Was wondering if anyone would have any ideas on a 94 Chrysler New Yorker, 3.5 V-6. Around the speeds of 35 to 65, when I accelerate it spits and sputters and sometimes backfires a little, sometimes it idles a little rough, but not always, tested the fuel pressure it is 40psi, put in new plugs and wires, replaced the oxygen sensor, checked the codes with the key on key off, am only getting code 55, could someone give me any new ideas ? I am thinking it may be some injectors going bad, or could the throttle sensor cause this ? Thanks in advance. David