Re: Warming Up ??

["John Hervey" <dherv10@xxxx>]

James, 
I'll throw in my 2cents worth. As you know the cold start valve 
shoots gas into the system to assist starting, Then the Lambda unit 
send's out a steady pulse for the frequency valve to run the cars 
richer untill the 02 sensor warms up and kicks in. Then the 02 sensor 
tells the frequency valve to back off the gas. Thus a little rougher 
idle at first. If your 02 sensor is older and not coming on as fast 
then you may have a few seconds of richer burning. Try unplugging the 
frequency valve so it won't run so rich and see what happens. 
Something is definitely going on. My 11004 cranks up fine and cold 
even idles ok. If you put a scope on the lambda unit output you will 
see the square wave going to the frequency valve and the duration of 
how long it's open or running. Maby in our 105 degree weather is why 
I'm not having trouble in Dallas, Tx. Cooler weather my be more 
sensitive. Water is normally 7 degrees cooler inside something.
Hope's this helps a little. One other thing, make sure the cold start 
isn't still shooting gas into the system. It's supposed to shoot a 
little gas for a second or two. Then shut off. Maby look at the temp 
switch.
John
11004


--- In dmcnews@xxxxxxxxxxx, "James Teston" <orentha@xxxx> wrote:
> In the Owner's Handbook, it says "When the engine is cold, drive 
the 
> car as soon as the engine has started. Do not warm up the car by 
> allowing it to idle for long periods with the car stationery." 
(it's 
> on page 15)
> 
> Is that right ?? If I don't warm my D up for at least a few 
> minutes, it runs very rough, almost to the point of dying. But if 
I 
> let it warm up, it runs just fine.
> 
> Is that a typo, or why would it say that ??
> 
> Thanks,
> James Teston #15314