Jess_sr
11-13-2009, 07:16 PM
When replacing the prom with the GL4 upgrade does the timming have to be reset on a 95 S engine?
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Jake 11-13-2009, 08:01 PM No, your timing should be fine. No adjustments are necessary. Enjoy the new PROM. Jake Green Machine 11-13-2009, 08:24 PM Timing set to OEM spec will work just fine. Its just that -1.94 TDCO is recommended for more power output. Jess_sr 11-13-2009, 09:22 PM Thanks for the reply guys. My son will enjoy it. I don't have a prom for fuel management.:thumb: ak diesel drive 11-13-2009, 09:38 PM Thanks for the reply guys. My son will enjoy it. I don't have a prom for fuel management.:thumb: Isn't the gl4 prom basically a fuel management prom? bk95td 11-14-2009, 01:17 AM Only repeating what i've read. The GM service manual says that any time the ecm or prom is replaced that a tdco learn should be done.The chip has something to do with timeing so I would say that it should have the tdco done. | ||