---===The Official MAFT-Pro Thread===--- - Page 32 - 3000GT/Stealth International Message Center

runner4053 · 10-11-2005, 11:09 PM

Okay got my log done. I have to learn how to post a file before I can show you though. There is a correlation between my 02 volts and my funky idle. I think you're on the right track.

Rustang Cobra · 10-12-2005, 07:56 AM

the car idles funky whens its either too lean or two rich

when its too lean the tach tends to bounce around for a few seconds and then just stall out (bounces from 600-1800 rpm)

when its rich, the tach bounces the other way, it'll go (1100-300) and keep goin back and forth between the two and then stall out

Rustang Cobra · 10-12-2005, 07:59 AM

i think the 02 trim and lo trim will tell the story for us

Barefoot · 10-12-2005, 10:54 AM

Quote:

Originally Posted by TurboBob

Your closed loop is not enabled at that point it sounds like. 100% is no correction. 105% is adding some fuel. 95% is removing some fuel.

What are your AFR tracking enable settings?

Bob

sorry it took so long, but..

im not sure what exactly you need, so here are a few things that may help.

AFR enable TPS 4.96
AFR enable RPM 3008.00
AFR enable MAP 132.68
AFR correction lean limit 15.00
AFR correction rich limit 15.00
AFR correction gain 20.00

runner4053 · 10-12-2005, 02:27 PM

here's the translated version of the log.

TurboBob · 10-12-2005, 04:12 PM

looks like your idle is too rich. But that log translation seems odd, since the lowest trims should go is 81 or 82

take a log while cruising and see where your o2 trim hangs out, if is much under 100, then lean the Mainscale value by 5%. If the cruise O2 trims are around 100 (they waggle around, but you will see an average) then lean the idle out 5% (low load page, 800 RPM. Change 400 RPM to match and put half of the change in the 1200 rpm spot)

Note: when trying to tune trims, I have found that trims are about 4X the actual percentage. So to make a trim of 80 move to 100, lean the tune by 5%.

Bob

Barefoot · 10-12-2005, 05:29 PM

Quote:

Originally Posted by |4x4 NV|

Quote:

Originally Posted by TurboBob

Your closed loop is not enabled at that point it sounds like. 100% is no correction. 105% is adding some fuel. 95% is removing some fuel.

What are your AFR tracking enable settings?

Bob

sorry it took so long, but..

im not sure what exactly you need, so here are a few things that may help.

AFR enable TPS 4.96
AFR enable RPM 3008.00
AFR enable MAP 132.68
AFR correction lean limit 15.00
AFR correction rich limit 15.00
AFR correction gain 20.00

Anyone? please?

TurboBob · 10-12-2005, 05:59 PM

Quote:

Originally Posted by |4x4 NV|

Anyone? please?

I was thinking Rustang was going to jump in here..... He has his working really well.

Your TPS enable is too high. Set it to about 1.3 volts or so.

Bob

runner4053 · 10-12-2005, 08:29 PM

It didn't work. I tried what you said. Here's a log with the changes. By the way, I found that i forgot to zero the mid and hi tunes I set earlier. I zeroed everything and set my main scale to +5.0 and leaned my idle -5.0@400 , -5.0@800 , -2.5@1200 .

TurboBob · 10-12-2005, 08:49 PM

that log looked better.

try "less lean" at 400 RPM

and a few percent richer at 400 RPM (mid load)

My car is very stable idling, but this is how to tune it in.

Bob

10-11-2005, 11:09 PM	#311 (permalink)
runner4053 the car whisperer Join Date: May 2003 Location: Univ. of Illinois Drives: 96 RT/TT Trader Rating: (4)	Re: ---===The Official MAFT-Pro Thread===--- Okay got my log done. I have to learn how to post a file before I can show you though. There is a correlation between my 02 volts and my funky idle. I think you're on the right track. __________________ 96 RT/TT It lives again. major performance mods: DR1000's, FMIC, MAFT-PRO speed density, 720 cc, supra pump with hotwire, Fuellab FPR, billet rails, ported heads, 1mm over intake and 1 mm over iconel exhaust valves. spec 3+ clutch, fidenza flywheel, 2 piece Al driveshaft, Supercar baffled oil pan, relocated battery, custom exhaust, reinforced bellhousing, 3sx poly motor mounts, intrax with GR-2, lots' of little things. ................and 18" chromies........

10-12-2005, 07:56 AM	#312 (permalink)
Rustang Cobra I think my cars drunk... Join Date: Jul 2003 Location: Lexington, MA Drives: girls crazy Trader Rating: (31)	Re: ---===The Official MAFT-Pro Thread===--- the car idles funky whens its either too lean or two rich when its too lean the tach tends to bounce around for a few seconds and then just stall out (bounces from 600-1800 rpm) when its rich, the tach bounces the other way, it'll go (1100-300) and keep goin back and forth between the two and then stall out __________________ 2003 Nissan 350z - New toy 1993 Stealth Twin Turbo - Sold Old Dyno w/15gs- 404awhp/398awtq @17psi mustang dyno - SOLD 1998 Mustang cobra - RIP Dyno 275rwhp/278rwtq 92 Honda Civic CX Hatchback - Winter beater

10-12-2005, 07:59 AM	#313 (permalink)
Rustang Cobra I think my cars drunk... Join Date: Jul 2003 Location: Lexington, MA Drives: girls crazy Trader Rating: (31)	Re: ---===The Official MAFT-Pro Thread===--- i think the 02 trim and lo trim will tell the story for us

10-12-2005, 02:27 PM	#315 (permalink)
runner4053 the car whisperer Join Date: May 2003 Location: Univ. of Illinois Drives: 96 RT/TT Trader Rating: (4)	Re: ---===The Official MAFT-Pro Thread===--- here's the translated version of the log.

10-12-2005, 04:12 PM	#316 (permalink)
TurboBob Resident mad scientist Join Date: Jan 2003 Location: Near Detroit Drives: 86 GN 91 RT/TT Trader Rating: (17)	Re: ---===The Official MAFT-Pro Thread===--- looks like your idle is too rich. But that log translation seems odd, since the lowest trims should go is 81 or 82 take a log while cruising and see where your o2 trim hangs out, if is much under 100, then lean the Mainscale value by 5%. If the cruise O2 trims are around 100 (they waggle around, but you will see an average) then lean the idle out 5% (low load page, 800 RPM. Change 400 RPM to match and put half of the change in the 1200 rpm spot) Note: when trying to tune trims, I have found that trims are about 4X the actual percentage. So to make a trim of 80 move to 100, lean the tune by 5%. Bob __________________ Need a datalogger? Check out the Scanmaster 3 PM me about ECU mods for 8000+ RPM rev limits !!!!!!!! Stock = 7300 RPM Stage 1 = 8060 RPM Stage 2 = 8200 RPM Stage 3 = 8400 RPM Stage 4 = 8800 RPM (By request only) 1991 Stealth RT/TT, Grooms Shortblock, 13G's. My Stealth is for sale, 65000 miles, runs perfectly. $6,500 (a bargain)

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10-12-2005, 08:29 PM	#319 (permalink)
runner4053 the car whisperer Join Date: May 2003 Location: Univ. of Illinois Drives: 96 RT/TT Trader Rating: (4)	Re: ---===The Official MAFT-Pro Thread===--- It didn't work. I tried what you said. Here's a log with the changes. By the way, I found that i forgot to zero the mid and hi tunes I set earlier. I zeroed everything and set my main scale to +5.0 and leaned my idle -5.0@400 , -5.0@800 , -2.5@1200 .

10-12-2005, 08:49 PM	#320 (permalink)
TurboBob Resident mad scientist Join Date: Jan 2003 Location: Near Detroit Drives: 86 GN 91 RT/TT Trader Rating: (17)	Re: ---===The Official MAFT-Pro Thread===--- that log looked better. try "less lean" at 400 RPM and a few percent richer at 400 RPM (mid load) My car is very stable idling, but this is how to tune it in. Bob

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