mrfister11
10+ Year Contributor
- 167
- 1
- Oct 19, 2010
-
clinton,
Missouri
car-95 gst, evo III 16g ported,ported man/o2,big fmic, tial 50mm bov, 90 cams, 950cc, 255, adj fpr, injen intake,
my issue is i picked this ecu with tune from a guy who had it on a 95 gst 5 spd. evo 3 16g 560 inj. almost same setup as me(my 550 are at fic right now). he said tune was very aggressive and needs atleast 93 octane.. i never road in the car but i heard it start.. i put this in my car changed the inj. scaling, and latencies and took it for a spin with my stock smic and bov... ran alright but would cut out bad and would knock like crazy.... so i took out some timing in the whole range because i only had 92 octane and at the time the 450cc.. still would knock like crazy.
swapped my 950cc and changed the scaling and latencies accordingly and started from the other tune again.. still knocking.. cut the timing and it kind of went away
swapped on my fmic with bov(im using a mbc until my stuff gets here for abc) and took for a spin and about 3200 started to spool and when it got close to 3600 3800 pegged my gauge out at almost 30psi almost instantly, also cut out. i turned boost back down to ~13. still cuts out.. cannot get low or mid trims to stay put. idles real good but yesterday i noticed my trims would max out to 12.5 on both and not move no matter what scaling i used. reset ecu trims and started fresh with scaling and latencies again and ran alright w/o knock but not the power i wanted..
anyways long story short, i noticed the maf scalings are way off compared to others i have seen.. in my log it comes up with boost psi at atleast 25-50 all the time. and my rpm will split between actual and about 900 constantly.. ill post up a log..
what would cause the rpm to be so fluctuating and the map to read the much psi. i assumed it was supposed to be vacuum but it goes up with boost. i already ordered stuff for sd but i know everything is good as far as sensors like maf except i changed the cas(mine is behind cam gear) and map sensor because they had got broken while off of car.
also this is one of the only logs i could post because of size.. i have other ones where the graph for rpm is solid from top to bottom..and i have messed with this tune enough that i can get it to drive highway and idle perfect. but i do light pulls and once in a while a hard one til a knock or cutout then i let out.. i have stock exhaust and get the the cat out until next week and my wb is the aem with 5v out so i cant put it up front
hope someone can understand this
my issue is i picked this ecu with tune from a guy who had it on a 95 gst 5 spd. evo 3 16g 560 inj. almost same setup as me(my 550 are at fic right now). he said tune was very aggressive and needs atleast 93 octane.. i never road in the car but i heard it start.. i put this in my car changed the inj. scaling, and latencies and took it for a spin with my stock smic and bov... ran alright but would cut out bad and would knock like crazy.... so i took out some timing in the whole range because i only had 92 octane and at the time the 450cc.. still would knock like crazy.
swapped my 950cc and changed the scaling and latencies accordingly and started from the other tune again.. still knocking.. cut the timing and it kind of went away
swapped on my fmic with bov(im using a mbc until my stuff gets here for abc) and took for a spin and about 3200 started to spool and when it got close to 3600 3800 pegged my gauge out at almost 30psi almost instantly, also cut out. i turned boost back down to ~13. still cuts out.. cannot get low or mid trims to stay put. idles real good but yesterday i noticed my trims would max out to 12.5 on both and not move no matter what scaling i used. reset ecu trims and started fresh with scaling and latencies again and ran alright w/o knock but not the power i wanted..
anyways long story short, i noticed the maf scalings are way off compared to others i have seen.. in my log it comes up with boost psi at atleast 25-50 all the time. and my rpm will split between actual and about 900 constantly.. ill post up a log..
what would cause the rpm to be so fluctuating and the map to read the much psi. i assumed it was supposed to be vacuum but it goes up with boost. i already ordered stuff for sd but i know everything is good as far as sensors like maf except i changed the cas(mine is behind cam gear) and map sensor because they had got broken while off of car.
also this is one of the only logs i could post because of size.. i have other ones where the graph for rpm is solid from top to bottom..and i have messed with this tune enough that i can get it to drive highway and idle perfect. but i do light pulls and once in a while a hard one til a knock or cutout then i let out.. i have stock exhaust and get the the cat out until next week and my wb is the aem with 5v out so i cant put it up front
hope someone can understand this
