help!!!Car runs super rich @>=30000 RPM maybe intake mani

[shadowdrag]

My car seems to not want to function correctly at 3k and above. When I am driving on the high way below 65 MHP, it drives fine and logger indicate .45-.6V at O2. Other than that, 65 MPH and above it goes to very rich, some times I see 1.0V @ O2 and my car just stumble does not want to go past 3k or >=65. This happens on low and high throttle.

Is it normal to hear the intake manifold breathe very low?
My mani is starting to sound like those honda civic loud breathing intake. My car still makes it normal boost 18psi, no creeps, no spikes.

thanks, anyone

 

[oldman]

So Oldman, how do I stop the hiss from both oil cap and dip stick? Is this a severe problem? I am not sure how the test works but when I am doing the leak test do I close the breather hose from valve cover?

Let me try and explain it again. Oil cap, dipstick, breather hose are all part of the crankcase (crankcase = area under the valve cover, oil passages and your oil pan area). The hissing you hear is air leaking from the intake tract into the crankcase through either turbo seal, pcv valve, valve seals/guides or piston rings. Since you're testing from the TB elbow with the pcv unplugged, you have eliminated both turbo and pcv, the only possibilities left are valve seals/guides or rings if in fact you still hear hissing from under the valve cover testing from the TB elbow. Also make sure to perform both dry and wet compression since piston rings are the suspects and the whole purpose of the compression test. I hope I made it clear this time.

 

[BGGSTin]

Still have a stuttering problem in higher RPM's?

If so just reply and I'll try to tell you my fuel settings. I had a very simiilar problem til' mine was tuned. I have and EVO 3 but I have a 255 and 550's as well.
How much fuel are you pulling out?

 

[shadowdrag]

Still have a stuttering problem in higher RPM's?

If so just reply and I'll try to tell you my fuel settings. I had a very simiilar problem til' mine was tuned. I have and EVO 3 but I have a 255 and 550's as well.
How much fuel are you pulling out?

I am still running on stock setting, 43psi of fuel.

Oldman thanks for all the help, I wish you live closer to me so that I can just pay you to fix my problems.

 

[oldman]

You're welcome, post back your leak test results.

 

[ddavisaf]

With an air tank, not a bike pump.

 

[BGGSTin]

I am still running on stock setting, 43psi of fuel.

Oldman thanks for all the help, I wish you live closer to me so that I can just pay you to fix my problems.

If I run stock fuel settings with my 255 and 550's my car does the exact same thing. I'm puling out:
Global: -45%
1k: 0%
1.5k: -5%
2k: -5%
2.5k: -5%
3k: -7%
3.5k: -7%
4k: -10%
4.5k: -12%
5k: -15%
5.5k: -15%
6k: -15%
6.5k: -15%
7k: -15%

I thought I was leaking, and tried everything because I didn't think I needed to be pulling that much fuel, If you can change you fuel settings.
You're running a T3/T4 so just richen mine up abit or just play with the global and leave the rpm based alone. Hope it helps somewhat, let me know if you need any more info

 

[shadowdrag]

If I run stock fuel settings with my 255 and 550's my car does the exact same thing. I'm puling out:


BGSTin are those your high settings?

I've got my high SAFC2 settings to like:
.8k= -5
1.2k=-9
2.0k= -13....stoich
2.4k=-16.....stoich....0.54
3.0k=-20.....stoich.....0.48
3.4k=-23......runs super rich starting here.
4.2k=-24
..
..
..
..
..

I've just replace thePCV and did another boost leak, now only a little leak coming out from breather at 15psi, usually the dipstick just pops out at 7psi and air comes rushing out like bov. Everthing seems to be seal tight, but car still bogs at idle. I checked the gap from my 3month old ngk 7es and its right between 0.028-.03. Plugs wires are new too.

Car runs great now but stills runs super rich when boost kicks in. WTF Also note, runs super lean in-between gears too, chokes then goes.

I am about finish with this battle, when my Refund check comes next quarter, I am taking it to the shop.

Oldman, I swear I need to pay you to fix my car.

 

[BGGSTin]

Yeah, that's Exactly what mine was doing. When it got any boost it ran super rich, which is why I thought that it was a boost leak. After going crazy tightening every coupling I moved to something else, the fuel.
I honestly don't know much about the SAFC, I'm using DSM Link. I'll try to find some info for what may give you similar to my settings with the SAFC.

 

[oldman]

Don't give up, you are getting closer. I'm kind of tied up right now, I will go back and re-read the thread and see what else is missing sometime tomorrow. I'm in the same boat as BGGSTin in that I'm not yet familiar with safc but I believe he is on the right track. Let's wait and see if some expert tuner will chip in as I suspect, beside hardware issues, your car needs a good tune as well.

 

[BGGSTin]

Heres some info I found:There are two maps on the AFC. One is called the LO map and the other the HI map. Which map it uses is determined by the throttle position. When the AFC is initially set up, the throttle position for the LO and HI map is configured. The default is something like 30/60. This means the LO map values will be used exclusively from 0-30% throttle, then it will interpolate values between the LO and HI maps from 31-59%, then use the HI map exclusively from 60-100% throttle position. For a DSM application, it is easier to tune if the maps are either on or off, instead of mixing the values between them. Set the Th-Point to 69/70 so it uses the LO map up to 69% throttle and then goes to full HI map beyond that. This separates the maps into closed loop and open loop maps, making it easier to tune.

Initial SAFC Setup
A few installation tips first. Be sure to use the Pink and Orange wires for the airflow signal wires, and NOT the Yellow and White wires. The AFC is a universal device and is setup to handle both Speed-Density and Mass-Airflow type systems. The Pink and Orange wires are for Mass-Airflow systems like Mitsubishis

I'd say for the HI map, use something pretty similar to the settings that I have posted. For the LO map try them at like 1/4 of the percentages you will use for the HI map.
Try the HI/LO setting at 60/30 or so. Hopefully you get some better results, so just fine tune from there once you have a base; or you could have it fine tuned at a shop.
Whatever the outcome or questions you have, just let me/us know and I'll try to help you out some more.
Good Luck!

 

[shadowdrag]

Heres some info I found:There are two maps on the AFC. One is called the LO map and the other the HI map. Which map it uses is determined by the throttle position. When the AFC is initially set up, the throttle position for the LO and HI map is configured. The default is something like 30/60. This means the LO map values will be used exclusively from 0-30% throttle, then it will interpolate values between the LO and HI maps from 31-59%, then use the HI map exclusively from 60-100% throttle position. For a DSM application, it is easier to tune if the maps are either on or off, instead of mixing the values between them. Set the Th-Point to 69/70 so it uses the LO map up to 69% throttle and then goes to full HI map beyond that. This separates the maps into closed loop and open loop maps, making it easier to tune.

Hey thanks for the infos. Some time today on my study break, I will try messing with my car again. I have a midterm coming this week and its all about loops. ME352 Numerical Methods.

if throttle <=30
use this setting......;
elseif throttle <60
add these two together setting.....;
elseif throttle >60
use this other setting,....;
end
end
end

Thanks again
I will keep you guys updated

 

[BGGSTin]

Heres some info I found:There are two maps on the AFC. One is called the LO map and the other the HI map. Which map it uses is determined by the throttle position. When the AFC is initially set up, the throttle position for the LO and HI map is configured. The default is something like 30/60. This means the LO map values will be used exclusively from 0-30% throttle, then it will interpolate values between the LO and HI maps from 31-59%, then use the HI map exclusively from 60-100% throttle position. For a DSM application, it is easier to tune if the maps are either on or off, instead of mixing the values between them. Set the Th-Point to 69/70 so it uses the LO map up to 69% throttle and then goes to full HI map beyond that. This separates the maps into closed loop and open loop maps, making it easier to tune.

Hey thanks for the infos. Some time today on my study break, I will try messing with my car again. I have a midterm coming this week and its all about loops. ME352 Numerical Methods.

if throttle <=30
use this setting......;
elseif throttle <60
add these two together setting.....;
elseif throttle >60
use this other setting,....;
end
end
end

Thanks again
I will keep you guys updated

Programming?....Nice

But yeah, you have the jist of it now. Good luck with it, keep us posted

 

[shadowdrag]

WOW, WOW, I changed my Throttle Pt. LOW/HI--> from 30/70 to 30/60 and that made a huge difference.

My Hi's are:
1000=-11
1400=-13
2000=-16
2400=-16
3000=-18
3400=-26
4000=-28
4400=-28
5000=-29
-29 all the way til 7000.

Runs really good now after 3000 RPM, in between .65-.45V- O2Voltage. but still abit rich at 5000.


Oldman, BGGSTin and all others, thanks a whole lot for all the help and inputs.

I will post my 3rd gear pull. Now I need to now how to correct the timing. Timing gets pull to 10 and 11 at fully boost.

 

[shadowdrag]

Here is my 3rd gear log, I stop at 80+ mph:

RPM..........O2V..........Timing..........TPS
3171..........0.38.........12................92
3574..........0.47.........12................99
4125..........0.81.........12................99
4648..........0.85.........10................100
5144..........0.87..........9.................100
5527..........0.87.........12................29

I made some changes at 4k t0 7k already, but this is way better than before. Before it will just go to 0.98 3k all the way til 5500.

Car still seems kinda slow.

 

[shadowdrag]

Here is a second log 3gear:

RPM.......O2V.......Timing........TPS
2308......0.63.........15...........99
2652......0.07.........13...........99
2972......0.05.........9.............99
3422......0.87.........9.............99
3976......0.56.........13...........99
4492......0.14.........15...........99
5011......0.85.........13...........99
5441......0.87.........12...........99
5500......0.91.........34...........99

What is happening in this log?