Injectors??

[Dsm42oA]

Im getting random misfire codes, and misfires in cylinder 2 and 3. I have new plugs, wires, and coil pack, new fuel filter. Engine starts up fine then back fires when acclerated at idle. When driven anywhere between 1500 rpms and 3000rpms it sputters and back fires. I dont know what else it could be. It cant be my tps and I doubt its my maf. And my pcv valve still rattles,, so its good. Im thinking injectors. What do you guys think?

 

[ram rt]

Since you have steady codes between 2 and 3 you could try swapping the injectors with 1 and 4, but be careful as the seals by now will be pretty dried out if they have never been replaced and you do not want to introduce new vacuum leaks into the system. When you say it starts to cut out at 1500-3000 does it end up getting better up top or is that as far as you can take it?

If that's as far as you can take it what are your plugs gapped at? You may be experience spark blowout. They should be gapped at anywhere between .045-.050 for the 420a.

Matt

 

[Dsm42oA]

I have4 working injectors im going to put in this weekend. But it gets better at 3k and up. I cant gap the plugs because theyre the bosch platinum fusions. With four grounds.