Ai 427 intermittent fuel issue

[Orange cv713]

3 hours ago, fjh said:

have you checked the fuel pressure ???

So hear is some more ignorance on my part I haven't found a port to check pressure so do I take the return check valve out and tap in there 

[Joey Mack]

There is a 1/4" pipe plug behind the overboard breather. You can tie in there, if the plug wants to come out, or you can 'T' into line going in to the block below the #4 cylinder... 

[R.E.D]

2 hours ago, Orange cv713 said:

So hear is some more ignorance on my part I haven't found a port to check pressure so do I take the return check valve out and tap in there 

 

[R.E.D]

Test for static pressure and under load. If you get hose long enough,you can zip tie it to the windshield wiper and drive it around the block.Dont remember the most minimum pressure requirements but someone here will chime in.

[Joey Mack]

60-80 PSI. it used to be 100, but that pressure was blowing out the orings. That plug may fight you, but it is directly in to the fuel gallery.

[Orange cv713]

1 hour ago, Joey Mack said:

60-80 PSI. it used to be 100, but that pressure was blowing out the orings. That plug may fight you, but it is directly in to the fuel gallery.

Okay that is awesome thank you and I chased the wires out of the computer for the ambient air temp sensor and it was the ones I suspected that are dead head with a empty plug in the end 

[Joey Mack]

I forgot to add that the fuel pressure regulator is the 45 degree fitting that i said you can 'T' into...  if the fuel pressure is low, towards 60 or less and you are not making oil do to fuel dilution, then you need to replace that regulator...  then go from there with road tests...