Okay, or did you unplug a sparkplug wire? I see this car has a distributor system. Here are the wire colors for the fuel injectors
Don't touch a sparkplug wire while the engine is running, you'll get a bad electrical shock
Okay, so I see this code p1400 is the EGR and canister control solenoid valve, the canister is part of the Evap system, which is a sealed system that takes the fumes from the gas tank and purges them into the engine at a metered rate. If that solenoid is stuck open it can cause a rich condition as well. Meaning too much fuel is getting into the engine. I would replace that valve first, and then see how it runs.
It's odd that this system would have the EGR and evap system combined like this. But that's the way this one is built. An overly rich system can definitely cause white smoke like this, that's why I thought of an injector first. I didn't realize that solenoid controlled both systems. After you replace the valve, erase the codes and give the car some time to burn that extra fuel out of the intake manifold.
Images (Click to enlarge)
Tuesday, October 5th, 2021 AT 12:36 PM