[V8] Cold Start

[Buchholz, Steven]

... to me 2-3 seconds of cranking isn't too much of a problem ... but I do know that the V8 *can* fire quicker than that when cold.  

... the three things that could cause a leak down are the fuel pump check valve, the fuel pressure regulator and the injectors themselves.  It sounds as though you've addressed the two main candidates ... the one check that I do is that I crank the engine for a fraction of a second and release the key.  Now I wait a couple seconds and try again ... if the engine catches immediately I figure there's a problem with residual pressure.  

It seems to me that if you've got old plugs, cables, dizzy caps and rotors it might well contribute to difficult cold starting as well ... have you read out ECU codes?

Steve B
San José, CA (USA)
> 
> Michele_Deltergo at keybank.com wrote:
> >Going through the Bentley, there doesn't seem to be a cold start valve like
> >the I5's.  My car cranks about 2-3 seconds when cold before catching. New
> >FP/FPR + filter.