Fuel Injector Replacement

[Hadlebfc]

I have pulled both the HP and LP injectors in my garage and it didn't require a head gasket. Sounds fishy to me.
And that sounds more like a plug issue. When was the last time you changed those?

Any video available for replacing the HP injectors? I’ve found one for the LP but don’t see any at all for HP. Are they under the valve covers?

 

[FordTechOne]

Any video available for replacing the HP injectors? I’ve found one for the LP but don’t see any at all for HP. Are they under the valve covers?

They’re under the intake manifold. #4 is a the DI rail.

 

[Hadlebfc]

Injectors did not fix the misfire either! Anything else you guys recommend looking at? Plugs, coils, injectors, good compression, nothing obvious from leak down ..

 

[Badgertits]

Injectors did not fix the misfire either! Anything else you guys recommend looking at? Plugs, coils, injectors, good compression, nothing obvious from leak down ..

Yeah 100% replace the plugs, how many miles? You tuned or stock? What type of fuel do you typically run? I think it’s a good idea to replace plugs on these EB engine every 40-50k miles, depending on mileage may also make sense to swap plug wires or even ignition coils (less likely those would need replacing tho) I had a cracked plug in my Z06 vette that’s modified & they were fairly fresh only like 10k miles so you never know….

 

[Hadlebfc]

Yeah 100% replace the plugs, how many miles? You tuned or stock? What type of fuel do you typically run? I think it’s a good idea to replace plugs on these EB engine every 40-50k miles, depending on mileage may also make sense to swap plug wires or even ignition coils (less likely those would need replacing tho) I had a cracked plug in my Z06 vette that’s modified & they were fairly fresh only like 10k miles so you never know

Stage 1 Tuned with 40k miles which were all Highway miles - I replaced all plugs and made sure gap is 0.028, replaced the coil on the misfiring cylinder, cleaned both it’s injectors and still misfiring. Then had a compression test with good compression and a leak down test not showing anything indicative. So wondering what to do next.