New Issue
 

Ok, this is hard to expalin but here we go. The tranny does like these new tunes. The 1-2 shift rarely feels smooth and almost seems to bind up sometimes. Sometimes under light throttle it almost feels like the engine is bogging down but the RPM's are not altered. It is very wierd. THe other day it did it on the highway so bad I thought I had a flat tire and I had to pull out of traffic. Thats how rough it was. But the RPM's were fine staying around 1800.

I flashed it back to stock and drove 2 tanks through it and no problems. I flashed the 87 perf tune back in and 2 days later it started again. THe tranny issues are always there for some reason, but the engine/tranny stutter is not cool.

No DTC's, safe mode, or any form of error signals.....

At a loss here....

A side note the other am when I was leaving the house 1st thing it backfired up front. Sounded like it came from the intake but I was half awake and could not really tell.


Need some help on this one guys...gonna flash back to my VMP tune until I can get this resolved...

Perf wise my Mods are AFE CAI, SIDO Super 40's, Livewire (VMP-Troyer/Gryphon (PHP) depending on whose tune I am running.

What do you have everything set up at?
What's the torque coverter doing? What's on the display?
What's the shift firmness setting at?

Lars

I have altered nothing from how Bill sent the tune. I will monitor the gear to check for shifting/TC issues. WHat other PID's could I utilize to better diagnose this issue?

The edge/gryphon software/settings is new to me..

Interesting, I was just reading a tech article about TC hard lockup issues and they pointed out that its not always TC/ trans issue
"A simple random misfire
could prevent the PCM from engaging
the converter clutch, and there need not
be a DTC set for this to occur. Yet openloop
scenarios, faulty ECT sensors and
VSS problems are still the familiar reasons
for a loss of TCC. A more sophisticated
TCC apply strategy provides additional
possible causes for its malfunction"

Probably not you case but you may want to PM Cody and see if he has any ideas...

I don't think he's got a diesel, southpaw.

But, it works good for a while and then goes south?

I suspect, sadly, this is another job for the Mad Doctor!

- Jack

THe tranny always does not shift good from 1-2 at any load and sometimes 3-4 under light-moderate load.

The bizarre shudder wtf deal happens every now and then.

I tried PM'ing Bill. We'll see.

Update
 

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??:shrug:

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

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

I'm probably not going to be a huge help on this, but I will throw in my $.02.

The backfire you describe can be one of two things.

1. Lean condition. The mixture is lean enough that it's burning slowly and still "on fire" when the intake valve opens again. It's common in a carbureted vehicle to exhibit this same condition when overly rich as well since the extra fuel will pool up (become a liquid again) and cause a lean condition. Since it's hard to get THAT rich with an EFI vehicle unless the ECT sensor is open and giving a reading of -40 degrees...........


2. Exhaust valve not opening. I doubt this is the case since you don't have any other engine related problems.

Your transmission issue really sounds like a shift timing problem, but it's difficult to get the PCM to command 2 gears at once without it knowing about it.

The 1-2v shift is rarley smooth as it should be regardless of throttle level. The serious shudder issues are always under light-moderate throttle and never at WOT. Honestly I am afraid it will cause an issue so I have not been at WOT for the last few days. It did it again where it shuddered REAL hard from 1-2 at light-moderate throttle coming through a rolling stop at a stop sign. My 10 year old looked over and asked "dad, what the heck was that?":disbelief:

Flashed back to stock and loaded up my VMP tune. Hopefully I can get answer from Bill. Til then the PHP tune will have to sit on the shelf. I dont have 15k on my truck yet and do not want to shorten the tranny lifespan.:(

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. :confused:

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

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.

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 :2thumbs:.....email tuning is an impossibly hard thing to do.

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

P.S.

PHP Rocks:cool_beans:

PHP Out of Office...
 

Well, I just called the shop and the VM says they are out of the office for medical emegency.:yikes2:

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

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

Wonder if her allergies finally got the best of her?

Hopefully everythings ok with everyone.

Lars

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.

That would make a great sticky Bill!

Thanks for posting them.

Lars

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

Thanks again Bill!

Lars

Dude...I totally saved that list as a datafile for future reference:cool_beans:

I sent you a PM with some info....I can data-log if that will help you out to save time. Thx Bill!!!!:2thumbs: