after about 15-20 minutes of driving at 2500 rpm. It would not come on any other time. (low constant RPM) The pinging would just all of a sudden start. I quit driving in 6th gear and kept the RPM up to 3000 in 5th where the pinging would never start no matter how long I drove. I also rarely boosted the FI. If pinging started, I would pull over immediately, turn the car off then restart. The pinging would stop and I would continue on. The uprev tuner said that there are other issues that may have sounded like detonation but not "real detonation". So I don't know if damage was done or not. I'm guessing the reflash to stock happened a week before I bought the car. The car was not being driven at the time so, I think the issue started with me. Other than the pinging, the idle was rough and irratic, the throttle was not real smooth. It seemed as though the boost gage sequence was not as smooth. The car did get up and go if you wanted it to.

03-28-2013, 12:35 AM	#37 (permalink)
tower74 A True Z Fanatic Join Date: Oct 2011 Location: KCMO Posts: 1,597 Drives: 2017 ZL1 Camaro Rep Power: 370	That makes complete since now. When I was tearing my turbo system out of my old car I had something close to what you just described. The problem was I forgot to change out the injectors and was running a stock tune with 600cc injectors. Car idled fine but at about 3000rpm it would sputter and just bounce the tack. Good to here it was something easy.