After I washed the car, exterior only, I took it out for 0.5 miles to get the residue of water off the rotors and parked it back into my garage. When I pulled in, I was clutch in, in 1st gear (sloped driveway). As I came to a stop the tach suddenly dropped to 1 bar. I thought I stalled, checked clutch and it was still in, put it to neutral, clutch still in, and tapped the gas a bit. It revved up and I clutched out. Idle was normal again.
Turned off and went inside.

Anyone know what happened? It was my first time seeing this.

 

tach at 1bar = 500RPMS. Ive seen my car go below 500rpm when it was searching for idle (no bars on dash)

check out the map sensor whack or do a tuneup!

 

Oh 1 bar is 500 RPMS? Thanks for the info!
I'm gonna check it out tomorrow to see if it's running normally (too late to start the car now, would wake everyone up)