94 Knocking after injector rebuild

[Fernando Uribe]

So I had made a post about putting 5.0 injectors in a 94 explorer. That was no go and I decided to keep the stock ones.

While taking apart the fuel rail, I noticed one of the injectors had a grey top and was coded F47E-A2E. The rest were all red tops. So I swapped the grey top with a red top and now that I fired it up, I have a knocking sound.

Was there a stepped I missed? They're all rebuilt with new microfilters and O-rings too.

 

[974X4BLACKSPORT]

I would switch back to the other injector and see if it still makes the noise.

 

[Fernando Uribe]

I would switch back to the other injector and see if it still makes the noise.

I'm planning to do that tomorrow at first light. With some research, the grey injector is a 14lb while the red top is 19lb. Could it have caused a timing problem?