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Old 10-16-2016, 05:46 PM   #1 (permalink)
Exhaust
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Join Date: Mar 2015
Location: Nowhere
Posts: 277
Drives: 2015 AT GM Z
Rep Power: 25
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Default Strange idle upon fueling up 2015z

Hey guys, freaking out here. Every blue moon when I fill up my Z the car shakes upon start up, the tachometer jumps up and then everything is normal. Doesn't seem to happen everytime and the car is normal after the initial shake. it's done this twice before but this time it was a huge jump on the tacho upon idle and jumped up twice. What is causing this? Fuel pump? Choke? Im 100% sure im using the right gas. Seems to happen almost every time I fill up at half a tank
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