Does anyone know anything about flashing the ECM? -
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post #1 of 4 Old 01-12-2005, 10:07 AM Thread Starter
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1992 YJ Wrangler 
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Does anyone know anything about flashing the ECM?

Does anyone know where or if there are programs to flash the ECM with? I'm just wondering what kind of programs they have for Jeeps. My friend has one for his truck, and it improves his gas mileage greatly. He can re-flash it and then the fuel consumption is set up better for racing. I'm just curious if there is one for Jeeps.

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post #2 of 4 Old 01-18-2005, 11:06 PM
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Back when I was trying to decide whether or not to buy a performance PCM, I read an article about flashing the PCM on Jeeps, but I cannot find it now. IIRC it was not something that the average consumer could perform. It required installing a socket on the board, so the chip could be removed, and a socket (with attendant hardware/software to flash the chip. I never did come across anything that would allow modification of the PCM's programming while in use.

Black 1996 5.2L ZJ Limited
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post #3 of 4 Old 01-19-2005, 12:03 AM
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if i were you i would not mess with the diagnostics of such an intricately designed system. The air/fuel curves are set at a certain ratio for a purpose. If you have the V8 the mopar performance PCM is about your only bet. The Jet chips for 4.0 and V8 grands are another option but over time the curve weans itself back to stock setting, dont ask me how but thats what I've heard EVERYONE say that has got a Jet chip.

1998 ZJ - 36's & bent unibody - RIP
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post #4 of 4 Old 01-22-2005, 11:01 AM
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working for a jeep dealer in service, I would say dont do it,
I have asked the techs the same ? and they say yah you can mess with it, but its not worth it, your better off doing engine mod's instead
good luck

Jeep Chrysler Dodge services advisor 9yrs,, OUCH,
95zj, 3"skyjacker, 33"bfg a/t, custom front bar, HELLA 500's
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