Hard Start in Cold Weather

[GrayZoom]

Yes. The check valve gets stuck open allowing the fuel to drain back in the tank.

From what I have seen the plugs help out alot. Of course I only get 2-3 cold starts before the customer gets the car back. Haven't had any complaints as of yet.

That makes sense.

Wanna work on my car?

 

[GrayZoom]

Sounds to me like a fuel pressure drop (as BlkZoomZoom said). The "whine" you hear when turning the key halfway (to the on position, not start) is the fuel pump starting up. If the pressure drops a shitload, it will take a sec for the pump to build up fuel pressure to the fuel rail again. The cold weather could just be exacerbating the problem (further lowering the pressure, and putting added strain on the fuel pump, if it's really slow). I dont think it's the plugs, guys (and gals.
-Brook

Oh...I know that whine. I've noticed that my car takes a few more seconds to start in warm weather than my SO's 7 year old Tahoe. Hers starts as soon as it is turned over. Mine did do that in the beginning, but not anymore. Hopefully, they will be able to get to it Friday and get the problem corrected. I hate being without my car.