haltech cuts out the engine under WOT
#1
Registered User
Thread Starter
Join Date: Jun 2007
Location: south africa
Posts: 103
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://my350z.com/forum/images/icons/icon1.gif)
Hi,
I am currently running a built 3.8 twin turbo. Got the Haltech a while back and have recently started experiencing an issue. When I'm under wide open throttle and start getting into a peak power band my engine cuts out, it goes into an idol kinda mode and am not sure whats happening. I have to switch off the car and wait for about 30 seconds. Turn the car on and then everything is fine again.
If anyone has experienced this kind of issue please assist.
thank you
DDD
I am currently running a built 3.8 twin turbo. Got the Haltech a while back and have recently started experiencing an issue. When I'm under wide open throttle and start getting into a peak power band my engine cuts out, it goes into an idol kinda mode and am not sure whats happening. I have to switch off the car and wait for about 30 seconds. Turn the car on and then everything is fine again.
If anyone has experienced this kind of issue please assist.
thank you
DDD
![dunno](https://my350z.com/forum/images/smilies/dunno.gif)
#6
Registered User
Join Date: Oct 2008
Location: venezuela
Posts: 2
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://my350z.com/forum/images/icons/icon1.gif)
EQUATION
$ (to much money) + to time to try tune the engine = HALTECH
_= (equivalent) to PROBLEMS!! (without technical support)
$ (to much money) + to time to try tune the engine = HALTECH
_= (equivalent) to PROBLEMS!! (without technical support)
Last edited by eperfoemance; 10-25-2008 at 10:36 PM.
Trending Topics
#10
Banned
iTrader: (5)
Join Date: Nov 2005
Location: Austin TX
Posts: 1,095
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://my350z.com/forum/images/icons/icon1.gif)
It's probably cheaper to fly Hal out there to get your tune right and the car running solid than it is to pay for custom tuning again and again till they get it right.
Hal has the knowledge and the software to make things work. I'd atleast consider it.
Hal has the knowledge and the software to make things work. I'd atleast consider it.
#11
New Member
iTrader: (2)
![Default](https://my350z.com/forum/images/icons/icon1.gif)
I'm having the exact same problem, with a totally different setup! I have not been able to find the solution, but I have a suggestion from Technosquare that seems plausible and the symptoms match exactly.
FYI, I'm running the Pro-EFI 48 PIN and Technosquare reflash to raise the rev limit. I have an SGP built longblock and Greddy TT. The problem did not start until I did the reflash, so we keep thinking it is related. I had them redo the reflash and only adjust the rev limit (originally they did other stuff). It is still doing the same thing. I have had Jason from Pro-EFI look at the car, as well as Tony from UMS. Neither of them find anything wrong with my programming on the Pro-EFI. Tadashi at Technosquare says it is a common problem when the MAF gives a voltage reading over 4.75. He said there are a few different devices that will limit/control the voltage reading going from the MAF to the stock ECU. The one he mentioned is the HKS FCD (Fuel Cut Defensor), but I can't find anywhere to get it and UMS couldn't find one to get me either.
Anyone else have any feedback or advise on this? I am dying to get this resolved.
FYI, I'm running the Pro-EFI 48 PIN and Technosquare reflash to raise the rev limit. I have an SGP built longblock and Greddy TT. The problem did not start until I did the reflash, so we keep thinking it is related. I had them redo the reflash and only adjust the rev limit (originally they did other stuff). It is still doing the same thing. I have had Jason from Pro-EFI look at the car, as well as Tony from UMS. Neither of them find anything wrong with my programming on the Pro-EFI. Tadashi at Technosquare says it is a common problem when the MAF gives a voltage reading over 4.75. He said there are a few different devices that will limit/control the voltage reading going from the MAF to the stock ECU. The one he mentioned is the HKS FCD (Fuel Cut Defensor), but I can't find anywhere to get it and UMS couldn't find one to get me either.
Anyone else have any feedback or advise on this? I am dying to get this resolved.
#13
New Member
iTrader: (2)
![Default](https://my350z.com/forum/images/icons/icon1.gif)
The car does not throw any CEL when this happens. This also is perfectly in line with what Tadashi at TechnoSquare told me. He said it is not a matter of going into a fail safe mode, but rather the stock ECU does not have parameters at all under these conditions. The programmers at Nissan failed to create any tables for these higher voltage readings, so the system just doesn't know what to do and shuts off. I can tell it is not cutting fuel, either, since the car smells very rich when it happens. It sounds like the OP is having the exact same issue, so if we figure out the solution, it should work for both of us, even though the systems used are different.
#15
New Member
iTrader: (2)
![Default](https://my350z.com/forum/images/icons/icon1.gif)
I am not sure about the MAF. At one point it was removed, and we were told to put it back on. I'll ask Jason if we can remove it. Thanks for the advice.
BTW, I think your website shows the HKS FCD as something you carry. Do you have these and do you think it would resolve the issue?
#18
New Member
iTrader: (18)
![Default](https://my350z.com/forum/images/icons/icon1.gif)
Be careful w/ removal of the MAF on a 5AT. I've read that the MAF is used to generate "calculated load" and absence of that signal may mess up the % load signal sent from the stock ECU to the TCM. It's one of those 5AT specific quirks that make running without the stock ECU problematic (until someone finally cracks the TCM programming).
I don't know exactly what is going on here, but you could ask the UpRev folks for some help. I've had no trouble with the Haltech on my 2004.5 5at G35 and I've flashed the stock ECU many times (via Osiris).
I don't know exactly what is going on here, but you could ask the UpRev folks for some help. I've had no trouble with the Haltech on my 2004.5 5at G35 and I've flashed the stock ECU many times (via Osiris).