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So you are saying the coils are the problem, even though this harsh engagement has been happening even before I had them replaced?

I replaced all 8. I went to Amazon and bought from "ECCP" Pack of 8 Ignition Coils for Ford Thunderbird Lincoln LS Jaguar S-Type Compatible with DG-515 DG509 C1234 2W4Z-12029-BD

My battery is brand new, 2 months old. All coils and spark plugs replaced. No engine light on.

I had my PCM flashed 2 weeks ago by Ford but nothing changed. How do you recalibrate the shift points?

I changed the COP about 2 months ago and the spark plugs last month. There is no engine light on. ? I will be getting diagnosed next Tuesday.

What are "marginal COP(s)"? What would be your suggestion. Have ford diagnose the problem or just get another PCM?

So my 03 Lincoln has the harsh shift at the 1st-2nd gears and also reverses roughly. Ive had the PCM replaced once and the car worked perfect. 2 months later it went back to the same nonsense. I recently noticed that if the 'Service Parking Break' light came on and the car worked properly again...

My mechanic swapped out the throttle body but the same problem happened. I don't believe he changed the throttle position sensor if that could be a solution. I will go to him tomorrow or Monday with the specific steps you suggested. Do you have an email/# where I can send you the short video I...

if I don't restart it, car will move but at a snail pace. No power. I'm not sure about the throttle opening/closing but I know it was cleaned when I had the Maf sensor cleaned and the coils replaced. The only thing that I had changed was the PCM replaced.

ETC comes on immediately when I start the car. The rpm gauge shoots up and then idles down. After I wait about 2 min, I turn the car off and right back on and then it is normal and I drive normally! Codes I'm getting are 2107 2110

My car had a recent PCM flash and all of a sudden the "ECT Engine Failsafe Mode" came on the dashboard display! What do you suggest has happened and what should I do to fix this?

I had all my coils replaced prior to having a PCM flashed and installed. Now the ETC failsafe mode came after the PCM installation. I keep reading #4 is the problem. Should I replace/have that looked at again and maybe solve this issue?

Its all good man. I NEEDED that work done none the less. So resetting the PCM can only be completed with a scan tool or what not?

Got the car back! Runs same for now, however he didn't disconnect the battery terminal! Was nervous it would reset some other stuff! How long do you think the harsh shift will continue or do I need to disconnect the battery???

Awesome explanation! I got all the parts you said! My plugs are 'Motocraft' & and my coil on plug boots are 'Autolite'! I'm sure or atleast I hope they will be fine! Going to take to my mechanic tomorrow in the AM then head to the gas station and add the STP! Hope the PCM can figure out and go...

CAN YOU EXPLAIN: re&re all OEM coils and NGK iridium plugs correctly gapped? change the air breather element? clean the MAF sensor? I'd appreciate it man. Ill do all of this on Monday!

HOW DO I GET THE FIRMWARE UPDATE? I just had my tranny fixed and PCM replaced(actual issue). 2 months later it is doing the harsh shifts again out of nowhere. It idles rough in the morning. Could that be an issue with the exhaust?

I was researching about harsh shifts that occurs with the lincoln ls while accelerating. Some people said they did the disconnecting of the battery terminal, or turning the key to ACC and pressing the acceleration pedal to the floor for 5 seconds. Thanks

What did you do? The key procedure?

did you do negative or positive?