by al <abuonag@[EMAIL PROTECTED]
>
Feb 3, 2008 at 07:18 PM
On Feb 2, 9:39=A0pm, "Tube Audio" <tubeau...@[EMAIL PROTECTED]
> wrote:
> I have a 1987 Nissan Sentra California model.
>
> When I go to start it when it is cold I press the gas pedal to the floor
a=
nd
> release it and then turn the key.
>
> The car starts fine with a nice fast idle.
>
> Once I press the pedal even a little bit the fast idle is lost and the
car=
> dies immediately.
>
> The car will start and keep running if I keep my foot into the pedal a
bit=
> or if I set the choke.
>
> The problem is that I am losing my fast idle once I depress the pedal a
bi=
t.
>
> Once the car warms up it idles fine.
>
> Does this sound like a bad automatic choke mechanism or heater?
>
> I will first check to see if there is voltage going to it.
The California car has the electric choke so it is likely that's where
the problem is. On the non-California car the idle speed when cold is
determined by the control vacuum generated by the Vacuum Control
Modulator Valve (VCMV) which is mounted on the right fender with four
rubber vacuum lines and one three prong electrical connector going to
it. If your choke checks out OK, then test the VCMV. You can put a
vacuum gauge in the control vacuum line and see if it is low (2 to 3
"Hg) when cold and rises to 4 to 5 "Hg when hot. If it idles fine
when warm, it likely is one of these two components although there are
other possibilities. Good luck. Al
