Jeep tuning master thread

[Gordon-0]

You could also zero out the entirety of power enrichment and be more focused on the base fuel map.

I was actually really wondering about this. The "PE" map doesn't make any sense to me, why not just add those values to the base map? I was thinking about zeroing it out and adding to the base map instead.

Regarding the trims, I don't have a wideband yet so my normal method is to reset the ECU trims then drive around for 30-40 min and go off the LTFTs. Won't disabling closed loop eliminate this as a tuning option?

EDIT:

I guess it makes sense in the context of emissions compliance. There's a PE and PT enrichment delay, so if you were to simply add the fuel in the base table you would get better drivability and more power but you'd have worse emissions. Still, I'm half inclined to zero out the PE and PT enrichment tables and add that fuel to the base table. Then you could more easily predict what will happen and smooth out the graph in a way that makes sense.

IDK, that just seems easier to me and would allow more consistency.

[hyperbolecubed]

Disabling closed loop would enable open loop causing the ECU to use the base fuel map (O2 sensors will essentially be disabled and your scanner will say 0 in every cell when you data log). Whether there's still input from compensation tables I'm unsure. I zeroed out a few tables so I'll see what my wide band says.

When running closed loop, the ECU will use the O2 sensors to keep itself at stoich 14.7 to 1. Closed loop I'm sure is where the compensation tables shine as these adders richen the ratio based on rpm.

Thats what Im playing with is becoming dependent on the base fuel map for open loop.

[hyperbolecubed]

When zeroing the compensation tables/adders be prepared for your initial readings (if you have a wideband) to run a little leaner. Otherwise everything seems to be fine so far. Will be working on timing advance next

[Ruan]

I have a Magnum supercharger on a 2005 4.0L TJ Wrangler Manual. bigger injectors, 2 bar map sensor, altitude is 4400ft. The tuning detail supplied is very vague and I need assistance. the vehicle cranks and doesn't start. When it eventually does, it doesn't idle too bad but isnt happy either. I need help setting everything up to a point where the vehicle can be driven for log files to do some fine adjustments.

Attached in excel format is the file info that I transferred so HP tuners (tj stock file - Copy (1st tune).hpt
no Barometer or MAP info was supplied for the 2 bar map sensor that was supplied.

Please can someone assist me on this

Thank you

tj stock file - Copy.hpt
tj stock file - Copy (1st tune).hpt
650cc(6298)48mmev14_032420228645.xlsx