Just recently when I went to the gas pump after filling up my car struggles to start up sometimes takes 2 times anyone got any idea what it might be also my gas gauge recently stopped working too

 

that would be either ur evap purge solenoid on the intake manifold or the evap vent solenoid on the tank itself. they malfunction sometimes and stay stuck open allowing gas fumes from your tank to enter the manifold making it hard to start initially. happened twice to me already in a year (i believe its from the meth), anyways dealership fixed it for free even with all my mods.

dont worry much about as its only right once you start the car and for about 20 seconds the afrs bounce all over the place. dont know about your tank level indicator tho...

 

i have noticed that the sensors on the fuel tanks of gms arnt great my cobalt hasnt had a problem but i have been through 2 on my trail blazer

 

gms also have a huge problem with evap solenoids haha looks like u got the full brunt of it. could be a lot worse like differentials or main seals like some other manufacturers have problems with...

 

yeah your right them solenoids go bad often to lol i work for a parts store and we get cars in throwing that code alot

 

So should I do what others do and disconnect my evap solenoid on the manifold?

 

I haven't checked the code yet but I know me cel was from my map sensor cause I got a little blow by so now I gotta take off my intake mani and clean it

 

just leave it alone until u go to the dealership. again, it doesnt affect driving at all only that initial startup once the gas cap has been open

 

I would take it to the dealer but warranty is up so regardless ima have to do it myself

And yea it starts up fine every time just not when the gas cap is open

 

u dont have 100k miles on ur lnf. take it to the dealership!

 

The gas gauge on my cobalt was dying/fucked up before I sold it, got quoted 400$ just to fix it, just use the trip counter for your miles

 

I guess I gonna have to go back to stock

 

Well ima try unhooking evap sensor first

 

the evap purge selenoid is only like $20 or so if you don't feel like going to the dealer and waiting on them and it literally takes like 2 seconds to switch out

had my friend bring me one changed it in a parking lot, but like everyone else is saying it will only give you trouble when filling up, i noticed mine if i didn't let it go all the way down to empty it would start right up

 

Yea mine is only when I fill up and I think that's the reason so ima try it first if it don't fix it I'll go to the dealer

 

reading is good for u man. i have way more mods than you most likely with an unlocked ecm and they still have to fix it because the malfunctioning part is not related to my modifications (magnusson-moss act). so go to the dealership and tell them...