Hi for like the last year I have been throwing an evap code, bone stock or modded, the only symptom I have noticed is when I get gas it takes forever to crank over

I have looked on here and all I have found is this

"Evap code coming back over and over ended up beeing my HPFP+Purge. She have a hard time starting sometimes when you get gas?"

I sent a pm to the person that posted that but I was hoping for a quick response, anyone have this problem, it's so embarrassing sitting there and having my motor crank for 20 seconds at the gas station

 

Ok so now I know that hpfp stands for high pressure fuel pump but I still don't know what the problem would be with it/ if I wold need to get it replaced, I'm assuming that isn't under warrenty lol

 

Go to Youtube and search EVAP. You'll see a video explaining to you how to remove and test your EVAP solenoid. The video is on a Sky, but it's the same drivetrain.

 

Kk thank you

 

you need a new evap purge soleniod it takes about 2 seconds to switch it out and it cost about 20 or so bucks to get one. you can get around it by filling your tank up half tank and not when it gets to empty.

 

DDMWorks - EVAP Solenoid Testing and Replacement on Ecotec engines - YouTube

Now that I'm home, I can post the link.

 

Also watch this video if you really want to know how the EVAP system works. It's boring, but effective.

Automotive Evaporative Emissions - Part One - YouTube

 

Thanks that was a lot of help, today I will check to see if my purge solenoid is stuck open but does anyone have a picture of where the vent valve is? If so is there a way to check that?

 

https://www.cobaltss.net/forums/5495711-post178.html

 

there are alotta threads on here about the purge evap solenoid. i think weve all had this problem pretty much.

 

Getting the vent valve today, and I forgot to mention that I have already replaced the purge solenoid once lol

 

The new valve requires an adapter for future notice for anyone having a similar problem

 

I had the same problem and a new purge valve fixed it. I bought it on ebay.

GM Pontiac Buick 12608378 Vapor Canister Purge Valve, Same as ACDelco 214-2125 | eBay

 

Are you sure you got the right one? What was the part number for the vent valve?

Have anymore information on the adapter, such as pics or the part number for that? This is the first anybody has said anything about that.

 

It is what my parts guy said at work (I work at a body shop) we got it directly from the dealer

 

That is the one on the manifold right I had replaced that already but I still have the problem so maybe I will check that again cause I am stumped

 

The vent valve is back at the tank and gives a p0451, I believe. The Purge Solenoid is on the intake manifold.

 

Replaced both and still having the problem maybe I need to cut the one bolt down on my exhaust off the top of the dp a lil cause I cross threaded one of the bolts the day before this happened so maybe that slight gap of having only 3 bolts tight off the top flange is causing this, if that is even possible...? I'm just flummoxed by this one...


I assume if it isn't that then I have a boost leak somewhere any common places I should check/how to check, I already checked the fmic

 

yea i bypassed my EVAP system. screw that crap. lol.

 

How? I'm just so f'ing temped, I just wish I would boost more than five lbs it makes me sad

 

Boosting normally now not sure why but not complaining

 

It's a Cobalt. It'll come back when you're out of state.

 

Rofl o no going outta state Thursday!!!! Lol

 

BWAHAHAHAHAHAAAA!!!!