torque converter lock out engaged.
because your a failure and you obviously can't drive!
possibly a vacuum leak
If you mean each time you engage car in any gear forward or reverse & it immediately stalls - you have a bad torque converter. Start engine, put foot on brake, put car in NEUTRAL, if it DOES NOT stall, but it does stall if you repeat this test when you put car in drive or reverse = bad torque converter - It's called a "stall test"
It might be a problem with your transmission because not all mx6's stall when you put it in drive or reverse.
* cause it needs to be put in drive to go forward
vehicle stalls - what causes this problem many probs can cause stall a bit more info does it stall a stop signs does it run fine un til you stop and take foot off gas does it idle in park or neutral and stall when put in drive also need make model year and i could help you better
Try changing the fuel filter. I have a 1984 Mustang with 3.8L V6. On some older cars you tend to accumulate a lot of crud in bottom on fuel tank. And when you get to about 1/4 tank some of it comes up. I changed 2 filters in less than 6 weeks and have not had the problem again. Take a look at the motor mounts. I had a car that would stall when put in drive and while looking at it, when i shifted into gear the motor would tilt forward or back, some wires were being pinched off shorting out and causing the engine to stall when put into drive. If it shakes violently when it dies it is most likey your transmission. It happened to my Dodge.
Is your clutch bad or wearing out ?
The engine has problems; when the engine is put into gear it becomes loaded but does not have the power to support the load at idle. Have it scanned for possible faults/codes, run diagnostic on the engine, and/or tuning it up may help.
If it is a standard transmission, you would need to slowly let out the clutch while backing up.
what causes a boat motor 40 hp to stall when it is put in gear
Your truck may have the idle to low or the compressor might have some problems