Sluggish When Cold

[pezzonovante88]

When I take the D out after it sitting overnight, it really lags under even the lightest acceleration up to roughly 3000rpm. In the higher revs it's fine, but I clearly won't rev it too high when cold. After a few kms (or miles haha) it goes back to normal - still sluggish, but sluggish in the way it's suppose to be ;)
Any idea what this could be or is it normal?

[DMCMW Dave]

When I take the D out after it sitting overnight, it really lags under even the lightest acceleration up to roughly 3000rpm. In the higher revs it's fine, but I clearly won't rev it too high when cold. After a few kms (or miles haha) it goes back to normal - still sluggish, but sluggish in the way it's suppose to be ;)
Any idea what this could be or is it normal?

Typically a bad warmup regulator, or something wrong in the vacuum lines and/or delay valve that connect to it. The vacuum diagram is glued to your engine cover - check to make sure that everything is hooked up as shown (3 of the connection are under the intake but can be reached as sort of a dexterity test.).

[Bitsyncmaster]

Have you checked the mixture adjustment? Very critical to have it correct since the O2 sensor has not warmed up yet and your running open loop lambda.

[pezzonovante88]

Have you checked the mixture adjustment? Very critical to have it correct since the O2 sensor has not warmed up yet and your running open loop lambda.

Good point. I don't recall it doing this before I fiddled around with the mixture. However, in order to keep it from idle hunting I needed to adjust the mixture.

[pezzonovante88]

Typically a bad warmup regulator, or something wrong in the vacuum lines and/or delay valve that connect to it. The vacuum diagram is glued to your engine cover - check to make sure that everything is hooked up as shown (3 of the connection are under the intake but can be reached as sort of a dexterity test.).

I will look into the vacuum possibility as soon as I get time to get the car out.

[Bitsyncmaster]

Good point. I don't recall it doing this before I fiddled around with the mixture. However, in order to keep it from idle hunting I needed to adjust the mixture.

Than your mixture is set to rich. Never adjust mixture just based on best idle. It will mess up your normal running.

[David T]

If it runs OK after it warms up it is probably the CPR aka warm-up regulator. It can also be a problem with the vacuum lines for the vacuum advance.
David Teitelbaum