Would a 47 fuel pressure at idle with vacuum off cause a 41/91 code ? I blocked off the vacuum line and ran a gauge on the rail and she was 47! I dialed it down to 39 then put the vacuum line back on and she fell to 30/31 .
I hate being a first time poster with a tech issue but I’ve totally run out of ideas and need some help.Ive done a ton of reading and mechanical work based off the forums on this site trying to solve my issues .
I own a 1993 lx 5.0 convertible and am having idling issues ( sounds like its camed but isn’t) and predetonation ,and à first this last weekend the power lose in 5th,4th where my car just lost speed when I was floored on the highway and all I can watch was my speedo drop .No backfiring ,stalling just power loss until I got to a certain rpm .