Originally Posted by felixthecat
It could very well be the egr valve, unplug it(driver side) & see if that makes a difference...
That is not good advice based on my experience. I unplugged my EGR electrical connector and it helped my engine symptoms, and this was very misleading
and helpful too.
Felix, do you remember that 2015 thread about Duratec EGR testing?
DO NOT read this 2015 EGR thread because it is long and is mostly off topic to the OP thread:
Originally Posted by 2pointWOAH
....When cruising, like 45/60, I notice a small weird surge. The feeling is like a small bobbing forward and backward...
Yep, I had THAT problem/that symptom. I have a great story for you, but mostly only if your car is a PZEV car. Is your car a PZEV? -Does your car engine have red colored fuel injectors?
The red colored 12-hole fuel injectors get clogged and give that symptom/s. My engine problems were fixed after replacing my injectors with re-man'ed units. No more engine surge (bucking) at that speed range for me.
I will reply again, after you reply, if needed.