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Discussion Starter #1
My 2008 SX4 has 140k miles on it and about two ago I had the TCM updated and the transmission changed at Suzuki. The reason I had the TCM updated was when I drive 20 minutes in town (stop and go) and the engine has warmed up the engine will hesitate when I slow down to a stop and then when I go from a stop the engine again will hesitate (maybe hesitate is the wrong term but that is the only way I can describe it). This problem haves at coming to a stop and moving from a stop. It wont do it at a stop only when the car is moving. Does this have anything to do with the shift solenoid?
 

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ENgine hesitates and they update the Transmission COntrol MOdule.....?....and a transmission change ? OK, TCM may have some relation with engine as it releases electronic throttle a little during acceleration while shifting to save transmission clutches and disks...but other than that....I have problem seeing a connection. ANd no more about a shift solenoid....
Maybe you could make a video of that phenomena to make sure we make a correct interpretation.
Many have complained about throttle lag, but that does not seem to correspond to what you describe...
DId the phenomena exist before the transmission was changed ?
 

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My 2008 SX4 has 140k miles on it and about two ago I had the TCM updated and the transmission changed at Suzuki. The reason I had the TCM updated was when I drive 20 minutes in town (stop and go) and the engine has warmed up the engine will hesitate when I slow down to a stop and then when I go from a stop the engine again will hesitate (maybe hesitate is the wrong term but that is the only way I can describe it). This problem haves at coming to a stop and moving from a stop. It wont do it at a stop only when the car is moving. Does this have anything to do with the shift solenoid?
Had a Pontiac that did something like that, turned out the trans was not unlocking the torque converter. Also may be the throttle position sensor, was dropping timing coming off idle and off throttle.
 

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Had a Pontiac that did something like that, turned out the trans was not unlocking the torque converter...
Hey I remember that from the Transport forum....
 

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Discussion Starter #6
"Hesitates" is probably not the correct term, but it is the only word that comes to mind. Once I film the issue it might better explain what is happening. I hope to film sometime this week and upload an example.
 

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Discussion Starter #7 (Edited)
I was able to capture video and audio of the sound coming from the engine. This is after 20 to 25 minutes of the engine running. At first start all is good, but as the time goes on the problem shows up when moving from a compete stop. And when coming to a stop the engine makes that same sound so most of the time I pump the gas peddle and it makes the problem stop until I once again move from a stop to go. I hope this video helps me with diagnosing the problem.

https://youtu.be/U1Vu7OfgKD4
 

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That, I believe is the sound that says stop driving me untill you have me diagnosed and repaired.

Is this on your SX4? More information on your ride is needed.
It sounds as if a component in a rotational system is fractured and will be coming apart.
You DO NOT want to be traveling at speed when that happens.
If automatic trans, it could be the flex plate.
If a manual trans, it could be a clutch or pressure plate issue.
All of which could have catastrophic consequences.

Or. it could simply be a loose piece of sheet metal rubbing on a rotational device.
Is anything loose and rattling under the hood when just idling?

Have it checked before someone gets hurt!

Don
 

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Discussion Starter #9
I will tell my regular mechanic about the rotational system fractured, flex plate, clutch or the pressure plate issue. It is my 2008 SX4 and it has 140k miles on it and about two months ago I took it to my regular mechanic and he sent me to his a transmission (who turns out to be my daughter's Sunday School teacher) and he suggested that I have the TCM updated. After taking it to get updated I returned to the place that did the update right after I drove for 30 minutes because the update didn't fix the problem. While there I demonstrated the issue to the mechanic that works on the Suzuki's and he thought it could be a shift solenoid. So I was wondering if this could be related to the shift solenoid... Also the check engine light is not on.
 

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OK, so an automatic transmission.
That rules out the clutch/pressure plate and leaves the flexplate as a possible cause.

Your regular mechanic sending you to see the transmission specialist seems to exclude anything being
loose in the engine compartment and points it to being non-engine related.

If a shift solenoid was going out, it most likely would not bring a light, nor would a
cracked flexplate or loose torque converter.
It seems as if when you are giving it gas and the noise goes away, it is the
centripetal force acting to straighten the plate, which quiets the sound.

I do not perceive it to be related to the shifting or nonshifting between the gears, but this is only my opinion.

Your mechanic could possibly remove an inspection plate and look inside to check whether or not that is your problem.

Don
 

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Discussion Starter #11
Thank you for your input. I will pass that along to both mechanics and see what they can do. Fortunately for me both mechanics are straight-up guys and I have never felt like they have given me anything but great service.

Thank you and have a good weekend.
 

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When you start a new thread for the same issue, you have to repeat all info that was given in the original thread...it would be better to keep updating the original thread. Better yet, fill up your profile or your signature so the info (model, transmisison, AWD...etc, mileage) is carried on with every post you add and any new thread you start.
What puzzles me about your noise is that it happens only once the engine has warmed up..... but anyway, I agree with what was suggested ...really not desirable on the highway....you say you can hear it with the car stopped and just revving the engine clears it...
What was not said though is the balancer/pulley at the front of the engine, a component that has been known to fracture with other cars, though not really documented with the SX4, but it seems torque sets the problem, and revving without torque clears it....I also stick with the flex plate or torque converter ....
...It seems as if when you are giving it gas and the noise goes away, it is the centripetal force acting to straighten the plate, which quiets the sound...
maybe torque converter unbolted from the flywheel and scraping the bellhousing......
I'd like to know it you can feel the torque converter clutch apply...at least in the minutes before the noise sets in...
 

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Discussion Starter #13
Update 1. I had the transmission shop replaced the torque converter clutch(?) solenoid on Thursday and I will drive my car around this weekend and let you all know how things go.
 

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Discussion Starter #14
Update 2. So far that appears to have fixed my problem. I drove my SX-4 around town the entire weekend and I never had the issue occur. I saw the man who fixed my car this weekend and thanked him for fixing my car.
Thanks for the input!
JDL
 
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