PDA

View Full Version : VSS Questions/Issues



WT91
05-13-2016, 01:21 AM
So, I've tried searching the forum via google to find an answer to my little problem here. I ordered a JTR 2PRS VSS back in February and apparently they still haven't built them. "Oh we'll ship them out one of these months" was the response I got on the phone. At that point, I requested a refund via paypal. Is there a way to program the 7427 computer to divide the incoming VSS signal? My Grand Wagoneer has an 8k VSS stock, and I thought I had heard/read somewhere that the 7427 could compensate for this.

Same issue, but different solution...

What would I need to alter in the $OE 7.4L 5 speed .bin that I am using in order to completely disable VSS related functions? Is it too embedded into everything to bother? I've only really started playing with the programming a few days ago and the truck isn't yet road worthy to see how the missing VSS will influence it.

dave w
05-13-2016, 02:55 AM
One option to convert the 8k VSS down to 2K would be use the Digital Dakota SGI-5 interface unit: http://www.dakotadigital.com/pdf/sgi-5c.pdf

dave w

WT91
05-13-2016, 07:07 PM
I am about to pull the trigger on the Dakota unit, however I sear I had heard somewhere that the 7427 can be programmed/adjusted for different pulse VSS. Am I wrong or am I just not looking hard enough?

dave w
05-13-2016, 08:18 PM
Maybe the attached screen shots will help?

dave w

1project2many
05-13-2016, 11:49 PM
Big discussion with some attempt at software solution:
http://www.gearhead-efi.com/Fuel-Injection/showthread.php?4227-1992-Jeep-Wrangler-with-350TPI-700R4-VSS-Options

Working hardware solution:
http://www.gearhead-efi.com/Fuel-Injection/showthread.php?4275-VSS-signal-converter