---===The Official MAFT-Pro Thread===--- - Page 31 - 3000GT/Stealth International Message Center

TurboBob · 10-10-2005, 10:40 AM

Quote:

Originally Posted by runner4053

I had a bad vacuum source. I was using a Y-pipe nipple. Switched to a plenum source, runs now. I adjusted something from 4.000 to 4.500 and it idles and runs decently now. Thanks, now I have to get to tuning.

did you ever figure out what this was......?

by turning the BARO setting up you richened it.

One issue is that the trims adjust slowly, and if the ECU thinks things are funky (like someone 'tuning') it can stop updating the trims until the next drive cycle. If the idle is not where the ECU likes it, it gives up and runs open loop which could account for the 11:1. If the trims run out of adjustment range, the ECU gives up and runs open loop.

You should at least reset your ECU, and set the Pro to its base settings.
When you make changes larger than 5% or so you should drive around a little to give the ECU time to 'get happy'.

Find your logger cable if possible, and see where you are.

Bob

runner4053 · 10-10-2005, 10:48 AM

How do I reset my ECU?

edit: are you free for a phone call?

TurboBob · 10-10-2005, 10:56 AM

Quote:

Originally Posted by runner4053

How do I reset my ECU?

edit: are you free for a phone call?

There is a fuse under the dash that feeds power to the ECU..... Check on www.stealth316.com for a picture (Many thanks to Jeff Lucius!!)

PM sent.

Bob

DriveFast99 · 10-10-2005, 12:56 PM

ok have a question about air temp. if i change the percentage on the air temp will it run richer or leaner based of the temp?

TajMan · 10-10-2005, 01:27 PM

I've got a LS6 MAF I'm selling if anyone is looking for one to use with the MAFT Pro.

TurboBob · 10-10-2005, 01:37 PM

Quote:

Originally Posted by DriveFast99

ok have a question about air temp. if i change the percentage on the air temp will it run richer or leaner based of the temp?

+ is richer. But the Pro already does temperature compensation. Any compensation you add will be in addition to the Density calculation the Pro is already doing.

Bob

Barefoot · 10-10-2005, 06:47 PM

i have a question regarding closed loop correction..

i ran at the track this weekend and set closed loop correction to 12.5 (varying based on RPM)

upon recording and reviewing, i noticed that the the closed loop correction (dont remember the exact name of the graph, but i think it was for the closed loop correction) was at 100 the whole graph, when i was not running the target AFR

what would i need to do to fix this? or was i even looking at the right graph?

TurboBob · 10-10-2005, 07:18 PM

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

runner4053 · 10-10-2005, 09:55 PM

I found my datalogging cable and palm pilot. I have to download the program and drivers again. When I get it up and running, what should I log? 02 trims and what else?

TurboBob · 10-10-2005, 10:24 PM

lo mid and hi trims
o2 trim
o2 voltage
throttle position
airflow hz
rpm

also, at least check the air temp and baro readings.
air temp should be around 77 degrees F, Baro around 98 - 100 Kpa

I think thats a good start

Bob

10-10-2005, 10:48 AM	#302 (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===--- How do I reset my ECU? edit: are you free for a phone call? __________________ 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........

10-10-2005, 12:56 PM	#304 (permalink)
DriveFast99 I bet you didn't know! Join Date: Jun 2003 Trader Rating: (7)	Re: ---===The Official MAFT-Pro Thread===--- ok have a question about air temp. if i change the percentage on the air temp will it run richer or leaner based of the temp? __________________ 15G/Custom Dual Intakes/IPS FMIC/HKS SSQV/ATR Downpipe/ATR Single Shot/RC 580cc Injectors/Denso Supra Pump/SX AFPR/SX High Flow Fuel Filter/EK2 Fuel Rail Loop/Vac Reduction/3sx EGR Plates/MSD Wires/NGK R5671A-9/Maft-Pro/Blitz SBC-iD/AEM Wideband/Tein S-Tech

10-10-2005, 01:27 PM	#305 (permalink)
TajMan - Join Date: May 2002 Location: Highlands, NJ Drives: Z28 Trader Rating: (25)	Re: ---===The Official MAFT-Pro Thread===--- I've got a LS6 MAF I'm selling if anyone is looking for one to use with the MAFT Pro. __________________ former 3/Ss: '92 R/T, '94 3KGT, modded '92 R/T TT 93 Stealth base '94 Camaro Z28 convertible - buy me 56% of book value!

10-10-2005, 06:47 PM	#307 (permalink)
Barefoot Racing Join Date: Jan 2003 Location: Ga Tech Drives: 92R/T - converted ;) Trader Rating: (31)	Re: ---===The Official MAFT-Pro Thread===--- i have a question regarding closed loop correction.. i ran at the track this weekend and set closed loop correction to 12.5 (varying based on RPM) upon recording and reviewing, i noticed that the the closed loop correction (dont remember the exact name of the graph, but i think it was for the closed loop correction) was at 100 the whole graph, when i was not running the target AFR what would i need to do to fix this? or was i even looking at the right graph? __________________ 92 Dodge Stealth R/T AWD/TT (TD05) converted ( 11.894 @ 120.56 - 18 psi -> Video )

10-10-2005, 07:18 PM	#308 (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===--- 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

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10-10-2005, 09:55 PM	#309 (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===--- I found my datalogging cable and palm pilot. I have to download the program and drivers again. When I get it up and running, what should I log? 02 trims and what else?

10-10-2005, 10:24 PM	#310 (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===--- lo mid and hi trims o2 trim o2 voltage throttle position airflow hz rpm also, at least check the air temp and baro readings. air temp should be around 77 degrees F, Baro around 98 - 100 Kpa I think thats a good start Bob

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