1995 silverado 5.7L ---- after i resealed the lower intake, truck stumbles, hesitates, burps, barks, and damn near shuts down completely while cold.. starts to run better once warmed up to the point where i can barely feel a slight hesitation intermittantly. Reset and checked timing 4 times since... per the set timing procedure --- currently is set @ 0* --- Gone over and double checked everything concerning the intake R&R. all seems well. wondering if this sounds like ignition module problem?? or if anyone has had to deal with this symptom?? Im thinking i have something going bad, coincedental to the intake job, but could be wrong. any insight would be greatly appreciated. THANKS