What are you calling cold?
When in the 20s and 30s sometimes it helps to run with a little choke even
when "warmed up"
Notice how the oil pressure stays up because the pan is running cooler...
daveS
----- Original Message -----
From: "Andrew G. Taylor" <tayloran@mail.med.upenn.edu>
To: <datsun-roadsters@autox.team.net>
Sent: Tuesday, November 25, 2003 10:07 AM
Subject: Coughing/hesitation problem
> Hi all,
>
> With the last few days of great weather here in the northeast, I've been
> spending more time with my car than is usual for November. I'm sure
> it'll be snowing soon, but for now...
>
> Anyway, on to the problem. Recently, my 2000 has had problems
> accelerating under load, especially when cold. Essentially, the engine
> will start and warm pretty much as usual, although there is occasionally
> some light popping while warming up. Sitting in the driveway, with the
> clutch in, the engine RPM's will come smoothly up with the pedal once
> the engine starts to get warm.
>
> However, trying to actually drive the car or accelerate leads to
> coughing, hesitation, backfiring and general misery until the car
> reaches its final stable engine temp (just below the tiny Fahrenheit
> sign on the temp gauge). Usually if I can soldier through this phase
> and keep the RPM's up, the car will then smooth out.
>
> So, being pretty new at all this, I have several questions:
>
> 1) is the mixture too lean? The mechanic who has tuned my car in the
> past says if he richens the mix any more, I'll start getting tons of
> deposits on the plugs, but I don't know...
>
> 2) Am I depositing tons of junk on the plugs during the warmup that once
> it burns off, lets the engine run better?
>
> 3) do I have a spark or distributor problem?
>
> 4) carb problem?
>
>
> Any suggestions here would be appreciated, since I have to start
> troubleshooting somewhere.
>
> Thanks,
>
> Andrew
> 1970 SRL311-13183
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