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jss06c6 · 03-13-2017

Billy,

Trying to recall if you have deleted the secondaries. If not, and you have not tuned your VE tables, your fueling will be "close" but not where it should be. In addition, you can edit the DFCO sequence to allow more fuel during deceleration which may help with your stumble upon acceleration. However, you'll need to get your fueling right with your VE tables first.. I've had to make some pretty good changes to mine after adding headers and high flow exhaust. Once you change spark, you'll need to go back to the VE tables and adjust again. It's an iterative process. Marc will get you close, but each engine and setup is unique enough to require fine tune to get the engine into it's happy zone..

Remember as well, that Marc typically installed a "piggyback" chip which works in concert with your stock PROM. We can get the stock BIN file and burn a new EPROM to replace the Haibeck chip, but I don't believe this will be the issue (certainly can be wrong here).

Steve

Sent from my XT1585 using ZR-1 Net Registry mobile app

03-13-2017	#108
jss06c6 Join Date: Aug 2015 Location: Magnolia, Texas Posts: 884	Re: Rough running (UPDATED) Billy, Trying to recall if you have deleted the secondaries. If not, and you have not tuned your VE tables, your fueling will be "close" but not where it should be. In addition, you can edit the DFCO sequence to allow more fuel during deceleration which may help with your stumble upon acceleration. However, you'll need to get your fueling right with your VE tables first.. I've had to make some pretty good changes to mine after adding headers and high flow exhaust. Once you change spark, you'll need to go back to the VE tables and adjust again. It's an iterative process. Marc will get you close, but each engine and setup is unique enough to require fine tune to get the engine into it's happy zone.. Remember as well, that Marc typically installed a "piggyback" chip which works in concert with your stock PROM. We can get the stock BIN file and burn a new EPROM to replace the Haibeck chip, but I don't believe this will be the issue (certainly can be wrong here). Steve Sent from my XT1585 using ZR-1 Net Registry mobile app