#Jeep 4.0 ecu tuning drivers#
#Jeep 4.0 ecu tuning driver#
#Jeep 4.0 ecu tuning code#

(87c257s require a latch board, 27c256 does not (but does require some pcb changes) I might have the wrong pn there on the 2nd). The older non flash ecus have to be modified and a eeprom/flash chip and possibly a latch board depending on which chip is used. Like I said before, once the flash units are taken care of, we will move onto tuning the NA cals since then they will be useable. Really you need to datalog to be able to correct the fuel tables.

So what's your displacement percentage difference? Are the injectors latency close to each other? If they are not, that needs to be adjusted first before trying to do anything else. I can do either of the first two, but getting the flash units programmable is a higher priority for me at this time. Any route is not trivial, simple or straightforward.

#Jeep 4.0 ecu tuning code#

There's 3 ways to accomplish FI in the ecu.Ģ - rescale existing tables for -14 to +14ģ - merge existing fi code with the Jeep codeĮach has its own appeal and troubles. That's the true way to determine how much fuel needs to be adjusted to compensate for the oversize. As far as I know, even modern ecus function in this manner, excepting that they tend to stay closed loop under broader conditions.Īs far as what injectors you have, I would check the flow rate compared to stock injectors. The tables that are programmed are the tables that are used in all calculations, and the learned correction is applied as long as it is within the parameters to permit it to affect fueling. WOT goes open loop, with no feedback or learning of values. It does however learn corrections for idle and part throttle. The ecu does not relearn the fuel tables. so it should be simple for me to reverse engineer this code.

#Jeep 4.0 ecu tuning driver#

I have done linux kernel developed, ethernet driver development, interrupt code in assembly, and so on. Sorry to be blunt - but i think it will save us some time if you know up front exactly what i am clueless at i only had to push a button to flash my work to the board - and i never had any idea what that button did TBH. My embedded work was always done in tandem with an electrical engineer who got everything hooked up to my PC. I think you need to write up an idiot-proof tutorial with a parts list and exact diagrams of what gets wired to what. I can use my sodering iron quite well - it has a temperature control I assume 'powering up' means connecting some of the 60-way pins to something. I don't have a '12V source' - do you mean a bench power supply? - what do i need to buy? i do have a 110V to 12VDC cable from a dead laptop. I don't know what 'protecting the TX line' means - which is the TX line on the 60-way connector? I have never heard these terms before: FTDI, SCI, JTE, SBEC. Note the position and size of the board vs case and the position and thin size of the heat sinks. Here is what the flashable boards look like. Say, how did you find out about us? Was it from the jeepforum post I made? Wondering if my outreach worked The flashable SBEC-II's fit in the same size case but are physically smaller and have thinner heat sinks than the older non flashable ones. I think the pinout between 6 and 8 is a bit different.

We do readily have the capability of dumping out the rom's from these units without unsoldering/touching anything.ĩ3-95 are all interchangeable, provided its the same engine.

#Jeep 4.0 ecu tuning drivers#

Mainly, if the 4.0 ones have extra drivers to drive the extra injectors. The thing we're not sure is the hardware difference between the 4.0 and 5.2 SBEC's. Mind you, Andrew and I are working on 4.0 Cals. I'd be very interested in your high altitude cal and also the mopar performance one. You CAN make the one on the right work, you'd have to take off the potting material, unsolder the eprom, solder in a socket and get a 27SF512 chip and a burner. Basicall you need a mid 94 and up ECU to be flashable. It would need to be socketed to work its the older one.

You might have to taking a bit of the potting off and take a peek. Im not sure if that reman one is flashable. I wonder if truck and car SBEC-II's are are interchangable with the only functional difference being the cal itself? That cant be. It actually looks like a passenger car/turbo mopar SBEC-II. Whoa! that is super interesting, the one on the left looks like no other Jeep SBEC-II ive ever seen.