SERT Question

[DevilDog]

I also posted this on the other side of the pasture fence. And it is BullHurley's bike that we are troubleshooting. I know he posted about it, and this has more specific information for those that know about the SERT.

2003 Ultra
Stage II 95"
SE Air Cleaner
SE-204 cams
Rinehart tru-duals with race baffle.

The bike runs great when its warmed up, Until then it will die 2 or 3 times. We did data collection, using the SERT software and it looks like its running CAL 10SEV100 file name: 10SEV100-D0.MT6 which is the "canned map" for:

Calibration #10: 2002 – 2005 Touring, 2001 – 2003 FLSTSi and 2005 FLSTSCi
Configuration: 1550 Stage 2
File Name: 105EV100-D0.MT6, 127EV100-B0.MT6
Components:
• SE Air Cleaner and Breather Kit P/N 29440-99B
• SE 1550 Big Bore Cylinders P/N 16546-99 or 16549-99
• SE 1550 Flat Top Pistons P/N 22851-99A
• SE 203 Cams P/N 25937-99B
• SE Performance Touring Mufflers P/N 65115-98B or 65116-98A


I believe that the issue the bike is having is from running the CAL for the 203 cam with SE cans, and the bike actually has 204's with a Rinehart full exhaust.

SE203
Lift @ valve Intake/ Exhaust: (.510”/.483”)
Duration @ .053 Intake/ Exhaust: (234°/239°)
Timing @ .053 lift Open/Close:
(Intake: 18° BTDC/36°ABDC
Exhaust: 42°BBDC/17°ATDC)

SE204
Lift @ valve Intake/ Exhaust: (.508”/.508”)
Duration @ .053 Intake/ Exhaust: (236°/240°)
Timing @ .053 lift Open/Close:
(Intake: 22°BTDC/34°ABDC
Exhaust: 52°BBDC/08°ATDC)



Is there anyone running the same setup on a 2003 touring bike? If so what CAL are you running?

Or if anyone has an idea of what variable would need to be adjusted to correct this issue.

[Dave63]

Dave,
Have you checked here?

http://www.mastertune.net/SERTUpgrade.html

[DevilDog]

Dave,
Have you checked here?

http://www.mastertune.net/SERTUpgrade.html

That looks like it gives you bunch more options for tuning........ things that make you go hmmmm

[DevilDog]

Well today before we took off from work, we connected to the data port and captured data in hopes that we could catch it die during warm up. We were successful and this is what we noticed happened:

It looks like shortly after the "warm-up Fuel AFR" goes to 0.0, the Accel Enrichment increases from 0.00 to .24 then Spark Adv Front/Rear goes from 22.00 degrees to 4.00 degrees, IAC Position goes from 83 to 126 then bike dies. Like stated before, the bike runs fine after it is warmed up, but the rpm's keep bouncing from 1100 to 800.

Anyone have any ideas ??

[Boss]

Has he considered taking it in and having it professionally tuned? I'm not doubting your skills and ability but they might be able to detect something else like a sensor.

[DevilDog]

Has he considered taking it in and having it professionally tuned? I'm not doubting your skills and ability but they might be able to detect something else like a sensor.

Oh that is his plan to have it dyno-tuned. He received the build sheets and dyno paperwork from Gainesville HD and we are just now figuring out that a "canned map" was loaded and they dyno'd it and that was it. Don't get me wrong, the bike runs great... its just during warm up it kinda acts like my old shovel and will not do anything until completely warmed up. And you can count on it dying at least twice during warm up. Hurley plans on getting it professionally tuned as he would as most bagger owners like to see his torque lower on the rpm band and stay longer. This is cam dependent but a good tuner as you know can unharness loads of hidden power in these twinkies.

Both BullHurley and I are engineers so by nature we are anal, so even though he will be getting a dyno tune in the future this kinda gives us a problem to solve until then. Plus a great way to learn the tuner itself. He is reading on multiple forums about custom maps and CAL files so this is a learning process for both.

All the readings from sensors are normal, and no running or historical codes are present. And readings are normal when the bike is at Idle both in during warm up and after warm up. Its just a split second before it dies, we see a sequence of events. 1) warm up afr ratio goes to 0.0 meaning the end of the warm-up cycle. 2) the Accel Enrichment increases from 0.00 to .24 3) Spark Adv Front/Rear goes from 22.00 degrees to 4.00 degrees 4) IAC Position goes from 83 to 126 5) bike dies.

Kinda looks like its pulling too much timing for some reason. That is why we are hoping either a HD tech or someone that is like yoda on the SERT/SEST can give us some input or feedback. Cause it would be nice to understand this system and be able to go back and see what the tech did after the tune.

[Boss]

Sounds like you both are on track and have a good plan. I wish I had some of the skills that most you fellers have in here! Sorry to here you both are anal... LOL

[DevilDog]

Sorry to here you both are anal... LOL

Yeah it causes a lot of extra work sometimes. But pretty much a required trait in our profession.