Engine Sputtering after 351W swap(EFI)

[PKRWUD]

I have to agree with Dark 5.0 on this. I think the main problem is that the injectors are too big. The bigger your injectors are, the lower the pressure needs to be for a near stock application. The lower the pressure, the crappier the spray pattern, and the crappier the spray pattern, the worse it will run. This is why it's important to get the right size injectors.

In any case, with the pressure that he's running, when he goes to WOT, it's going to dump way too much fuel in there, and the result will be black smoke, crappy performance, and eventually fouled plugs. Add to that a .045" plug gap, and you're just asking for problems.

Of course, that's just my opinion.



Take care,
~Chris