Well I got my 04' Z about 4 months ago with 45k miles. It has a grounding wire kit on it and some aftermarket alarm. The start up issue didnt start until a month after owning it.

Problem: Intermittent problem starting up the car, cold or warm start. Car turnsover for about 4-5 long seconds before firing up.

A couple months after noticing the issue, the car threw a misfiring code -- I figure it was due to floodin the motor with gas tryin to start up when the problem arised. I had the dealership clear it and it hasnt occurer ever since (And I stopped the habit of giving the car gas when the problem happened again). I also had the dealer check if the NATs code was being interrupted with aftermarket alarm. I stopped using the aftermarket alarm ever since the problem occured so its never armed anymore.

Today I replaced the clutch position sensor (switch/button under the clutch pedal) -- still no bueno and problem still persists.

No codes are being thrown right now.

Im stumped on what to try next, and dont want to waste money where it doenst count.

Fuel related? fuel pump? aftermarket alarm still shorting out even after not being armed? (thinking about havin a shop remove it, but afraid of the cost). Some Z guys are saying ECU, anyway to check this at all?

Need your guys expertise,

Thanks!

 

BTW here is a video I just took. I drove the car earlier this morning with no start up problems, but this happened about 2 hours after.

http://www.youtube.com/watch?v=f6OFUJm_fTU