Got it running -- hesitates when cold - ZR-1 Net Registry Forums

VetteMed · 07-01-2009

Another bit of info -- today during my running-hot adventure, the hesitation/stumble did NOT go away after warmup. It remained consistently rough at low rpm (smoothed out at around 4K or so). I installed all new injectors from FIC when I pulled the plenum. The car had new fuel pumps installed a couple of years ago by the PO. New GM coils, wires, and plugs.

07-01-2009	#10
VetteMed Join Date: Mar 2009 Location: Orlando, FL Posts: 1,816	Re: Got it running -- hesitates when cold Another bit of info -- today during my running-hot adventure, the hesitation/stumble did NOT go away after warmup. It remained consistently rough at low rpm (smoothed out at around 4K or so). I installed all new injectors from FIC when I pulled the plenum. The car had new fuel pumps installed a couple of years ago by the PO. New GM coils, wires, and plugs.