383 starts and dies
02-22-2013, 07:56 PM
#73
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i have 58psi when the engine shuts down. as far as the map yes the correct map is hooked up. i could be loosing spark and ill look into it. my buddy has a snap on scanner with freeze frame data. im going to try and get that tonight and see what happens when it shuts off.
what should the tps sensor be at for proper idle? i wonder if i dont have the throttle body adjusted right.
what should the tps sensor be at for proper idle? i wonder if i dont have the throttle body adjusted right.
02-23-2013, 02:07 PM
#74
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ok i got the freeze frame data. the engine was sitting around 3000 rpm
tp 20%
spark adv. 28deg
engine load 58
fuel system bnk1 open
fuel system bnk2 open
LTFT bank 1 0%
LTFT bank 2 0%
map 30.12 inhg
maf 10.35
O2 1/1 .12
O2 1/2 .06
O2 2/1 .14
O2 2/2 .02
STFT bank1 sensor 1 0.0%
STFT bank1 sensor 2 99.2%
STFT bank2 sensor 1 0.0%
STFT bank1 sensor 2 99.2%
short term FT bank 1 0.0%
short term FT bank 2 0.0%
tp 20%
spark adv. 28deg
engine load 58
fuel system bnk1 open
fuel system bnk2 open
LTFT bank 1 0%
LTFT bank 2 0%
map 30.12 inhg
maf 10.35
O2 1/1 .12
O2 1/2 .06
O2 2/1 .14
O2 2/2 .02
STFT bank1 sensor 1 0.0%
STFT bank1 sensor 2 99.2%
STFT bank2 sensor 1 0.0%
STFT bank1 sensor 2 99.2%
short term FT bank 1 0.0%
short term FT bank 2 0.0%
02-23-2013, 06:06 PM
#76
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my sisters 2010 jeep wrangler has the 3.8L v6 in it and i put the computer on that when the engine was cold and the STFT numbers show -10.8%. thats a huge difference.
02-23-2013, 06:11 PM
#77
ok so i towed the truck to the tuner. he tried to adjust wheatleys safe tune. it was close but to far out for idle. we ended up discovering i had the ls3 map on the truck and its not compatible with my pcm so i had to change it. now sitting on the trailer she will start and idle just fine for about 10 seconds i can rev it if i want but then she cuts out. every time no matter what the run time is the same. it idles ok then drops to about 500 rpm and struggles to stay running and shuts off as if i turned the key off.
If you don't have a scantool like HP tuners or EFI live you're basically pissing in the wind. That data from the handheld unit is basically useless. From you're description it sounds like the tune is way off, although I suppose there's a remote possibility there's a mechanical issue.
02-23-2013, 06:25 PM
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Synergy performance. its a dyno tuner. he was trying to adjust wheatleys safe tune because it was way off when he noticed i had installed the wrong map. i had to tow it back home about 80 miles to change the MAP and he told me it should start now but it is refusing to idle and right about when the STFT numbers hit 99% it gives me dead peddle and dies.