Power loss/poor throttle res. in 2006 5.4L

[stamp11127]

The solenoids don't make logical decisions. They are basically an output device - depending on the generation the pcm or tcm controls when the trans shifts.

You may want to look over the trans harness and clean the connections, especially the grounds.

 

[Gruz7]

The solenoids don't make logical decisions. They are basically an output device - depending on the generation the pcm or tcm controls when the trans shifts.

You may want to look over the trans harness and clean the connections, especially the grounds.

The trans harness? So you're telling me there's connection on the exterior of the granny that can get dirty and mess with shifting/accelerator functions? Yikes this is getting better and better lol


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[stamp11127]

Of course they do...

 

[Gruz7]

Ohhh! Ok... So spraying connections with some MAF sensor cleaner or something good or should I just clean them with air and dry tools? If that fixes my issues then you are some kind of hero


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[Habbibie]

Yea but which solenoid? You have 4 of them if I'm not mistaken and all of them failing at once is very rare

 

[Gruz7]

Yea but which solenoid? You have 4 of them if I'm not mistaken and all of them failing at once is very rare

Figured I'd able to test them individually but the more and more I read about what happens with bad solenoids in tranny the more it seems like it's not what's wrong with my truck.. If it came to it, I wouldn't have an issue just replacing all of them... I'll be cleaning connectors etc tomorrow and running a few more tests but I'm halfway inclined to pay the dealer and see if they can diagnose it.... As I don't even have any codes pending..


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[stamp11127]

In re-reading your thread it seems like your shifting issues started after cleaning the underside of the truck? Is that correct?

 

[Gruz7]

In re-reading your thread it seems like your shifting issues started after cleaning the underside of the truck? Is that correct?

No they happened after I was towing a 400-600lb trailer through a dusty road for about a mile or 2... Then after taking the highway home when I got on a backroad to drop off trailer it had the shifting problems and lagging/bogging and after cleaning the underbody it was the same as before... I just had it hit with light water to get rid of the dust no soap really.



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[Gruz7]

Ok have an idea... Might be a waste but since I can't find anything or throw any codes I think it's worth a shot... Going to replace the transmission speed sensor first but think I'll end up doing more of the sensors if that doesn't fix it... Before they're replaced I have a FREE reflash coming at the dealer this week so I can rule that out too.
My question now is, where are ALL the speed sensors located on an 06 XLT 5.4?
I know where the tranny sensor is and that's prolly all I'll need to try to change but would be nice to know how many and where they all are...
Thanks again guys


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[Gruz7]

Well I took the gamble and got the output shaft speed sensor for the tranny this morning... Should be here Friday HOPING more than anything that this works and I can drive it again. Here's a pic of the part I'm replacing.

The second pic shows the new motorcraft replacement with the P# thanks..


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[Gruz7]

Ok... I replaced the output shaft speed sensor that's located on the top of the tranny... Absolutely no change in performance/operation of the truck

I will be taking it to the dealer tomorrow morning as I am doing work on the cameras at the ford dealership (lol) and they will be reflashing the computer on my 06 and then if it's not fixed they're gonna diagnose it for me because I have no codes and also no clue to what the issue is... Still hoping it's not anything major but I doesn't seem like I'd be that lucky at this point


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[Habbibie]

You know a speed sensor does trigger a CEL and you say u have none... So it's not a sensor issue. I'm telling you man something went haywire with your ECU get it read and see what it's trying to tell you

 

[Gruz7]

You know a speed sensor does trigger a CEL and you say u have none... So it's not a sensor issue. I'm telling you man something went haywire with your ECU get it read and see what it's trying to tell you

Think you're right... My problem is I don't have anything pending or any codes at all so tomorrow I'm just gonna have to dealer diagnose it for me so I at least know what I need to fix


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[Gruz7]

Well I got some codes finally...
C1288 and C1440 and those are the only codes it gave me, says transducer failure which is the sensor on the brake booster... I have a new one I just picked up and haven't put it on yet... Tranny making all kinds of trouble now song with its shuddering and bogging and early shifting it has now almost completely decided to not go into reverse anymore...
When I pull the selector into R it just revs up the RPMs and doesn't go anywhere probably 9/10 times and when it does move it jerks and then everything shaking and rattles and it feels like the whole entire truck is about to fall apart but then fine again when I am driving on the road at highway speeds and I can shift through all the other gears with only my minor issues...

If this little transducer fixes that trans issue then I believe that pigs can fly......

Edit: let me add the the output speed sensor gave me no change at all AND when I select reverse it does not make the clunk like the tranny is going into reverse..

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[Maloburro]

Did you have Ford reflash and read it? Mine has the same issue. It shifts too quick then bogs. I also get the torque converter shudder. It's when driving in neighborhoods at 25mph but also seems reluctant to downshift at times on the highway. I haven't had the issue with reverse though. It got better when I changed the tranny filter but it's still there.

I'm very interested to hear what Ford says.

 

[Gruz7]

Did you have Ford reflash and read it? Mine has the same issue. It shifts too quick then bogs. I also get the torque converter shudder. It's when driving in neighborhoods at 25mph but also seems reluctant to downshift at times on the highway. I haven't had the issue with reverse though. It got better when I changed the tranny filter but it's still there.

I'm very interested to hear what Ford says.

Me as well... But no I was not able to et the reflash done yet because my guy at the dealer was not there and I'm not gonna pay for it if I can just do it through him... This week I'll go for the reflash and diagnosis and let this thread know what they tell me.... No longer having reverse is making this it must be something in the tranny... So therefore I've already got a tranny shop lined up to take a look at it when it's done at the dealer and when I'm done with the transducer (15 min job lol)


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[Maloburro]

Hey Gruz any updates? I'm very interested to hear since mine seems to have similar issues.

 

[Gruz7]

Hey Gruz any updates? I'm very interested to hear since mine seems to have similar issues.

Nothing yet .... Went to change the transducer and the master cylinder cracked and broke... New master cylinder goes on today hopefully and then well see if that transducer was really causing the problem (doubtful) then it's going to go to a transmission shop over here for diagnosis and possible repair because I am losing my mind trying to find out what's causing this


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[Habbibie]

Did you ever get the PCM read?

You're doing the classic "throwing money for nothing" situation.

Get the PCM read, by the sound of it your PCM took a dive not your transmission.

Take it to the dealer, fuss up and pay thee $125 charge and it might just save you the $2000+ you'll drop on a new trans.

 

[Gruz7]

Did you ever get the PCM read?

You're doing the classic "throwing money for nothing" situation.

Get the PCM read, by the sound of it your PCM took a dive not your transmission.

Take it to the dealer, fuss up and pay thee $125 charge and it might just save you the $2000+ you'll drop on a new trans.

PCM read? Like go in the system and check for codes and scan everything?


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