Re: 5kcstq: Continued warm-up trouble

[DeWitt Harrison <de@aztek-eng.com>]

On Tue, 15 Sep 1998 13:32:47 -0700, Wallace White wrote:

>I'm still having trouble with the car when it's cold. In the morning,
>after an overnight low of ~50 (just a guess), it starts just fine. It
>runs just fine for about one minute, and then starts stumbling. It often
>dies at this point, unless I modulate the gas pedal just right, and then
>it is very difficult to get it to start again.

I think the cold start valve stops firing. There is a brief  awkward period
between initial start and warm engine were restarting  is difficult anyway.
This is not an issue with a normally operating engine of course.

>Sometimes it then
>backfires. After running for 15 minutes or so (well after the temp gauge
>shows plenty of warmth), it has gotten over it and it runs fine.

My hunch is the electric heater in the fuel control pressure regulator
isn't getting juice or is burned out. If that is true, it won't get to
proper temp until the engine block is warm.

>This happens in the morning (55F, ~8-10 hrs after last running) but not
>when I'm driving home from work (70F, ~9 hrs after last running), when
>of course it's warmer outside. If I don't drive the car in the morning,
>though, it has the same trouble at night or whenever.
>[ ... ]

DeWitt Harrison
Boulder, CO
88 5kcstq