Engine stalling when in gear.

[douglas17]

Engine stalls when in gear, with foot on the brake. Engine was running fine , transmission shifted smoothly drove about 20 miles. First stop light, foot on brake engine stalls. put it in park engine starts right up, put it in drive engine stalls. brought it home and with back wheels off the ground engine ideals with trans in R or D with wheels spinning. Wheels back on ground engine stalls.
Could the torque converter be the cause ? Engine is 340 with 727 auto trans. Fluid is clear and no smells.

 

[Ricks72Chlgr440]

What car? What carburetor and ignition do you have? Is the fuel fresh?

 

[moparleo]

Any type of recent work done on the car, or this is just out of the blue.
Ran perfect and then one day problem just started ?

 

[540HemiCuda]

Several different things could be the issue. More details are definitely needed to be of much help.

 

[Xcudame]

Could also be a torque convertor gone bad. It happens!

 

[Chryco Psycho]

Often carb tuning , any carb has a Power Valve circuit but different ways to tune it , if the vacuum drops too low at idle in gear the powervalve will open & add fuel enrichening the fuel mix causing it to stall . You need to get a vacuum reading at idle in gear , the power valve needs to be 2" lower than that reading to stay closed