if you used bosch cap, rotor and plugs-not platinum, that should be ok. if you used bosch wires, i've had 4 cars over the years with new bosch wires that had a miss. brand new out of the box, number 4 cyl on 2 cars, i forget 1 car and the coil wire on the 4th. replace the 3 injectors and report back. i alway do 8 because the results are great. i hope you replaced all the seals on the injectors and holders. good luck, chuck.