seeyaass

What's up guys every once in awhile (seems to be only when a change in temperature) if I start my car in the morning it will have a very rough Lopey idle and shut off..

Anyone experience this? Why? It sounds terrible for a few sec and will die .

umrdyldo

iTrader: (1)

Any codes?

The only time I had issues like that were from bad evap purge valve, but I don't remember it shutting off.

26gen4

my car does the same, its called a custom tune in 80 pound injectors

seeyaass

No check engine light. I think I need a evap sensor in the rear of the gas tank not the one on the manifold. Could that be it?

umrdyldo

iTrader: (1)

Always start with the one on the manifold. Its the most common failure

seeyaass

Ive checked that one. its good... the rear is bad gonna give that one a shot

CobaltSS 16

iTrader: (3)

are you on e85?

FutureEcotecOwner

Is it when the temperature is really cold? The cold could be e85. When I had to replace the Evap is was on manifold but car never shut off.

seeyaass

No im not on E85, it does it a lot if the temperature changes... I.E lets say we have been having 30* weather for a month. then one morning its 50* out it will stumble on a cold start , have a lopey idle and maybe shut off. then once it gets use to the temperature change it will start fine for the rest of the time. Right now its done it every week on cold start, I recently filled up my tank that's why I think its the sensor in the evap tank on the gas station.

its the only thing I could think of

dannysauer

iTrader: (3)

Heard this was common with the LNF but I could be wrong lol

kwood85

clean the throttle body and change the evap sensor under the hood first thing.

seeyaass

It seems to be, but no one knows the fix lol ive searched and seen multiple threads like this but no fix!