Pitch those 4 point plugs, they actually hurt flame propogation.
They are not good plugs.
Standard Autolite pulgs are pretty dang good for the Fox. Yes, I do mean the cheap ones.
If you want to find a better plug than that, look for a finer base point. It seems the smaller the base point, the better the flame propogation.
Always start with fuel pressure at 39psi. Don't change it unless there is a problem that you can't correct for otherwise.
Low or high pressure can cause fuel metering issues at low engine speeds, like idle.
Pull your codes to see if your computer has any complaints. Your fuel economy is way too low.
My 408w hit 17 easily, and that was with 3 bores scored to hell from a HG.
There is something wrong, but you may have to look pretty hard to find it.
On the subject of the C&L...
You need to verify that the calibration is correct.
What computer do you have? A9* ?
What sensor are you using? F1SF ?
What size is the sample tube in the MAF? Don't assume the color code is correct.
You will need to measure the sample tube at both the inlet and the outlet, as some of them taper front to back.
Hopefully the calibration was off, and that was causing the poor economy.
(I have listed most of the common C&L sample tube diameters on my website)
Good Luck,
jason
They are not good plugs.
Standard Autolite pulgs are pretty dang good for the Fox. Yes, I do mean the cheap ones.
If you want to find a better plug than that, look for a finer base point. It seems the smaller the base point, the better the flame propogation.
Always start with fuel pressure at 39psi. Don't change it unless there is a problem that you can't correct for otherwise.
Low or high pressure can cause fuel metering issues at low engine speeds, like idle.
Pull your codes to see if your computer has any complaints. Your fuel economy is way too low.
My 408w hit 17 easily, and that was with 3 bores scored to hell from a HG.
There is something wrong, but you may have to look pretty hard to find it.
On the subject of the C&L...
You need to verify that the calibration is correct.
What computer do you have? A9* ?
What sensor are you using? F1SF ?
What size is the sample tube in the MAF? Don't assume the color code is correct.
You will need to measure the sample tube at both the inlet and the outlet, as some of them taper front to back.
Hopefully the calibration was off, and that was causing the poor economy.
(I have listed most of the common C&L sample tube diameters on my website)
Good Luck,
jason