Power loss/poor throttle res. in 2006 5.4L

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stamp11127

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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.
 
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Gruz7

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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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Gruz7

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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

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Yea but which solenoid? You have 4 of them if I'm not mistaken and all of them failing at once is very rare
 
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Gruz7

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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

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In re-reading your thread it seems like your shifting issues started after cleaning the underside of the truck? Is that correct?
 
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Gruz7

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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

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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

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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.
e9c82eaefde0ef3a3f68eba338492237.jpg
c736f134cd6cf9ac7456a7b7eee3ccb7.png

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


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