Newbie - need help tuning

patriotstang · Post by **patriotstang** » Tue Jul 28, 2015 8:15 pm

90 mustang 347 w/turbo 60lb inj. I have installed the MSPNP. I have the car running and idling now, however the car will go fuel rich just off idle or tapping the throttle. The car will also accell to roughly 3000 rpms then starts studdering. I have played with the timing, pullng out to alot to almost none. Didnt seem to make much difference. I am not completely understanding the TPS based AE, etc... My MAP base AE will not allow me to make adjustments to it. I am also not sure how to adjust the Accel Enrichment DOT to the TPS dot blend. My first thoughts is I have my timing chart out of wack, but this is where I need the help. Thanks!

elutionsdesign · Post by **elutionsdesign** » Wed Jul 29, 2015 8:26 am

Well full rich would be a fuel condition, what are you using for a wide band O2 sensor?

patriotstang · Post by **patriotstang** » Wed Jul 29, 2015 8:27 am

Autometer digital wideband, which adjustment exactly do I adjust to lean it out?

Laminar · Post by **Laminar** » Wed Jul 29, 2015 8:36 am

I'd try and start simpler - lock your timing at 20 degrees, disable acceleration enrichment, and tune your VE table under steady throttle conditions. You should be able to gradually add throttle without pegging rich. Once your base tune is dialed in, begin adding small amounts of acceleration enrichment to keep your AFR steady under faster pedal movements. Stick with purely TPS-based accel at first.

It's common for boosted applications to have timing locked anywhere from 17-25 degrees or so. Get everything else dialed in before you add an additional variable of timing.

http://forums.corral.net/forums/turboch ... d-out.html

patriotstang · Post by **patriotstang** » Wed Jul 29, 2015 8:38 am

Great info, thanks

patriotstang · Post by **patriotstang** » Wed Jul 29, 2015 6:44 pm

Adjusted timing to 18, locked it out. I am still a little confused on adjust tp enrichment. Tap the throttle and it still swings full rich. What kind of changes or ranges does the TPS based accel need to be around and then below that graph is the slider for accel enrichment map dot, what is the relationship of adjustment between the two? Does anyone use the auto VE adjustment? How exactly do you add throttle enrichment? Sorry for all the questions!

Laminar · Post by **Laminar** » Thu Jul 30, 2015 6:51 am

You'll want a solid base tune before you start trying to dial in AE. Turn it off completely and adjust your VE table so that at steady throttle positions you're hitting your AFR target as expected.

From page 66 of the Setting Up manual:

Before you start tuning the acceleration enrichment, make sure your VE tables are dialed in.
Adding a correctly tuned amount of acceleration enrichment to an incorrectly tuned fuel table is still going to
result in an incorrect amount of fuel. Since the acceleration enrichment is stacked on top of the fuel the ECU
is commanding based on the VE table, you’ll want to tune AE last, after you’ve got the solid foundation of a
well tuned VE table under you.

I had good success with the autotune feature. I configured my AFR Target table and spent a few hours over several days driving around with autotune turned on. It adjusts the VE table so that you're hitting your target AFRs.

patriotstang · Post by **patriotstang** » Thu Jul 30, 2015 6:55 am

Forgive my ignorance, how do you turn off the AE?

Laminar · Post by **Laminar** » Thu Jul 30, 2015 6:57 am

Accel Enrich → Accel Enrichment Settings. Set Low RPM Threshold to 0 and High RPM Threshold to 100rpm.

patriotstang · Post by **patriotstang** » Thu Jul 30, 2015 6:59 am

Do I need ego active?

Laminar · Post by **Laminar** » Thu Jul 30, 2015 7:03 am

The general consensus is that if you plan to run EGO correction under normal conditions, have it enabled while you're running AutoTune. If you don't plan on using EGO normally, leave it off during AutoTune.

patriotstang · Post by **patriotstang** » Thu Jul 30, 2015 7:04 am

I only have the wideband hooked up. Is it recommended to have it on or off?

Laminar · Post by **Laminar** » Thu Jul 30, 2015 7:19 am

I chose to keep EGO correction turned off while autotune to reduce the number of factors affecting my fueling.

patriotstang · Post by **patriotstang** » Thu Jul 30, 2015 7:21 am

Ok, I will be headed to a dyno tomorrow for tuning, hopefully all goes well

patriotstang · Post by **patriotstang** » Thu Jul 30, 2015 7:42 pm

Timing question, instructions says to remove the spout to lock the initial timing. My car will not start with it out. I used a digital advanced timing light and set it to 20, then aligned balancer to tdc while running. Then I locked the ignition setting to 20. Was that the correct procedure?

Matt Cramer · Post by **Matt Cramer** » Fri Jul 31, 2015 5:32 am

With TFI, your minimum timing is the timing with the SPOUT unplugged plus one degree. You'll want to set it to something more like 10 degrees with SPOUT out.

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