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Old 11-01-2019, 04:18 PM   #3
Easyy
Scooby Newbie
 
Member#: 507940
Join Date: Nov 2019
Chapter/Region: MWSOC
Location: WI
Vehicle:
2002 wrx
white

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Quote:
Originally Posted by snow_bound26 View Post
Did you reset the computer after installing the new MAF? Do you mean Prosport? Not passport. Might need to recalibrate the O2 sensor for it or replace it if it's old.

As for the misfire. Have you checked your plugs and coils? Not that all 4 typically go at once. Crank position sensor can cause misfire codes. And lightened flywheels are notorious for it. Especially if they are combined with a light crank pulley.
No, I didn't know resetting it was a thing lol. I usually drive an obd1 car so im used to dumb ecus lol. I will go try this now. And yeah, could be prosport, I'm just trying to recall it off the top of my head.

And the misfire, I'm pretty sure that its caused by the lean idle, its very lopey and rough at idle but instantly smooths out once driving.
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