Weird, sudden AFR issue Proform 750cfm!
Needle and seat on the float may have crap in it. Same with air bleeds. A .031 to .037 is a huge jump and way out of the norm.
Move the IFR to the bottom and readjust the idle circuit. 20 to 50 mph you are mainly on the idle circuit. Moving the IFR to the bottom stabilizes fuel flow in the Idle circuit which is where a street car mainly operates. 4 emulsion holes open, what size are the openings? 2 .026 is all you need. If you have 4 hole blocks run #1 & 3 .026 and block off 2 & 4.
O2 sensors read O2 and can give false readings off what is really happening in a cylinder. As an example, a plug misfire allows more O2 to be seen at the sensor, you think you are lean by the AFR gauge.
I was hoping you might chime in.
Yeah, had to go get some stuff before I could pull it back apart to blow it out.
I figured I must have dislodged something checking restrictor sizes, nothing else makes sense, because it was running good and I was getting closer to my target, up until yesterday.
The emulsion holes are all open and empty as far as I can see, so I guess they are whatever diameter the set screws should be, unless they neck down. Hard to see in a black metering block, and I only have drill bits up to .037 to check with.I will look again after yardwork.
I have been planning to take care of plugging them like you advised last yearI will, as well as moving the IFR to the bottom.
The problem is I have been putting together an order with McMaster for the taps and blanks and pin vise, etc., but I'm not sure specifically what I need. (lengths, thread pitches, etc.) I'd like to make sure I get it all in one order.
I don't have a drill press, so I also need to figure out how to set up to drill them.
Any chance you could help me with a shopping list?
