My friend just brought over three gauges for my Subaru WRX from the states: Boost, EGT, and A/F.
For the A/F, I only bought the gauge because I only want to do some monitoring. I took them to my friend's shop cuz he is installing them all for free and he says he cant install the A/F gauge without a wideband. I could be stupid cuz I thought you only needed a wideband to tune the A/F.
He pulled out a wideband at his shop and it was a long black rectangular box and said without this box the gauge wouldnt read.
I always thought all you needed to read A/F was the gauge and welding a bung in your exhaust before the cats to feed the A/F sensor. Am I wrong? Do I also need to drop for a wideband to even read my A/F?
Plz hurry with your inputs because, if I do indeed need to drop on a wideband, I need to do it SOON because my other friend is coming from the states to China and he needs to bring it over for me.