Outer Limits 4x4 Board

do you need the vehicle speed sensor connected to run the gen 3 in a patrol because thats another $400 needed unless some one has any ideas to get around it

auto or manual??? i'll assume manual, if so than it's not necsassary, it will provide a bit better fuel economy, but thats about it. Just when you are getting the security disabled in the ECU, get them to disable the speed sensor so it doesn't always bring on the engine check light.

manual is correct. Its the ecu of the same motor do you still need work done to the ecu?

yes you will need to have the security disabled in the ECU, which is not a hard thing to get done, unless you are using the commodore body module and key.

It is possible to run without the vss but there are some issues, VATS is easy to remove but is unrelated to the vss. If you run without the vss you have to get the idle speed motor settings just right or there will be a tendency to either hang up at revs or for the rpm to drop out and then recover or stall alltogether. The vss is a good thing as the ecu takes over idle control when the vss gets down to about 5 kph. The car needs to be connecter to a real time scanner such as EFi Live and the idle motor step count set up such that the there are no issues.


Joel

PGS 4WD wrote:It is possible to run without the vss but there are some issues, VATS is easy to remove but is unrelated to the vss. If you run without the vss you have to get the idle speed motor settings just right or there will be a tendency to either hang up at revs or for the rpm to drop out and then recover or stall alltogether. The vss is a good thing as the ecu takes over idle control when the vss gets down to about 5 kph. The car needs to be connecter to a real time scanner such as EFi Live and the idle motor step count set up such that the there are no issues.


Joel

Joel that is also helpful in my case where I have a efi 5L conversion - it seems to get confused when stopping at lights etc and will drop right down and stall or pick up and recover.

As a fair few guys are now converting gen3's into older commordores and 4x4's (it appears!!) I would suspect most tuners would be getting proficient in tuning out these niggly problems.

ok if i need a vss where do you get them from and how much?

Vman wrote:

PGS 4WD wrote:It is possible to run without the vss but there are some issues, VATS is easy to remove but is unrelated to the vss. If you run without the vss you have to get the idle speed motor settings just right or there will be a tendency to either hang up at revs or for the rpm to drop out and then recover or stall alltogether. The vss is a good thing as the ecu takes over idle control when the vss gets down to about 5 kph. The car needs to be connecter to a real time scanner such as EFi Live and the idle motor step count set up such that the there are no issues.


Joel

Joel that is also helpful in my case where I have a efi 5L conversion - it seems to get confused when stopping at lights etc and will drop right down and stall or pick up and recover.

As a fair few guys are now converting gen3's into older commordores and 4x4's (it appears!!) I would suspect most tuners would be getting proficient in tuning out these niggly problems.

Yes the VN-VT 5.0L suffers the same fate, I normally turn the speed sensor fault off (in software) and set the IAC steps to match the software and the base idle at the lowest you'd want the engine to run. Careful use of timing in the tune helps also.

Joel

could these problems be sorted with using say a motec or wolf system or are theyre benefits in using the standard loom and ecu?

The main benefit is about a $2k saving not to mention the availability of repair parts. A Haltech E6GMH will plug into the genuine Vn-VS manual loom but they are $1600 or so I think.
Nothing aftermarket has the computing power of the LS1 ECU
Joel