I recently started getting a sputter mostly at low speed. It comes and goes. I just replaced spark plugs with no luck.

 

It sounds like a EGR problem. Have you ever done a EGR cleaning on your vehicle? Check also for spark plugs wires arc'ing

 

Never did an erg cleaning. Car has 180000 on it, is it hard to do a cleaning? Also has coils for each plug? Could it be a bad coil

 

Also check engine light is not on. Shouldn't it come on with a code if it were egr related

 

You may want to get the codes checked anyway. Most parts stores do this as a free service.

As for the sputter, does it happen when accelerating, decelerating, or coasting? Any work done on the car not long before the problem started happening?

 

I put in new plugs , because I had been getting skip. Happens mostly when I am just about moving along 35 mpg. But not all the time. I looked at engine and looks pretty easy to get to erg ports. Will try cleaning on weekend. I wonder if one of the coils is bad. Each plug has its own

 

Definitely check for codes. You may have a temporary code, where you have some misfires, but not enough to trigger a check engine light. It is worth a shot.

 

Checked and are no codes

 

If it is an automatic... Start car, press and hold the brake, put in drive and then slowly press the gas pedal thus slowly raising the rpm's and try and find a sweet spot between idle speed and 3,000 rpm where the engine stumbles. If you find it hold the rpm's at that speed for a while and see if you can force an engine code.