Sometimes when I start my car for the first time it will stumble and sound cammed but just worse.. Now recently when I start it it will start then ahit off within the first few seconds.. Then I start it up again and it's fine.. Any ideas?

 

evap solinoid?

 

Evap Solenoid. Unplug that ****

 

I just made a thread about this last week. A lot of peoples LNF's have this problem but it seems that most people just ignore it. I will have to take a look at the Evap Solenoid. Some people also mentioned that it may be my BYT tune which it looks like you also have.

 

The Evap solenoid on the manifold? And my cat warm up is tuned off I know if it was on it wouldn't do it. Once u unplug the Evap I get a cel tho right?

 

My cat warm up is not turned off and my car still does this

 

im thinkin it might be the evap in the rear of the car. I notice it only does this when its really cold out or below 45*

 

did you check the one on the manifold?

front is purge solonoid rear is vent

 

yep front one is good. cant blow through or suck in. that sounds bad lol

 

I just noticed this last night, it got cold and when i started my car i got a horrible rattling noise for 2-3 seconds which is probably my Cam Phasers not parking correctly, but the car sounded cammed and stumbled then it was fine

 

I love seeing threads like this and then being ignored when I say that the majority of the times the issue lies in the tune. Sometimes it's of course not and can be a sensor or mechanical issue but 8 times out of 10 it lies within the tune itself. Ask sully20 about his experience and subsequent resolution to his constant hard start issues he had with his tune before I fixed it. It's not to say the tune is "bad", I'm just simply saying that quite a few cold start issues that are happening below 40-50* or so are usually tune related and are easily fixable.

 

I'm pretty sure I got a boost leak somewhere so im going to do some hunting on Friday for it.