Before I make a final dig in to the build - I was going over AFR management, ECU mods, FlynRyn stuff etc.
A bit confused, but lets go
Star point:
http://www.jeep4.0performance.4mg.com/electronic.html
3 OEM types of engine management + 3 aftermarket EFI + carbed old units.
RENIX 87-90
SBEC 91-95, (OBD 1)
JTEC (96- end of production)
TurboSQUID - any year
Sniper Jeep EFI
Fitech GoEFI 2bbl
Carb
Question to all in the build and those that did it:
Which fuel delivery did you choose?
Which year?
Final injector size? Injector type?
Did you modfy UCU?
Did you modify sensors? Which, how?
Do yoo feel you reached optimum?
Final power? (Recipie stimate, butt dyno, real dyno)
External wide band AFR? YES/NO? What AFR do you read? Stabile over full range?
I read that OBD Ecu (JTec) is self learning and can not be tuned.
Than I read - get a tuner box and contavt FlynRyan and he will do remote tuning
Many thanks in advance for your comments
Engine management mods (ECU, injectors, sensors)
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Engine management mods (ECU, injectors, sensors)
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Re: Engine management mods (ECU, injectors, sensors)
What is the year and model you are building?
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Re: Engine management mods (ECU, injectors, sensors)
The OP has an '00 TJ so that'll have a programmable JTEC ECU. FlyinRyan and chris@christuned are the go to guys for ECU tuning.
1992 XJ 4.6 I6 - 5MT - Stroker build-up, Stroker "recipes" Sold
1995 Mustang GT - 4AT - Modded Sold
2006 Mustang GT - 5MT - Modded Midlife Crisis Car
1995 Mustang GT - 4AT - Modded Sold
2006 Mustang GT - 5MT - Modded Midlife Crisis Car
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Re: Engine management mods (ECU, injectors, sensors)
The 2000, with dreaded 0331 head --> 7120 swap
TJ, 3 cat version
2 cats and O2 sensor and another O2 & cat
OBD II
But I also run a 1990 XJ with Renix that I would like to get cammed with 7120 head swap
I would likr to understand and share good recipies...
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- Making Progress
- Posts: 86
- Joined: July 29th, 2018, 1:03 pm
- Stroker Displacement: 4.6
- Vehicle Year: 2000
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Re: Engine management mods (ECU, injectors, sensors)
Judgin the interior - it is an OBD II XJ
https://youtu.be/RvYOzvRzCGQ
First look into HP tuners
Obviously they have added support for Jeep 4.0
https://forum.hptuners.com/showthread.p ... 99-Jeep-XJ
Need to do a lot of reading over the holidays
https://youtu.be/RvYOzvRzCGQ
First look into HP tuners
Obviously they have added support for Jeep 4.0
https://forum.hptuners.com/showthread.p ... 99-Jeep-XJ
Need to do a lot of reading over the holidays
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- I made it to triple digits!
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Re: Engine management mods (ECU, injectors, sensors)
Chris does my tuning and I have nothing but good experiences with him.
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Re: Engine management mods (ECU, injectors, sensors)
X2,
Chris is very knowledgeable and a great guy to work with.
We jumped on a commercial flight together a while back to help tune one of my customers Stroker build. Big improvement.
He can get busy so patience is sometimes required.
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