View Full Version : FC with lexus AFM

November 3rd, 2005, 03:27 AM
With Lexus 400 AFM (black box and metal cast) How many PSI will I be able to run before FC?

boost fiend
November 3rd, 2005, 10:27 AM
stock fuel cut is around 14 psi.(if memory serves me right). drilling out the stock afm pushes f/c to about 16(i think). as far as the lexus afm, im really not too sure. might be diffrent between on mkIII versus another one. i wouldnt try to totaly get rid of the f/c though, it can help keep your engine in one piece(just the way i like them too be!!!). ya might just wanna do some searching here or elseware online.

November 3rd, 2005, 10:37 AM
for some reason in my car im gettin fule cut at about 9.5 - 10 PSI even after I did the mod maybe my A/F meter box is bad...

November 3rd, 2005, 11:34 AM
The Lexus shouldn't hit FC until far past that. I'd suggest pressure testing your intake / IC to find a leak...

November 3rd, 2005, 11:42 AM
I hit fuel cut at about 14-15 psi....and I have yet to find my boost leak..also on the lex afm with screw backed all the way out

November 3rd, 2005, 12:45 PM
With Lexus 400 AFM (black box and metal cast) How many PSI will I be able to run before FC?

Just out of curiousity... do you have any supporting fuel mods?

November 4th, 2005, 10:17 PM
Lexus AFM, 550's, walbro, and SP61GT @ 14PSI. I hit fuel cut all the time.

November 9th, 2005, 11:08 AM
do you have any piggy back fuel computer? this usually happens if it is set too rich..

November 9th, 2005, 12:28 PM
sp61gt 550s and just started hitting fc at around 22psi depending on temp. recently at 45 degrees it was all the way down to 20psi.

November 9th, 2005, 09:30 PM
Dang, somethings up. I really dont think i have an IC/Vacume leak either.