low RPM stumble

rjmorel · 08-05-2019, 08:24 PM

NZ, I took out the stepper and the tip was pretty dirty as well as the cavity it sits in. cleaned out with Q tip and rag on the stepper tip. Put back together, reset ECU and it doesn't stumble anymore. Runs smooth from idle on up. Thanks so much for your tutelage.
Now can you explain when the stepper gets dirty, in my case 17,400 miles worth, it acts like it does? Is the tip some sort of sensor that when dirty doesn't sense like it should?
Is that exhaust grunge I cleaned out of stepper hole or just dirt from some wheres else, thanks, rj?

08-05-2019, 08:24 PM	#18
rjmorel Join Date: May 2007 Location: Warshington Posts: 928	NZ, I took out the stepper and the tip was pretty dirty as well as the cavity it sits in. cleaned out with Q tip and rag on the stepper tip. Put back together, reset ECU and it doesn't stumble anymore. Runs smooth from idle on up. Thanks so much for your tutelage. Now can you explain when the stepper gets dirty, in my case 17,400 miles worth, it acts like it does? Is the tip some sort of sensor that when dirty doesn't sense like it should? Is that exhaust grunge I cleaned out of stepper hole or just dirt from some wheres else, thanks, rj? __________________ Live Zong, and Prosper
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