LTFT Long Term Fuel Trim -25/-28% w/VEC1 +4 LO +4 HI and NO DTC's = ???

Tom and Vipers

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96 GTS heads, cam, headers, full exhaust.

STFT's jump around -5% both banks (-2 to -9% spikes caught visually)

Had to bump the VEC1 Hi to get good <12:1 A/F and bump the Lo to get rid of idle hang.

I suspect the ECU was not tuned due to these codes.

QUESTION: Anyone see any issues here that need further investigation?
 

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