Bad Bucking

[MKZIan]

Howdy, all! So I've been pretty active on this forum lately, and so I considered some questions I need some help with because even I don't know what to do, after the pain I've already gone through taking her to the shop. The bucking of my car has persisted throughout when I first purchased it used with 37k miles. My parents, who surprised me with this car, told me everything was fine. Then I got in the car. Shifting from second to third above 2k RPMs will cause a pretty violent buck. This issue has persisted through an entire transmission and motor replacement.

 

It first started when my battery began fluctuating in power throughout the car. Sometimes it would start the motor, sometimes just the lights in the interior. I then replaced the battery, and it showed it did not help anything. I needed my car diagnosed. My car threw a code simply saying it was the coolant that needed to be replaced, and refilled, and I did. Yet sputtering, and dying still happened. I then took it to the shop. At this point, I knew something was up. They diagnosed it on their systems, and they told me that the motor was misfiring on cylinders 3 and 1. And they also recognized the bucking of the car and replaced the transmission. 

 

Bad news bears, the bucking still to this day, post car doctor and everything, still persists. I've replaced the transmission oil. I have replaced the coolant line. Nothing seems to work. I need y'alls help because I want my car to drive as smooth as she looks. I'm not going to lie, this is the biggest P.O.S I've driven reliability-wise. She's put me on the side of the road a few times. It's 2017. WIth 38k total miles. 

[bbf2530]

2 hours ago, MKZIan said:

Howdy, all! So I've been pretty active on this forum lately, and so I considered some questions I need some help with because even I don't know what to do, after the pain I've already gone through taking her to the shop. The bucking of my car has persisted throughout when I first purchased it used with 37k miles. My parents, who surprised me with this car, told me everything was fine. Then I got in the car. Shifting from second to third above 2k RPMs will cause a pretty violent buck. This issue has persisted through an entire transmission and motor replacement.

 

It first started when my battery began fluctuating in power throughout the car. Sometimes it would start the motor, sometimes just the lights in the interior. I then replaced the battery, and it showed it did not help anything. I needed my car diagnosed. My car threw a code simply saying it was the coolant that needed to be replaced, and refilled, and I did. Yet sputtering, and dying still happened. I then took it to the shop. At this point, I knew something was up. They diagnosed it on their systems, and they told me that the motor was misfiring on cylinders 3 and 1. And they also recognized the bucking of the car and replaced the transmission. 

 

Bad news bears, the bucking still to this day, post car doctor and everything, still persists. I've replaced the transmission oil. I have replaced the coolant line. Nothing seems to work. I need y'alls help because I want my car to drive as smooth as she looks. I'm not going to lie, this is the biggest P.O.S I've driven reliability-wise. She's put me on the side of the road a few times. It's 2017. WIth 38k total miles. 

 

Hi MKZlan. What "shop" are you referring to?  Is it safe to assume the engine and transmission were replaced by Lincoln under warranty?

 

Is your 2017 MKZ still within the 6 year/70,000 mile Lincoln Powertrain Warranty? If yes, your best course of action would be to have the issues properly diagnosed and repaired under warranty.

 

Keep us updated and good luck.

Edited November 9, 2021 by bbf2530

[MKZIan]

19 minutes ago, bbf2530 said:

 

Hi MKZlan. What "shop" are you referring to?  Is it safe to assume the engine and transmission were replaced by Lincoln under warranty?

 

Is your 2017 MKZ still within the 6 year/70,000 mile Lincoln Powertrain Warranty? If yes, your best course of action would be to have the issues properly diagnosed and repaired under warranty.

 

Keep us updated and good luck.

I took it to the same dealership that I bought the car from. It was replaced under warranty and in total it was around $100 final price. It was properly diagnosed and properly fixed. That I would know because it took over friggen two and a half months to replace/fix everything. 

[leftoverture]

16 minutes ago, MKZIan said:

I took it to the same dealership that I bought the car from. It was replaced under warranty and in total it was around $100 final price. It was properly diagnosed and properly fixed. That I would know because it took over friggen two and a half months to replace/fix everything. 

Obviously it was not properly diagnosed otherwise you would not still have the problem. Have you taken it back to the dealer? 

 

Honestly, it sounds more likely a bad sensor or electrical connection. You might want to try a different dealership. 

[bbf2530]

1 hour ago, MKZIan said:

I took it to the same dealership that I bought the car from. It was replaced under warranty and in total it was around $100 final price. It was properly diagnosed and properly fixed. That I would know because it took over friggen two and a half months to replace/fix everything. 

 

Hi MKZIan. You forgot to reply as to whether your 2017 MKZ is still within the 6 year/70,000 mile Powertrain Warranty? Either way...As leftoverture stated, if it was bucking before the repair and is still bucking now, it was not "properly diagnosed and properly fixed".

 

You need to bring the vehicle back to the Dealer (or another Lincoln Dealer, if they will accept it with the previous Dealer repair) and have them fix it properly. 

 

Blind Internet diagnosis on many vehicle issues is difficult at best, and often an exercise in futility. This is one of those situations.

 

Keep us updated and good luck.

[Zondedo]

Sounds like ignition or fuel delivery to me.  Why would they replace the transmission???  Your description makes no sense. Take it back to a qualified dealer before your warranty expires.

Years ago I had a similar issue with my Buick Park Avenue.  The bucking issue only happened when the transmission was locked up in overdrive.  It turned out to be faulty spark plug wires causing a miss.

Edited November 10, 2021 by Zondedo

[MKZIan]

50 minutes ago, Zondedo said:

Sounds like ignition or fuel delivery to me.  Why would they replace the transmission???  Your description makes no sense. Take it back to a qualified dealer before your warranty expires.

Years ago I had a similar issue with my Buick Park Avenue.  The bucking issue only happened when the transmission was locked up in overdrive.  It turned out to be faulty spark plug wires causing a miss.

My description was easy to understand. I told them there was a buck when shifting from second to third gear. They replaced the trans. It was Classic Ford Lincoln of Columbia. They were extremely qualified.

 

They were extremely booked the month my motor blew. Only a few workers worked. It could be a simple fix, it could mean taking it back.

[drolds1]

 

1 hour ago, MKZIan said:

My description was easy to understand. I told them there was a buck when shifting from second to third gear. They replaced the trans. It was Classic Ford Lincoln of Columbia. They were extremely qualified.

 

They were extremely booked the month my motor blew. Only a few workers worked. It could be a simple fix, it could mean taking it back.

IMO, the solution is clear.  Take it back.

[MKZIan]

21 hours ago, drolds1 said:

 

IMO, the solution is clear.  Take it back.

Agreed.