anaconda installed
- Thread starter Trevinator
- Start date
Trevinator
New member
anyone think maybe the stock BPV is leaking boost? I've watched the boost go up to 19-20 psi and then fall back to 9-10 psi while still at full throttle, approaching 4500-5000 rpms. i cant figure out what is causing it.
it looks like the absolute throttle (ultragauge) stays at 83.5% when im at full throttle, and i have never seen it at 100%, so i figure that's normal. but if it were closing the throttle on me, wouldn't the absolute throttle position would also drop?
it looks like the absolute throttle (ultragauge) stays at 83.5% when im at full throttle, and i have never seen it at 100%, so i figure that's normal. but if it were closing the throttle on me, wouldn't the absolute throttle position would also drop?
Sneakerfix
New member
Did you get your datalog back
Trevinator
New member
i haven't had the chance to make one yet. steven from WOT-tuning sent me an updated tune to try based on my comments of it losing boost though. it does feel better, but still the boost falls to 9-10 psi.
i think im going to go any try getting a datalog right now!
i think im going to go any try getting a datalog right now!
Trevinator
New member
just went out and i definitely got a datalog capturing the issue im having. while data logging, i was doing a 4th gear pull and it felt like it was making good power, then it fell on its face.
one thing i notice, is that when its making good boost, the ultragauge reads 100% engine load. but sometimes the engine load will vary between 75-89%, coming from 100% while still at full throttle! this is the only variable other than timing advance that i can see change when the boost falls.
hopefully WOT-tuning can see what is going on.
one thing i notice, is that when its making good boost, the ultragauge reads 100% engine load. but sometimes the engine load will vary between 75-89%, coming from 100% while still at full throttle! this is the only variable other than timing advance that i can see change when the boost falls.
hopefully WOT-tuning can see what is going on.
Sneakerfix
New member
What plugs and gap?
Log knock retard. Sounds like you are experiencing some knock, and the car is closing the throttle to prevent boom boom.
Send me your log file. sales@mpfab.com
Send me your log file. sales@mpfab.com
Trevinator
New member
they're the stock plugs set to the correct gap.
is there anyway for me to see the data myself from the datalog that I recorded? I see timing advance on the ultragauge, but I don't see anyway to look at knock retard.
I just sent you the datalog that I recorded earlier today Walker.
I only run 91-93 in my car, whatever the top grade fuel is, but unfortunately, there is no place to get ethanol free fuel close to me.
is there anyway for me to see the data myself from the datalog that I recorded? I see timing advance on the ultragauge, but I don't see anyway to look at knock retard.
I just sent you the datalog that I recorded earlier today Walker.
I only run 91-93 in my car, whatever the top grade fuel is, but unfortunately, there is no place to get ethanol free fuel close to me.
Stew
Sedans Rule!
What kind of timing are you seeing when boost drops off? And at what RPM? I don't know for sure what Trifecta does with timing for their tunes but the OEM tune only has one cell with 2 deg advance, the rest are at least 3 for high RPM/high boost so if you're seeing less than that, or for sure if your seeing negative numbers it's pulling timing.
As I understand it, when the engine is trying to protect itself it can do any or all of the following: pull timing, close the throttle, lower boost.
Sneakerfix
New member
Stock plugs suck tuned. Should be using coppers gapped to .25
Trevinator
New member
when the boost fell of, it was around 14-15* timing, when on boost, it was around 5* timing, according to my ultra gauge. I figure that the timing is so it runs right on less boost, but maybe its pulling boost that way. I don't have an exact rpm that it drops off, it just doesn't want to pull 21 psi sometimes, and sometimes it just falls off, doesn't do it at any certain spot.
Trevinator
New member
anytime you can get around to it is fine, I just think its cool that you'll look at it for me! I cant think of many places that have the awesome customer service that you do!
Trevinator
New member
what plugs do you recommend I use? whats in there now is stock iridium plugs right?
Trevinator
New member
is there any software that I can download that will allow me to look at the datalogs that I record? I would love to be able to see them myself so I can see how my car is running.
Blue Moon Sonic
New member
I was going to say if it was a KR issue it could be a fuel injection issue.... what do your LTFT's look like on the ultra gauge. I think I might have an answer for you on this one. It does not sound like a turbo issue at all since it's spooling to 17psi. I'd actually suggest going to a .028 gap on the plugs and see where that takes you as well.
Trevinator
New member
I did a datalog from the time I left work to the time I got home tonight, so that should be plenty big enough. I cant use the ultragauge at the same time as im data logging, so I'll take a ride after dinner and post back what my LTFT looks like.
Trevinator
New member
ok, got some numbers. at full throttle, when the coolant is at 200*, its showing 14.06 fuel trim at full throttle. when I completely let off the throttle, it goes down to roughly 7. at partial throttle it varies from 16.9 to the highest of 20.9. this is all the LTFT btw.
those sound pretty high from what I have been reading about on STFT and LTFT, but I don't know what the tune does to those figures.
those sound pretty high from what I have been reading about on STFT and LTFT, but I don't know what the tune does to those figures.
Blue Moon Sonic
New member
When you spool and let off quickly let off the gas does it ever dip into the negative and if you let the car idle does it sit at negative or positive and by how much? I also want to ask what your trims look like at cruising at a steady speed. preferably at 45mph and 60mph. I can tell you are running lean right now. Those numbers are pretty jumbled up. The odd thing is that at partial throttle you are at +16.9 and +20.9, then at WOT you are only at 14.06. I feel like there is either a leak somewhere or your MAF is over reporting how much air is actually going in. Did you ever port your intake manifold and are you running ECP enabled with the tune?