Idle "stumbles" when coasting??? - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat

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Old 11-20-2013, 03:30 AM   #11
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Originally Posted by jwfirebird View Post
try unplugging the egr and checking the tubes for cracks, you will get a code for that but if its not sealing all the time hopefully the symptoms will change and you will know its that
Ya, im leaning more & more to the EGR valve..we just got a fresh 6 inch dump of snow today, so will check that once it gets shovelled The fuel thing~~ doesnt seem like fuel issue, as like said b4 car was ran & moved around every month or 2 while it was "parked", as well the tank was dropped,drained & cleaned & brand new fuel pump installed 2 weeks before it was parked (previous owner got a new car, & this one wasnt needed)Also our first fill once we got it was with supreme gas..havent heard of or seen ethanol free gas here, so we put in the highest ( 94) possible.
One of thos "needle in a haystack" problems, so i guess will do knock down of issues, starting with the simple fix of airlines,pvc & egr..then get into sensors if those ones dont solve it Thx for hints...amazingly this ol girl still getting 36 MPG!!! (hwy) even as old & 300k on her...good ol beast
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