What the heck?
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What the heck?
Ned some help guys. I run the DPtuner F5 chip and have several of Jody's tune. My truck has 41 inch tires and Jody set up the shifting with this in mind. It has been flawless. He has the shift points set right where they need ed to be. Well yesterday I lut new batteries in my truck (Optimas) as my old ones were in need of replacement. Upon the first time driving after I installed the new batts. the shift points have reverted to the stock shift points????????I can not understand how a programmed shift can just be erased??The transmission shifgts in every gear and overdrive just fine but shifts way too early now because it has gone back to stock configure. Anybody ever heard of this??Losing a program just because of a battery swap? I will attempt to call Jody Monday to see what they tell me but this blows me away. Any thoughts on this would be helpful...Before the battery swap everything is working flawless, after the swap the hprsepower settings are still there but the shift pattern has gone back to stock. What gives???Maxx
Post Fiend
Joined: Apr 2004
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From: Silver Lake Dunes, MI
Unhook the batteries again for 30 minutes. Hook them back up then go out and drive the truck like you stole it. Even though everyone (who should know better) say our PCM's don't learn they do learn trans shift strategies. you have just experienced it!
Hotshot
Joined: Oct 2003
Posts: 17,799
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From: Ashland City, TN
I've read that sparking the terminals hoooking up a battery can cause chip issues, but I don't believe that one.
Thanks for good info tim. I didn't know the e4od's did any learning. Was that with the obd2 upgrade on our trucks? Or for all model years?
Thanks for good info tim. I didn't know the e4od's did any learning. Was that with the obd2 upgrade on our trucks? Or for all model years?
Posting Guru
Joined: Nov 2007
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From: West Texas
That is the only reason I can think of for a Banks chip frying last time I worked on my friends truck. I didn't go near the PCM. All I did was unhook the batteries, replace the glow plugs and hook them back up. After I hooked them back up I was getting no ground on the GPR. I further tracked it down to the chip had just fried. ONce I took the chip out the GPR got ground again when we turned the key on. Go figure.
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I like to post solutions to my problems if possible. I contacted Dptuner and told them my situation about reverting to stock shift patterns. They told me that, yes our trannys have "somewhat" of a learning capability but when Jody programs the shifts he turns that capability off. They suggested just driving it bit to see if it comes around. After a 10 minute drive, I notice the shift pattern starting to return and by the time I got back to the house the shift pattern was back to normal. Dptuner said unhooking batteries should not have affected the chip??Maybe it was a fluke but at any rate for the time being it is back to normal. Thanks for the replys guys..........Maxx
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Post Fiend
Joined: Apr 2004
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From: Silver Lake Dunes, MI
Thanks for posting the solution! When stuff like that happens I know the feeling on dread as to what might have happened! Been there done that after I swapped PCMs in my truck. I thought What have I done to the trans! I just drive them hard after I do stuff like that and it whips them back into shape! Glad you didn't have to do any more work other than drive it.
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Problem back again!!!Pulled out the drive and the crappy stock shift points have come back! I dont get it. The shifts were working perfectly again (DPtuner shift points) and now all of a sudden the shifting has changed back to stock. All tunes still have the HP settings but the shifting has gone bye bye again. Is there a sensor that could be causing this? Thought about changing the VSS but not sure. Any suggestions to this situation. Any other sensors that could have a direct effect on tranny shifting. Thanks Maxx
Post Fiend
Joined: Nov 2003
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From: Nutter Fort, WV
Any chance the temps are close to what you were seeing when this happened the first time?
I am running a DP Tuner F 8 and very low temps change my shift points.
Mine usually go the other way though, much higher than normal.
I am running a DP Tuner F 8 and very low temps change my shift points.
Mine usually go the other way though, much higher than normal.
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Sort of ruled out temp. This has happened at a wide range of temps. When its right I can just drive out the driveway whether its a cold morning or warm. At first I thought maybe the tranny had to warm up, but even after a 15 minute drive the stock shifting had remained. The ONLY way we have been able to get the DPtuner shifts back is to do some fairly hard accelerations and that seems to eventually get the shifting back right with the world. I just dont want to have to put up with this all the time. The way I see it, the shifting should be the same 100% of the time, not stock shifting one day and Dptuner shifts the next. I do have a call in to Jody again to get his opinion. Thanks
Post Fiend
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From: Orrville, Ohio
I am going to ask a somewhat off the wall question as a stab in the dark here. How new are the batteries in your truck? I am asking because I know some here are of the opinion that these PCMs do, in fact "learn" the driving style of the driver and adjust the shift points accordingly.
Here is why I ask about the batteries. Other Ford vehicles I have had would start to exhibit a strange symptom when the batteries were getting weak. On the '99 F-150 I had, the gauges would all peg to max, sweep back to minimum, then finally, go to their accurate reading. They did this because the voltage of the electrical system would drop below a minimum threshold when starting the engine and it would essentially "reboot" the PCM in that truck. The gauges were just doing those funky readings as the PCM rebooted.
Is it possible that your transmission shift points are being reset in the PCM for a similar reason? It may be a long shot, but I thought I'd add my $.02.
Here is why I ask about the batteries. Other Ford vehicles I have had would start to exhibit a strange symptom when the batteries were getting weak. On the '99 F-150 I had, the gauges would all peg to max, sweep back to minimum, then finally, go to their accurate reading. They did this because the voltage of the electrical system would drop below a minimum threshold when starting the engine and it would essentially "reboot" the PCM in that truck. The gauges were just doing those funky readings as the PCM rebooted.
Is it possible that your transmission shift points are being reset in the PCM for a similar reason? It may be a long shot, but I thought I'd add my $.02.
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Senior User
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I am going to ask a somewhat off the wall question as a stab in the dark here. How new are the batteries in your truck? I am asking because I know some here are of the opinion that these PCMs do, in fact "learn" the driving style of the driver and adjust the shift points accordingly.
Here is why I ask about the batteries. Other Ford vehicles I have had would start to exhibit a strange symptom when the batteries were getting weak. On the '99 F-150 I had, the gauges would all peg to max, sweep back to minimum, then finally, go to their accurate reading. They did this because the voltage of the electrical system would drop below a minimum threshold when starting the engine and it would essentially "reboot" the PCM in that truck. The gauges were just doing those funky readings as the PCM rebooted.
Is it possible that your transmission shift points are being reset in the PCM for a similar reason? It may be a long shot, but I thought I'd add my $.02.
Here is why I ask about the batteries. Other Ford vehicles I have had would start to exhibit a strange symptom when the batteries were getting weak. On the '99 F-150 I had, the gauges would all peg to max, sweep back to minimum, then finally, go to their accurate reading. They did this because the voltage of the electrical system would drop below a minimum threshold when starting the engine and it would essentially "reboot" the PCM in that truck. The gauges were just doing those funky readings as the PCM rebooted.
Is it possible that your transmission shift points are being reset in the PCM for a similar reason? It may be a long shot, but I thought I'd add my $.02.
The batteries are 2 brand new Optima Reds. This is when this problem first showed its ugly head. The truck was running and shifting perfectly based on Dptuner settings. One weekend I decided to put new batteries in because the old ones were getting aged. I disconnected the old ones and installed the new ones. When we text drove immediately after installing these new batts the shift points when back to stock. After some hard runs (15-20 minutes) the Dptuner shifts returned. Truck ran fine until the other day when the stock shifts returned????Maxx