About to throw in the towel!
#1
About to throw in the towel!
Well I have had my car tuned a total of 3 times now by "professionals" the most recent one I left with 240whp a terrible stutter at WOT and 3 weeks later a blinking cel but no stutter at WOT it has now moved to the cruising rpms and makes my normal hiway driving a pain. The car drives like crap and and feels no more powerful than when I ran a stage 0 on 5psi. However Im running 12.5 psi.
I really dont know what else to do, I have played with the maps alittle and got the car driving slightly better but still making terrible power and horrible mpg (not my main concern but still...)
Any of you self or pro tuners out there have any tips lend me some advice before I end up ripping all of it out and sell my tC. I will list my setup below and can e-mail a copy of my map or data-log to anyone who would like to take a shot at helping. The blinking CEL worries me a bit.
MHI 20G @ 12.5psi
hks ssqv bov not recirc'd
cheap WG but it holds boost fine, turbo concepts i think is the brand
PWR liquid-to-air intercooler kit
550cc pnp injectors
Emanage ultimate w/ pressure sensor
innovate wideband
2.5 down pipe/s-pipe with QTP cutout on s-pipe
Gizzmo IBC boost controller
1 step colder plugs gapped at 35 (ive tried 2 step colder too and no improvement)
I think that covers it.
I really dont know what else to do, I have played with the maps alittle and got the car driving slightly better but still making terrible power and horrible mpg (not my main concern but still...)
Any of you self or pro tuners out there have any tips lend me some advice before I end up ripping all of it out and sell my tC. I will list my setup below and can e-mail a copy of my map or data-log to anyone who would like to take a shot at helping. The blinking CEL worries me a bit.
MHI 20G @ 12.5psi
hks ssqv bov not recirc'd
cheap WG but it holds boost fine, turbo concepts i think is the brand
PWR liquid-to-air intercooler kit
550cc pnp injectors
Emanage ultimate w/ pressure sensor
innovate wideband
2.5 down pipe/s-pipe with QTP cutout on s-pipe
Gizzmo IBC boost controller
1 step colder plugs gapped at 35 (ive tried 2 step colder too and no improvement)
I think that covers it.
#3
MHI 20G @ 12.5psi
hks ssqv bov not recirc'd
cheap WG but it holds boost fine, turbo concepts i think is the brand
PWR liquid-to-air intercooler kit
550cc pnp injectors
Emanage ultimate w/ pressure sensor
innovate wideband
2.5 down pipe/s-pipe with QTP cutout on s-pipe
Gizzmo IBC boost controller
1 step colder plugs gapped at 35 (ive tried 2 step colder too and no improvement)
I think that covers it.
Umm...that's seems rather scary. 550cc @ 12.5 PSI on a 20G...man what kind of duty cycle is that? I can imagine it's HIGH. The Blinking CEL could mean that you are leaning out.
I would
A) Turn down the boost
or
B) Bump up the injector size.
I have ran as much as 11lbs on a 16G with 550cc's, but when I went to a 20G, I ran 750cc's on 11.5-12lbs. At that much boost on 750cc's I want to say my duty cycle was around 70-80%. You could be running out of fuel. More details on this please.
#6
First I would change your gap on your plugs. .035 seems too big to me and I think most boosted scions are running .030 or smaller. I would try .028 to start out with and go up if the MPG is still low or go down if you are still stuttering. Next I agree with rhythm and that the boost level seems too high for 550cc injectors. I have a tdo6 20g and I run 10.5 psi and the FIC says I have a duty in the 90% range with an 11.5 AFR.
Last edited by OuterHeaven; 03-20-2010 at 07:44 PM.
#7
you guys say 12.5 is to high for 550's yet i know someone local at 16 psi on 550's... hes on the facebook boosted scions club and wrote that and me and mike (elevationtc) were like wtf bro hows that possible lol...
#8
dude hes on stock exhaust and small turbo.. anything is possible..
#9
First off email your map to mike@mtuned.net.. Ill look and see if theres anything funny.
Two. Like someone else said, check the gaps it could be spark blow-out. Blinking CEL is misfires!
Gap plugs to .27 also make sure plugs are not burnt up, take pics of the plugs if you could.
Two. Like someone else said, check the gaps it could be spark blow-out. Blinking CEL is misfires!
Gap plugs to .27 also make sure plugs are not burnt up, take pics of the plugs if you could.
#11
Yup i do a C-test before i tune anyone now. I include it in tuning cost. Both for me and customer good to know!
i say .027 which is a little tight but it deff elimintates blow out!
but like rob said .030 should be fine!
#14
The plugs look pretty good, light grey, no fouling or black suit on any of them, no indication of spark knock either. I agree 85% duty cycle on 10psi is high, that explains my terrible mph, however i dont know why its taking 85% to keep me at good afr's.
#16
First off email your map to mike@mtuned.net.. Ill look and see if theres anything funny.
Two. Like someone else said, check the gaps it could be spark blow-out. Blinking CEL is misfires!
Gap plugs to .27 also make sure plugs are not burnt up, take pics of the plugs if you could.
Two. Like someone else said, check the gaps it could be spark blow-out. Blinking CEL is misfires!
Gap plugs to .27 also make sure plugs are not burnt up, take pics of the plugs if you could.
True that, I forgot about that.
Rozz, what is your A/F at WOT?
#18
Bro, you got to small of injectors. Either change them, lower the boost, or buy a Return Line Setup.
Food for thought, I'll sell you my 750cc injectors for $200 bucks + shipping. They are RC Engineering.
#20
Also how do you calibrate the TPS, i know mine got moved by my last tuner. Dont think it should have been.