To cut to the chase: I remember reading here once about some dude sending his ECU to a shop in Michigan that was able reflash the firmware to work with a 5-speed instead of an auto. Does anyone know of that shop or the guy who got his OBD2 ZJ to play nice 'without' a tranny?
The long and short of it: Last winter, I yanked out my old worn automatic and swapped in a low mileage AX-15. Since my ZJ is OBD2, I was able to get everything but an ECU. It has been running without a hitch, since.
My only problem is: my Jeep is up for emissions testing this March. The ECU thinks my tranny has taken a long walk off a short pier and is setting off the Check Engine Light. The state funded emissions centers won't even pull the vehicle into the bay if that light stays on once the car is idling.
Any hints, ideas, contact info or encouragement would help a LOT.
I love this thing and now that it's a 5-speed, I can't even see getting rid of it.
I talked with several companies about it. They could alter the performance so that it would work better with the manual, it has different idle and engine braking characteristics, but couldn't do anything about the check engine light. That's hardware and not a program change. Can't get rid of it on the obdii.
'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.
I agree with max, wire the cel to the abs or similar light so it comes on at ignition and then goes off with the rest of them.
1996 ZJ Green Laredo V8, 2.5" OME and Bilsteins, 33's, Holes drilled in the roof.
1998 ZJ Platinum Limited 5.9, Backyard parts fodder
1987 Mercedes 300D Turbo, the diesel daily, 30mpg in style
Originally Posted by Texas ZJ1
I heard someone yell "mall crawler" from the back porch. I'll go see who said that. Be right back.
it's been tried, they don't work with zj's. though the v8 works with dodge ecu's.
i can't tell you why they're so different, only that they are. no one has found a work around to my knowledge.
I think that might be my only 'legal' way out. I can't imagine why they wouldn't work with one another...
Even if I could pull the whole harness off a junked XJ...it's all the same plugs, right?
On the other hand, my cluster is on its way out anyways. My coolant temp is pegged at zero... maybe I should rig it.
Problem is... they still scan the car for stored codes. If they can't flash the bulb on command, I'm SOL.