[Juggalo_X]

i got some miss at high rpm like 90mph and above how should i adjust my high rpm timing and a/f?

[Florida Mustang]

See if you are running lean or rich by your o2 sensors, you may need more fuel at 90mph. The intake of air is greater at that speed. I would try that first before I change the timing. In the timing side you may be to advance. Try the fuel first and play with that.

Florida Mustang

[Juggalo_X]

Originally Posted by Florida Mustang See if you are running lean or rich by your o2 sensors, you may need more fuel at 90mph. The intake of air is greater at that speed. I would try that first before I change the timing. In the timing side you may be to advance. Try the fuel first and play with that. Florida Mustang

yah ive richened my high rpm a/f mixture by .01 and see if that helps if the miss is gone or less apparent then i will know for sure.

[tomzac]

What are your wideband readings (A/F ratios)? Are you in open or closed loop? Are you adjusting your STFT (short term fuel trims)?

[ESG-642T]

Originally Posted by tomzac What are your wideband readings (A/F ratios)? Are you in open or closed loop? Are you adjusting your STFT (short term fuel trims)?

Or are you just some guy playing with the tuner ?

[Juggalo_X]

ofcourse I'm some guy playing with a tuner lol and I don't have a wide band o2 yet so the only readings I can get from my laptop are from the factory o2 besides the fact that I don't know what to look for in the readin yet but I got rid of that miss any how I reflashed .... must not have took correctly yhe first time

[tomzac]

Without a wideband you'll have no idea what kind of fuel changes you are actually making while in open loop (WOT). The factory O2 sensors are only used for closed loop operation. You don't want to add fuel in closed loop unless your short term fuel trims are demanding the computer adds fuel. Will this software show you what the command A/F ratio is at WOT (open loop)? I'll have to read your write up, but so far it sounds like hackware.

[ESG-642T]

Originally Posted by Juggalo_X ofcourse I'm some guy playing with a tuner lol and I don't have a wide band o2 yet so the only readings I can get from my laptop are from the factory o2 besides the fact that I don't know what to look for in the readin yet but I got rid of that miss any how I reflashed .... must not have took correctly yhe first time

Oh Jesus.

Kaboom imminent

[Juggalo_X]

Originally Posted by SSStang Originally Posted by Juggalo_X ofcourse I'm some guy playing with a tuner lol and I don't have a wide band o2 yet so the only readings I can get from my laptop are from the factory o2 besides the fact that I don't know what to look for in the readin yet but I got rid of that miss any how I reflashed .... must not have took correctly yhe first time Oh Jesus. Kaboom imminent

lol nah i aint playing with what i dont know thats y im asking and if i cant get an answer then i dont touch it

[Juggalo_X]

after corresponding with sniper and giving them the low down on my car they have advised me to globally advance the timing 2 degrees and 1 degree through all rpm range. and its running smoother quieter and better then ever i love it i cant even feel or hear my car idle any more. Props to Sniper!