yellowbird

guys, got my cam, headers, and exhaust put on last week +had it mustang dynoed, put on about 75 miles on the car since the mods where done and today while I was coming home sitting at the light, the s.e.s light was flashing ,but as soon as I took off it went away. didnt seem to run any different. any suggestions.

EVIL

missfires detection. even if p300 is off, if it detects too many misfires, the ses light will flash, just not throw a code.

yellowbird

whats causing that to happen.?

EVIL

lots of things.

broken spark plug, bad wire, bad coilpack, bad connestion on the coil pack.

get someone with atap or efi live and find out wich cyl is missfireing.

samz28

you need to desensitize the misfire system. esp if this is at low load/idle. The tuner disabled p0300 so it wont store the code.

if you wanna really trip out watch cyl 1-8 current misfire counts in efilive

yellowbird

can they still tell even if the ses light is not flashing.?

EVIL

the engine will constantly missfire, thats how the pcm makes a ls1 run so smooth in stock form.

Chris@AP-Engineering

iTrader: (-2)

Yellowbird, did you get your idle fixed? If not the offer still stands if you want to bring it by my shop. I would also be happy to look at this problem for you. Just give us a call and we can get you in.

Thanks

BBADWS6

iTrader: (8)

Last time my SES light was flashing i had a crushed valve spring, but that one was obviously solved!