Shutter under hard accelleration

[SHOinVa]

I wonder if I had searched "shudder" instead of "shutter" I would have found more threads about this issue.

OK - I need the car up and running for a few days and since it only happens on really hard acceleration I'm going to wait to start messing around with the tunes. First I'll double check the ATF fluid, do a data run, ask BCB nicely if they will look at my numbers and see if I need to update the tune and then restore it back to stock. It could be the PTU but I feel like that would do it off the line not at the shift point, but then you never really know when it comes to machines. Thanks to everyone for pointing me in the right direction.
C/

 

[Johnsho2016]

Hi all,

I have a 2010 SHO that I've had since approx 2012, and it currently has 127,000 miles on it. I have been replacing quite a few things on it. Spark plugs, fuel injectors, front struts, control arms, and all four CV axels. This was all done over the course of a month or two.

My problem stems from after most of this stuff was replaced the car would shutter, under hard acceleration. Thought at first it might be engine missing, but it was determined it is not. You can feel it in the steering wheel so I'm inclined to think it's in the front end. If you "roll into" the throttle it usually will NOT shudder, but if you stab the throttle (at any speed really) it does it.

The rear CV axels I replaced with FoMoCo axels. The fronts were Cardone. I had read where it could be the motor mounts, so I replaced both motor mount and transmission mount, as well as the 2 torsional mounts. This did not fix the problem. It has new tires and also replaced the rotors/brake pads this past weekend.

I'm out of things to look at/replace. I know there is an intermediate shaft in there that I did not replace. AND I have considered replacing the Cardone front CV axels with FoMoCo if I go for the intermediate shaft.

Anyone have any thoughts on what could be causing this? If you drive the car like a grandma you'd never notice it.

Any help is appreciated.

I had something simmiler and turned out it was in the front rack. two bad tie rods and under hard accelerating the loose parts caused a problem. I don't know I would call it a shuttering and it was not the engine.

 

[kryptto]

Check the mounts as well - engine mount under battery tray - the transmission mounts as well.

 

[SHOinVa]

Small Update
Having a few cool cars is a lot of fun until they all start giving you problems at once, basically I'm in a holding pattern with the SHO because I need something to drive for a trip next week and it runs great as long as I don't force a hard shift between 1-2-3, so I have not done much trouble shooting. I was going to do a data log but I found out last week the place I got the tune from Brew City Boost closed up shop last year so I'm not sure who to ask to look at the numbers.
The symptoms are a bit strange, as I said as long as I stay out of the gas there's no issues, when I first start out there are real issues, it only appears after you have driven for awhile. I feel like it has something to do with pressure because it feels like it just doesn't want to shift under heavy acceleration and bonces off the rev limiter. After it bounces off a few times it feels like it needs less pressure to shift and finally does. After my trip nest week I guess I'll go back to stock tune and see where I'm at. There really is no one around here other then Ford that knows anything about these cars so depending on what it does after I pull the tune I imagine I'll have to let them have a look and go from there. As always you guys are great for your help, ideas, and guidance.
r/
Charlie

 

[BradM]

Small Update
Having a few cool cars is a lot of fun until they all start giving you problems at once, basically I'm in a holding pattern with the SHO because I need something to drive for a trip next week and it runs great as long as I don't force a hard shift between 1-2-3, so I have not done much trouble shooting. I was going to do a data log but I found out last week the place I got the tune from Brew City Boost closed up shop last year so I'm not sure who to ask to look at the numbers.
The symptoms are a bit strange, as I said as long as I stay out of the gas there's no issues, when I first start out there are real issues, it only appears after you have driven for awhile. I feel like it has something to do with pressure because it feels like it just doesn't want to shift under heavy acceleration and bonces off the rev limiter. After it bounces off a few times it feels like it needs less pressure to shift and finally does. After my trip nest week I guess I'll go back to stock tune and see where I'm at. There really is no one around here other then Ford that knows anything about these cars so depending on what it does after I pull the tune I imagine I'll have to let them have a look and go from there. As always you guys are great for your help, ideas, and guidance.
r/
Charlie

Have you checked the driveshaft? Research shows these can cause shuddering. They have three points of failure (CV joint, U-joint, and carrier bearing). Worth checking IMHO.

 

[SHOinVa]

Hey Everyone,
- Just a heads up I'm going to move this conversation to another thread or start a new one because after spending time with the car its clear there a lot more going on then just a shudder. It's something the transmission and hopefully its just a sensor, module, or something like that. As I said earlier, what I thought was a shudder was it getting stuck in 1-2-3 gears and bouncing off the rev limiter. Other times it shifts harder then it should, I actually got the front tires to chirp one day. Then today at highway speed I went to pass a car, when it went to down shift it slipped enough for the engine to rev up before it went into the lower gear. Again as long as you drive it very conservatively it seems fine but I'm not sure how long that will last. I'm going to look around on some of the other threads and see if anyone has had a similar problem. Thanks for all your suggestions and help.

Charlie

 

[SHOdded]

Hey Everyone,
- Just a heads up I'm going to move this conversation to another thread or start a new one because after spending time with the car its clear there a lot more going on then just a shudder. It's something the transmission and hopefully its just a sensor, module, or something like that. As I said earlier, what I thought was a shudder was it getting stuck in 1-2-3 gears and bouncing off the rev limiter. Other times it shifts harder then it should, I actually got the front tires to chirp one day. Then today at highway speed I went to pass a car, when it went to down shift it slipped enough for the engine to rev up before it went into the lower gear. Again as long as you drive it very conservatively it seems fine but I'm not sure how long that will last. I'm going to look around on some of the other threads and see if anyone has had a similar problem. Thanks for all your suggestions and help.

Charlie

@SHOinVa there is a known problem with a clutch/clutch snap ring that causes this kind of erratic behavior. there was an SSM from ford about it. hopefully not that but sure sounds like it.

arggggg Dredded P0756

How long should it take? Hoping to get it back soon. Using an escape as loner for now. Wife liked it so I got her a leased one for Christmas Sent from my SM-T560NU using Tapatalk

shoforum.com

 

[SHOdded]

the cheaper possibility is tss/oss and ranger sensors.

 

[SHOinVa]

@SHOinVa there is a known problem with a clutch/clutch snap ring that causes this kind of erratic behavior. there was an SSM from ford about it. hopefully not that but sure sounds like it.

arggggg Dredded P0756

How long should it take? Hoping to get it back soon. Using an escape as loner for now. Wife liked it so I got her a leased one for Christmas Sent from my SM-T560NU using Tapatalk

shoforum.com

the cheaper possibility is tss/oss and ranger sensors.

Either way it's well beyond anything, I or the shop I use for basic maintenance can fix, so it looks like as much as I hate to do it, a trip to the local Ford dealership is in order. Last week was a busy week, but I'll remove the tune and drive it around some in the next few days and drop it off next Monday. I'm expecting the worse it just feel like one of those things that will turn into a nightmare but hopefully I'm wrong. I'll keep you posted, there really is no need to move the thread since there is nothing I can do.
C/

 

[SHOinVa]

Update
I removed the tune and drove it some, just when I thought that might be the problem it had a pretty significant event. Strangely it never seems to do the same thing twice other then it only seems to happen when I'm on her hard, this time it just stopped like I hit the brakes, then it had trouble getting started again. Somehow it started working again and I got home safety. I did check for a code and its given me a P0605 which is not very specific other then it seems real bad. Anyone ever dealt with P0605.
C/

 

[luigisho]

P0605 - Internal Control Module Read Only Memory (ROM) Error

Learn about P0605 symptoms, causes, and potential solutions from the diagnostic experts at RepairPal.

repairpal.com

I would try a hard reset with power disconnected.. but this might be a power/voltage issue, or the computer code, or the ROM functionality itself is compromised. SO apart from receiving proper voltage maybe a reflash is in order or a replacement?? Best guess without ever actually dealing with this code.

 

[SHOinVa]

P0605 - Internal Control Module Read Only Memory (ROM) Error

Learn about P0605 symptoms, causes, and potential solutions from the diagnostic experts at RepairPal.

repairpal.com

I would try a hard reset with power disconnected.. but this might be a power/voltage issue, or the computer code, or the ROM functionality itself is compromised. SO apart from receiving proper voltage maybe a reflash is in order or a replacement?? Best guess without ever actually dealing with this code.

Funny you should say that, something strange happened when I tried to flash the computer back to the stock tune. It kept failing and I ended up getting a 'Low Voltage or Battery" prompt. I had to hook up the battery charger to get it to accept the stock tune. I have a really good battery and the car as been driven a fair amount so there should have been no reason for the fault. I think your on to something with the voltage issue idea, if you think about it, the fact it only happens when the car needs the most voltage (warmed up / running hard). Either way it's beyond me so she's headed to Ford, which may not be that much better but I'm giving them the first swing at fixing it.
C/

 

[luigisho]

Honestly that is not a bad plan. Some issues are getting complicated without multi thousand dollar scanning equipment to track it down.

 

[kryptto]

This just happen to drop today and well Shutter thread thought it could be very helpful: