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06 Hemi Stutter 30-40 MPH

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11K views 37 replies 8 participants last post by  Chooch 
#1 ·
Hello all, I have an 06 WK Hemi, when driving under normal load between 30-40 MPH the whole vehicle shakes just a little bit. The tach doesn't move and it hasn't thrown any codes. I took it to a shop, they think one of the coils is misfiring. But cant tell which one or two. Please help, I want to start adding mods but until this isn't rectified, nothing happens. Has new plugs and TB.
Thanks in advance
 
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#2 ·
Hello all, I have an 06 WK Hemi, when driving under normal load between 30-40 MPH the whole vehicle shakes just a little bit. The tach doesn't move and it hasn't thrown any codes. I took it to a shop, they think one of the coils is misfiring. But cant tell which one or two. Please help, I want to start adding mods but until this isn't rectified, nothing happens. Has new plugs and TB.
Thanks in advance

did the issue start with the new plugs? the hemi's are kinda picky about what plugs are used.
 
#4 ·
It could be a lot of things but wires, packs, plugs, PCM, pushrod, vacuum leak, or electronic throttle control. Kinda hard to tell without any other indications...


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#10 ·
I have the exact same issue in the same speed interval-- usually happens at around 36 mph. If I give it some more throttle it smoothly right out and accelerates. I notice that it seems to happen on a slight incline in the road at steady throttle. I also changed: the plugs, checked the coil packs, egr value, completely cleaned the TB, reset the TB, sea-foamed the intake manifold, put fuel injector cleaner- multiple times- all to NO avail. Problem still exists. No codes at all! I now have no clue and it really bothers me. Any ideas would be appreciated. Thanks.
 
#15 ·
Looks like the problem is back, seemed to be good last night after I did the seafoam, but on my into work this morning, back to the same. Just not as frequently so I am thinkin a second dose. Amnesia, did you have a shop check it out, maybe a dealership? I took mine to the shop, they reproduced the problem but no fault codes. They suspected 1 or 2 coil packs were going bad, but I don't want to repolace all for nothing.
 
#16 ·
I bought a new coil pack because one looked really bad- boot swollen due to oil and heat?? Still did not solve the problem. I have switched out several of the original coil packs with the new pack in an attempted to see if I could identify a coil problem but to no avail. Dealership absolutely no help. I have given up on them due to other unresolved issues related to parking brake.

Do you think it could be a transmission issue ? I am just guessing out of frustration.

I also used Seafoam in the manifold and fuel tank. Helped to quite a tic in the valve train but no impact on the stutter issue.
 
#18 · (Edited)
Can you describe the stutter a little more, other than it just shakes a little at those speeds? I have a few questions, if you don't mind:
1. What gear(s) is it in when this occurs?
2. What happens if you slightly "goose" the throttle when this is happening?
3. Have you checked the transmission fluid level with hot?
4. How many miles on the vehicle?
5. When was the transmission last serviced?
6. Spark plugs are from the stealer, but are they platinum or iridium, or the Champion 570's? Did you check the gaps before installing?
7. When this occurs, does the engine appear to be lugging, like maybe it needs to downshift? Between ~35-41 mph you'll probably be in 4th (first overdrive) gear.
 
#19 ·
The stutter is very slight, feel it in whole vehicle, seat of pants. Its more of an irritant than anything, my concern is if I don't get this figured out its gonna become bigger.

1. top of 3 bottom of 4
2. Give it a little throttle and it goes back to normal
3. Trans fluid level good, serviced last September.
4. 89000k
5. Spark plugs, copper from dealership, gaps verified.
6. Doesn't seem to lack power at all.
 
#20 ·
That would be irritating. You're almost exactly where I am on mileage with my 06. Since you're at real light throttle, I guess it is possible that the converter clutch is on the edge of applying, or trying to apply. If you're not getting any shift in RPM though, that tells me it is not, at least not fully. Is MDS active at any time when this is going on? Have you tried running it with the shift lever in "4" position? This would eliminate the MDS from the equation. You may also want to try running in the "3" position (not allowing it to upshift to 4th) at light throttle to see if it does it at the speeds it normally happens at. I guess what I am after is to either eliminate the transmission and/or MDS or see if either, in any way, is contributing to the issue. This might be a fun one to try and figure out.

Have you done any mods yet? If so, which ones? Stock exhaust?
 
#25 · (Edited)
Yes it sounds structural to me rather than mechanical/engine related because it is happening at a certain speed only rather than a specific rpm. Doesn't hurt to do a wheel balance and alignment check as well. Check all the suspension bushings, cv axles etc.


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