2002 Engine Miss at 3000rpm

[mlnj]

My engine on my 2002 Thunderbird misses at 3000 RPM It seems to run ok below 3000. Anybody have any ideas?

 

[tbird]

Thanks for posting. Include the model year in the subject on future posts, I added it for you.

Have you replaced your ignition coils?
https://forums.fordthunderbirdforum...005-ford-thunderbird-ignition-coils-cop.5040/

 

[John Hayman]

Mine is now missing at all rpms. I have replaced 8 coils and plugs, a MAS, and two oxygen sensors.
What is wrong with this wonderful car?

 

[tbird]

Mine is now missing at all rpms. I have replaced 8 coils and plugs, a MAS, and two oxygen sensors.
What is wrong with this wonderful car?

Check out this old thread and see if anything in there is helpful- https://forums.fordthunderbirdforum.com/threads/misfires-but-no-code.4131/

 

[mlnj]

Further to the problem it appears that it only misses when I rev to 3000 rpm while in neutral. It seems to run fine while driving. Is this normal?

 

[Harry]

Further to the problem it appears that it only misses when I rev to 3000 rpm while in neutral. It seems to run fine while driving. Is this normal?

You may not believe this but that is NORMAL. In order to protect the engine from OVER REVING the engineers added a protection feature. When the car is not moving under load, the PCM module prevents the engine from revolving above 3000 RPM. It does it by shutting down signals to the coils in a revolving fashion. I believe that it also limits the revs while under load to 6000 rpms. again to protect the engine. Hope this explains it. It is not a problem, it is a feature.

 

[mlnj]

Thanks for the answer

 

[Rickwill]

My engine on my 2002 Thunderbird misses at 3000 RPM It seems to run ok below 3000. Anybody have any ideas?