---===The Official MAFT-Pro Thread===---

[TurboBob]

Originally Posted by StealthES418

So I unplugged the narrowband and the car idled fine. A/F was steady. At WOT it was pretty lean (even with the mainscale set to 14 to compensate for the overclocked ECU) but a little tuning helped that out and the nitrous is jetted so rich the A/F was still below 10 with that.

I thought I was set and just needed a little tuning and to figure out the cold start issue until I got to Ocean City. The car was fine the whole 400 mile trip down there but once there the idle issue started again. At idle the RPM's would just drop and if I tried to hold the RPM's and let them down gently the A/F would fluctuate and the RPM's would surge and drop until it eventually would die. However, sometimes it would idle fine and the A/F would be steady.

I thought at cruise it was fine except for being a little rich. 6 hours into the trip home the car started missing and I noticed the A/F went from the usual 13/14 at cruise till 16/off the gauge. I pulled over to get some food and adjusted the mainscale and the low throttle at around 3000rpms and it was running more rich than before making me think I didn't even have to adjust them.

So...any ideas on what it could be? I really want to get this thing working but I've already been messing with it for a year and without any solid documentation it might be better to go another route.

One question I do have on settings is what should the VE's be set at..the defualt 2.5 and 4 or should they be set to 0? I've heard both in this thread.

Terry

On my car, when the O2's are unplugged, it runs really well. what is the correction factor doing during these wierd idle times?

I have an newer version that enables the part throttle tracking sooner, that might help some. Are you running Ve table #2?

Can you get a log and email me?

B

[TurboBob]

ok, that wideband should be set as follows.

Set the Pro or MAFT Gen-2 for the AEM gauge wideband.

Set the AEM gauge for P0 analog output.

Connect the orange wire on the Pro/Gen-2 to the white wire on the AEM
Connect the purple wire (from the 10 pin harness) to the AEM black wire, connect close to the gauge.

Do not make any connections to the ECM wiring with the orange or purple wires. Connect only to the AEM.

It should work correctly.

Bob

[Storm Strike]

Had the IAT hanging out by the air filters, but today I tapped the Y pipe and installed the IAT just before the BOV. (Had a thick plate welded in there to plug the stock BOV hole, and it was plenty thick enough to hold threads) Idle seems alot better so far. Will find out more tomorrow on a completely cold startup. The hang time on idle isn't the dashpot, I dont think. If I'm cruising along at say 30 MPH, and push in the clutch, the RPMs hang constantly just above 2k. When the vehicle speed drops down low enough, like when I'm coming to a stop, the idle won't hang like that. Something related to vehicle speed is making the ECU keep the RPMs hanging like that. I have to install some jumper wires on the harness so the ECU thinks the ABS is working, and see if that helps. Other than that, I'm very happy with the system so far.

[Highboosted]

Originally Posted by Storm Strike

Had the IAT hanging out by the air filters, but today I tapped the Y pipe and installed the IAT just before the BOV. (Had a thick plate welded in there to plug the stock BOV hole, and it was plenty thick enough to hold threads) Idle seems alot better so far. Will find out more tomorrow on a completely cold startup. The hang time on idle isn't the dashpot, I dont think. If I'm cruising along at say 30 MPH, and push in the clutch, the RPMs hang constantly just above 2k. When the vehicle speed drops down low enough, like when I'm coming to a stop, the idle won't hang like that. Something related to vehicle speed is making the ECU keep the RPMs hanging like that. I have to install some jumper wires on the harness so the ECU thinks the ABS is working, and see if that helps. Other than that, I'm very happy with the system so far.

That high idle hang happens when the ABS is kaput. Mine did it, so I reinstalled the ABS computer and broke the front wheel speed sensor so the ABS stays off. It would hang at like 1,800 RPMS while at any speed above like 10 mph. Once I slowed past 10 the idle dropped back to normal. Don't think jumpers will fix it.

[Maximal]

Originally Posted by TurboBob

On my car, when the O2's are unplugged, it runs really well. what is the correction factor doing during these wierd idle times?

I have an newer version that enables the part throttle tracking sooner, that might help some. Are you running Ve table #2?

Can you get a log and email me?

B

Well my mainscale is +14 to compensate for the overclocked ECU. To be honest I've tried just about every tune on the low throttle to try to get it to work. It runs really rich normally and at one point I had it to -40% or so and it was still a little rich. That's another thing that doesn't seem right.

Yes, I'm running VE Table 2.

I can try to get a log at idle but it's not going to be easy the way it's running now.

Any other ideas?

Terry

[DriveFast99]

hey im having a hard time trying to get the tunerpro to log. it wont connect, any ideas of to how i might be able to fix that? my xdf file is tpro4600, the datastream file is tpro4600.ads, and i created a new file called log1.adl. then when i go to connect it say cannot connect.

[Maximal]

Car doesn't idle at all now...not even occasionally. I changed the vehicle from 2 to 0 and it idled for a while but started doing the same thing after a little while. Anyways...attached is the log and bin file...hopefully you can tell me something from them. I appreciate any help I can get.

Terry

[TurboBob]

Originally Posted by StealthES418

Car doesn't idle at all now...not even occasionally. I changed the vehicle from 2 to 0 and it idled for a while but started doing the same thing after a little while. Anyways...attached is the log and bin file...hopefully you can tell me something from them. I appreciate any help I can get.

Terry

set your MAP TPS min higher. Your MAP compensation is triggering at idle.

B

[TurboBob]

Originally Posted by DriveFast99

hey im having a hard time trying to get the tunerpro to log. it wont connect, any ideas of to how i might be able to fix that? my xdf file is tpro4600, the datastream file is tpro4600.ads, and i created a new file called log1.adl. then when i go to connect it say cannot connect.

2 things cause this.

1, the aldl logging interface must be set to translator pro. its in the tools/preferences menu, aldl emulation tab

2, if you accidentally opened the .ADS file and clicked save and close. The baud rate in the ads file gets saved wrong. It should be 19200. You can open the file and correct it, just be careful......

Bob

[OwnGTP/WantRTTT]

Hopefully somebody can shed some light here. I'm getting a REALLY nasty lean spot right around ~2900 RPM during light acceleration (at WOT or even moderate load it isn't there). I've added fuel at both RPM points on either side and the car still goes full lean (>18.0:1) and you can feel it lose power for that split second, then about say ~3100 it goes back to normal. Happens everytime I accel and I can't figure it out. Thanks.