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Old 07-05-2009, 07:00 PM   #1
krahs912
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Default lean running supra??

I Have 95 supra that runs lean and pings bad. have a Apex i AFC Neo Fuel Management on full rich made it better but still pings, just less.(93 octane) Idle is up and down. cant find any leaks in ic piping or any vacuum lines off. i think it suckin in unmertered air but cant find where. i did all these mods last year and car ran great till a month ago. car is adult drivin and only has 40k. any ideas???


Mods
Apex i AFC Neo Fuel Management
greddy fmic
hks exhaust
Greddy Profec B Spec II Boost Controller
boost tuned down to 10psi (was runnin 16-17)
hks ssqv
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Old 07-06-2009, 03:49 PM   #2
pwpanas
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Quote:
Originally Posted by krahs912 View Post
I Have 95 supra that runs lean and pings bad. have a Apex i AFC Neo Fuel Management on full rich made it better but still pings, just less.(93 octane) Idle is up and down. cant find any leaks in ic piping or any vacuum lines off. i think it suckin in unmertered air but cant find where. i did all these mods last year and car ran great till a month ago. car is adult drivin and only has 40k. any ideas???


Mods
Apex i AFC Neo Fuel Management
greddy fmic
hks exhaust
Greddy Profec B Spec II Boost Controller
boost tuned down to 10psi (was runnin 16-17)
hks ssqv
Imho, step 1 is to bypass the AFC and see if it still has the problem. Also check the vacuum line going from the plenum to the oem FPR (fuel pressure regulator). Lastly, if those suggestions don't help, you'll need to do a boost leak check by pressurizing your charge-air system.
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Phil '94 Supra Turbo, 6spd, 'APU'+
Displacement is no replacement for boost.
Life begins at 30psi.


NB: Please consider posting any help requests in a new thread instead of asking me for help privately. About 99.9+% of the time, private help requests end up covering great information that could be very valuable to other forum members. If you have a good reason for needing the help request to be private, I'll consider it. If not, then why not give everyone else the opportunity to pitch in too, and/or learn from the information? Remember, there's no such thing as a dumb question. We're all here to help within this family of Supra owners.
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