stepper motor

[ShadeTree93']

In researching surging issues, I found that the stepper motor could be at fault so I removed it to clean it but was wondering if the cone shaped plunger could / should be able to be moved by hand back and forth. Mine is completely immovable.

Thanks

 

[Slam]

No I don't think it should be moveable. You can pick up stepper motors for CHEAP if you search around the internet. I picked one up for $25 at Kragen so it was worth it to replace it IMO

 

[Disco Mike]

The plunger will move by means of the ECU.
Have you cleaned all the carbon from the plunger as well as the hole it goes into, how about the t/body, have you cleaned it recently?