Well I changed my head gasket about 4months ago, and ever since then my car has been dying alot. Whenever im cruising and I take it out of gear, the rpms drop all the way down and die. I have no CELS. This doesnt always happen, but I'd say 3 out of 4 times it dies. It gets really frustrating because sometimes i try to keep it from dying, and paying attention to the road at the same time. I find my self, braking and reving back and forth to keep it running.

When it dies, it takes a few seconds for it to start back up. Also, at the same time this was happening, my car had a really bad stutter/hesitation when i accelerate in all gears. Then one day, i bottomed out and I accidentally smashed my o2 sensor and my CEL came on and the hesitation stopped. I assumed it was a bad o2 sensor so i just replaced it last week.

So last night i was crusing and the studdering/hesitation **** started happening again.
Its pretty ******* annoying, because now i have to worry about my car dying and now accelerating. The studdering only happens every now and then though. So as of right now i have NO CELS, already is already checked.

Cliffnotes: car dies when taking out of gear 3 out of 4 times, car studders/hesitates when o2 sensor is hooked up and no CEL. When o2 sensor is damage and CEL is on studdering goes away.

PS: i have a little bit of a head gasket leak, but I dont see how that would change if an o2 sensor is hooked up or not

On the evap purge solenoid, there was a roudn black cap on it, but I lost it when i changed my head gasket, so i capped it off with a regular vacuum cap. I think that might affect some of my problems. Heres a pic of it, right now its capped off.

 

anyone?