When I start it and put it in drive, the RPM needle goes down and the car turns off?

ANGEL1042

MEMBER
1999 HONDA CIVIC
AUTOMATIC

Hi, I have a 99 honda civic ex automatic.I bought it with a burnt engine and replaced it with a d16z engine. It does not seem to burn oil or overheat. However my only concern is that when I start itand put it in drive, the rpm needle goes down and the car turns off. If it does manage to stay on, it shakes alot when im stopped. What can it be?

1 Reply

SQM

MECHANIC
6,383 POSTS

Hello,

It sounds you could have a clogged Idle air control valve which restricts air into the engine and it stall or runs rough.
Another possibility is the throttle position sensor. If the TPS is out of calibration it might not send the correct signal to the ECM and the ECM will not provide proper amount of fuel to keep the engine it running.
Many times cleaning out the IAC will help improve the idling of the engine. You might also want to clean the throttle body as well.

You might find these articles helpful:

https://www.2carpros.com/articles/how-a-idle-air-control-valve-works
https://www.2carpros.com/articles/idle-air-control-valve-service

https://www.2carpros.com/articles/how-a-throttle-body-works

I have attached diagrams for your reference.

Please let me know of any questions.

Thank you.

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