Mines tapped from the FP reg if you're still looking for examples. Works fine for me. Just make sure the line does not have a check valve between where you plan on tapping and the throttle body. One line I wouldn't recommend is the PCV line, too large and not a good reference of boost or...
It may make it worse IMO. Any chance you have an FP gauge in the car or are logging FP? Maybe you could see it spike or something. A log would probably be the only way we will know for sure.
Edit: Worse in response to "Do you think giving it like 45 psi-48psi as accufab suggests for the # my...
How is the doublepumper wired? Hobbs switch to kick on the 2nd pump? If so at how many psi does it kick in? Maybe it's kicking in at 5psi and that's why you're getting the stutter? Maybe the FP reg is slow to let that extra fuel bypass. If monitor/log O2's (WB is possible) do you see it...
Im with Dave, a wideband isn't as useful to anyone unless it's logged right next to other data, like RPM. In which case the gauge might be cool but not necessary. Go with a cheap PLX SM-AFR or Innovate LC-1 and a powerlogger. Just my .02.
D1 is your ground and A6 is your key-on +12. The colors should be as I stated above. Each connector is a letter, find the connector with that letter and then find the wire coming out of that number pin. Connector A skips pin 3, so don't let that throw you off. The numbers and letters should...
That's a different pink/black wire... This one will be taped right by the ecm plugs. If those wires have been hacked up then you NEED the wiring diagram for the pinout. If you have the diagram, post it here and I'll point out the wires. I can't find my copy right now.
You would still want to connect it at the ECM. You need a wiring diagram for the ecm harness and you will find the + and - and tap each one without cutting them. I don't recall the pin numbers of each wire, but you may find them on here by searching or even on fullthrottletech.com. The - is a...
If you're going to connect it to the FAST in your sig then IMO you want the power to be taken at the ECM. This way there is no variance in voltage or ground resistance between the ECM and the WB. This will help with accuracy.
Do you know the input voltage and output voltage range? This may work if the output voltage scales from 0 to 5. This is how the autometer transducer (for the elec fuel pressure gauge) works and I've been logging that for a while now. You would also want to be sure this one could handle fuel...
If 2nd acts like neutral then this is what happened to my stock trans after too many 30psi passes... :) I think my issue was the band got toasted, but I'm no expert. Dumped it for an extreme automatics trans.