New Issue

[SinCityFX4]

Ok, so I changed to monitor some different values. I have hte Gear Comm and TC monitoring along with the RPM's and TFT.

When I get the shudder it is usually in 2nd gear with the TQ converter locked and the TC showing a value of 5. Whatever that is??

[88Racing]

Okay I've used that feature before here is some of the values I remember. Level was at 0 stock.
These are upshfts.

1-2. #0
2-3. #5-7 briefly.
3-4. #0
4. #14 only with cruise on.

Lars

[Jackpine]

Any idea what those numbers mean, Lars? I've never monitored that particular readout.

SinCity - is it true we're talking about part throttle shifts here, or are you at WOT and hard acceleration? The reason I ask, is because my transmission spends so little time in 1st and 2nd gears under normal acceleration, that it's almost like they don't exist. I've NEVER seen the TC lockup in 1st or 2nd. I've seen it lock at times in 3rd, on the highway in a hill climb situation shortly before shifting back to 4th and that one tends to be a "harsh" shift.

Perhaps you'd benefit from my Custom Options settings:

1-2, 2-1 upshift/downshift: -2
2-3, 3-2 upshift/downshift: -3
3-4, 4-3 upshift/downshift: -5
1-2, 2-1 TC lock/unlock: -3
2-3, 3-2 TC lock/unlock: -5
3-4, 4-3 TC lock/unlock: -10

I may not have the TC values correct here for 1-2, 2-1 and 2-3, 3-2, but I set them at the MAX negative limits.

My reasoning was that I wanted to shift as rapidly as possible into 4th and have the TC lock up as soon as possible to save gas. I don't HAVE to beat everyone to the next light, I just want to flow with them. And, I wanted to delay the downshift/TC unlock for the same reason, in normal driving.

It all seems to work out fine for me. I get very quickly into 4th (at about 40 mph) and the over eagerness to downshift or get TC unlock at part throttle I've talked about in previous posts during mild hill climbs is largely gone. I even have these settings in place when I pull our trailer, and it somehow, feels better.

None of this effects WOT shifting though. The power's still there when I need it.

- Jack

[88Racing]

Originally Posted by JackandJanet

Any idea what those numbers mean, Lars? I've never monitored that particular readout.


- Jack

I have posted a thread before on these numbers. But I thought Bill might answer it. So I still remain with ?'s of what the values mean.

[SinCityFX4]

Originally Posted by my67rt

Hey SiCityFX4 I have a 07 F150 4.6 with an AFE CAI and my truck does the same backfiring thing when it is cold in the morning. I was told that it was from being too lean and that Bill would be able to fix it with my custom tune that he is making for me, but now I am nervous. I am staring to think that it is from the AFE brand CAI bc the only people on this site that are having the same problems as we are have an AFE CAI.

It has always hesitated if I put any kind of throttle when I first start it up with the VMP/PHP tunes. It has only backfired with PHP's. Just needs some tweakin .....email tuning is an impossibly hard thing to do.

Originally Posted by JackandJanet

AND, if you don't get this behavior at all with Justin's tune, then it DOES point to something that needs adjusting in Bill's tune, doesn't it? I'm sure he can fix it, once he knows it has to be fixed.



- Jack

Sure will...I will try and give em a call and see what we can dig up. Keep ya posted.

P.S.

PHP Rocks

[SinCityFX4]

Well, I just called the shop and the VM says they are out of the office for medical emegency.

BIll/Corey I hope you and the family are all ok

[Jackpine]

Oh crap, I hope so too.

I was beginning to get worried when I didn't see any posts from Corey these past few days, but then Bill showed up today.

Hope Corey's all right. She has a pretty tough road to travel on.

- Jack

[Power Hungry]

Originally Posted by SinCityFX4

Ok, so I changed to monitor some different values. I have hte Gear Comm and TC monitoring along with the RPM's and TFT.

When I get the shudder it is usually in 2nd gear with the TQ converter locked and the TC showing a value of 5. Whatever that is??

Torque Control Mode 5 = Spark Cut for Tip-In Shock Control

Here's the full TC Mode definition list:

00: No Torque Control Requested
01: Fuel Cut for Low Line Pressure
02: Fuel and/or Spark Cut for Traction Control
03: Fuel Cut for Speed Control
04: Fuel Cut for Rev Control
05: Spark Cut for Tip-In Shock Control
06: Fuel Cut for Decel
07: Spark Cut for Transmission Shift Contol
08: Fuel and Spark Cut for Excessive Engine Oil Temp
09: Fuel Cut for Excessive Engine Coolant Temp
10: Disable Current Torque Mode to Prevent Stalling
11: Fuel Cut for Turbo Control
12: Fuel Cut for Anti-Theft
13: Spark Cut for Tip-In Engine Lugging
14: ETC - Electronic Throttle Control only

Keep in mind that only highest priority (lowest number) TC mode takes precedence.

My guess is that what you're feeling might be related to a timing issue. This may also have something to do with the backfiring issue. Let me know which tunes this is occurring on and I'll make some changes to the timing tables which I think should resolve the problem.

Take care.

[88Racing]

That would make a great sticky Bill!

Thanks for posting them.

Lars

[Power Hungry]

Might make a better FAQ. I'll get them stuffed over in that section.