Prius (Gen 2) :: Engine Tends To Shudder A Whole Lot When Starting


Feb 3, 2016

My engine tends to shudder a whole lot when starting (sometimes) I also hear an audible clunk or Thunk sometimes when the normal engine simply starts as well as when accelerating, Decelerating, braking, and accelerating on reverse. I know you may think, axles, but I recently replaced them twice because the first pair made my ABS turn on so I'm returning those (bad brand called "EMPI"), and these second ones seem to be working great (aftermarket SurTrak, the dealer has the original ones for about $600 each WAY too expensive) but I started noticing the clunk after 2 days.

Notice: it is one single clunk not a clack clack clack when turning, no. It is only heard when accelerating, decelerating, braking, and accelerating on reverse; one single clunk. I've been searching a lot and narrowed down the possibilities to motor/Trans. Mounts. Notice: I've recently changed struts, springs, stabilizer bar, wheel bearings hubs, as well as the front axle shafts.

I have a 2004 with 175,200 miles on it by the way!

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I just picked up my new GTI and drove it 300 miles home. I did notice one potential issue that will need service attention. There is a mild but very noticeable shudder when slowing to a stop (gently slowing to less than 5mph). It is also mildly noticeable when taking off slowly but much less so.

The best description I can come up with is : Shudder that occurs when you slow to a near stop in a manual transmission car without pressing in the clutch? That little shudder that reminds you to put the clutch in before you stall. That is what this feels like. It doesn't shake the whole car but it is very noticeable.

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I am not the original owner of this 1990 E250 cargo van with a 302 in it. I am trying to troubleshoot this shudder I am having. It only happens when I am just starting off from a stop. Every other place the tranny runs and shifts great. I trying to find a starting point and after reading a bunch in a bunch of different places, I am confused as to the tranny I have or even had.

It has in big bold letters METRIC on the bottom of the pan. It also has Automatic Overdrive and Ford on the bottom of the pan also. It is a 14 bolt pan with the two rear corners of the pan chamfered off. I see now it is DEFINITELY the AOD installed and NOT the AODE. The thing is my steering column is labeled 1 D and OD. That is a 3 spd overdrive to me. What the heck is going on? How can I tell what the tranny was that came out of the van?

When I look under the van at the shift linkage, you can definitely tell the linkage is colored red which to me looks like somebody has been down there playing around. Is it possible to put a AOD into this van with the steering column the way it is? Could this be a reason for my early shudder at starting off from a stop? Once I put my foot in it or get moving at a quicker pace, the shudder goes away. Something is not right with the way this tranny is set up. I am not even sure where to start.

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I have a 2010 GTI with 70K miles. At @ 40K the clutch began to exhibit sort of a slight sudder, and squeak when the car was fully warmed up, but only from starting from a stop on a steep uphill incline. The dealer could not duplicate the problem when routine maintainence was performed, At the 70K maintainence, they could duplicate the problem, and have told me that a new clutch from flywheel on is needed. The Diagnosis was $90 and could not have included any mechanical inspection. One of the Techs told me that there is a list of VIN's that VW apparently identified as having potential clutch issues. My thoughts are:

Even though the car is past the 60K powertrain warranty, the problem was brought to the dealers attention at @40K.

If the car is on the list, VW already knew there could be issues.

I feel that under the circumstances VW could be expected to cover 1/2 of the repair, since the car now has 70K.

Other questions if VW has no interest in working with me:

Can the flywheel be resurfaced? What would the approximate cost for labor to replace the clutch by an Independent garage? The car operates as usual, just with the one issue. I would like to have repair done fairly soon.

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This occurred on a recent trip a few times and I pulled the following codes (in order):

P0356 (once) : Ignition Coil F (6) Primary/Secondary Circuit Malfunction
P0302 (recurring): misfire on cylinder 2

I have since purchased and replaced the coil on #2. This did not resolve the problem. I have replaced coil on #6 in the last year...

Because I saw a suggestion somewhere on the net around this problem while searching, that this could be related to OD, I tried disabling OD and enabled OD on an incline today to test after replacing COP on #2 and it seemed to resolve the issue to turn OD off. Not sure if related...?

Other observation: Cab of truck often smells of gas just after starting the truck. Mentioned this to the shop, but they didn't find anything obvious.

Short history of codes and work that has been done:

Sometime in early 2011: Ford service dept did this work.
First failure was coil bad on #7. Tech swapped 7 & 8 to verify the problem followed the coil. Then when the problem DID follow the coil, he replaced #8 with new.

05/2011 MacKenzie Ford changed all plugs

12/2011 - swapped out COP on #7.

02/2012 - P0306 - Now, COP #6 is reported as bad.

November/December 2012
P2104 P Throttle Actuator Control (TAC) - Forced Idle
P2112 P TAC Stuck Close
P2111 TAC Stuck Open

I did throttle body clean - removed it and used TB cleaner. replaced...

Late December 2012 - while driving on freeway at speeds 50+, but easily reproduced around 60 after starting up a slight incline. symptom is heavy shudder/shake. Possibly resolved by turning OD off.
P0356 (once) : Ignition Coil F (6) Primary/Secondary Circuit Malfunction
P0302 (recurring) : Misfire on cylinder 2

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