Is tuning Software Required?
Is tuning Software Required? I'm puttin a 98 LS1 into my Jeep Grand Cherokee. I was wondering if tuning software would be required to get it running, or if I could limp it around for a month while I save for the software. Any input would be greatly appreciated.
If you are hooking up all the emissions stuff that people like me delete (rear O2's, EGR, air pump), then it should run fine without tuning. Oh, you'll also need some sort of VATS eliminator box.
Here's what I changed with HPTuners on mine:
EGR Enable Change to Disabled
Shift Light Master Enable Change to Disabled
Tach Output Resolutions - High Change to 3 for 8cyl tach
Tach Output Resolutions - Low Change to 3 for 8cyl tach
C.A.G.S. Disable TPS Change to 0%
VATS Control Change to None
First Stage Fan Turn On Temp Change to 206 °F
First Stage Fan Turn Off Temp Change to 199 °F
Second Stage Fan Turn On Temp Change to 226 °F
Second Stage Fan Turn Off Temp Change to 219 °F
New Tire Size Change as Needed
New Gear Ratio Change as Needed
Disable these DTCS:
P0137, P0138, P0140, P0141, P0157, P0158, P0160, P0161, P0401, P0404, P0405, P0410, P0412, P0418, P0420, P0430, P0440, P0442, P0443, P0446, P0449, P0452, P0453, P0461, P0462, P0463, P0530, P0645, P0803, P1415, P1416, P1441, P1539, P1546, P1626
Here's what I changed with HPTuners on mine:
EGR Enable Change to Disabled
Shift Light Master Enable Change to Disabled
Tach Output Resolutions - High Change to 3 for 8cyl tach
Tach Output Resolutions - Low Change to 3 for 8cyl tach
C.A.G.S. Disable TPS Change to 0%
VATS Control Change to None
First Stage Fan Turn On Temp Change to 206 °F
First Stage Fan Turn Off Temp Change to 199 °F
Second Stage Fan Turn On Temp Change to 226 °F
Second Stage Fan Turn Off Temp Change to 219 °F
New Tire Size Change as Needed
New Gear Ratio Change as Needed
Disable these DTCS:
P0137, P0138, P0140, P0141, P0157, P0158, P0160, P0161, P0401, P0404, P0405, P0410, P0412, P0418, P0420, P0430, P0440, P0442, P0443, P0446, P0449, P0452, P0453, P0461, P0462, P0463, P0530, P0645, P0803, P1415, P1416, P1441, P1539, P1546, P1626
If you don't want to deal with tuning it yourself there are also plenty of companies that'll disable the unneeded stuff for you. I personally bought HPTuners because I like to tinker with stuff, but if cash it tight a mailorder tune might be what you need.
TECH Resident
Joined: Oct 2004
Posts: 800
Likes: 1
From: Simi VAlley,CA
I ran my LS1 conversion for a few months with stock GM programming in the original '98 F-body computer......it didn't shift very well but it ran acceptable and actually was pretty reliable until my son got around to tuning it. Then all was well.
