Hello..
I bought this 1991 LS 400, the car comes from Japan.
A little issue started about 2 days ago. While driving my car on the highway at a steady speed of 60mph, idle started to knock slightly.
When I got home, my girlfriend got out of the car while engine was still running, she closed the door...The idle dropped a good 400 rpm for 1 second or 2, then came back to it's original idle speed!
I noticed that when I punch my handglove compartement, I get a 500 rpm loss!
Also, if I hit a big bump while slowin' down or breaking, the engine shuts down and I have to restart it.
Somebody has an idea of what could be the problem?
Loose connection? or something to do with a sensor?
**Battery connection is good and tight
Your help is greatly appreciated! B)
