Engine idles bad and black smoke

TONY’S NISSAN

MEMBER
1996 NISSAN HARDBODY
2.4L
4 CYL
4WD
MANUAL
18,000 MILES

Truck won’t stay running, at idle goes from about 800 rpm to below 400 then sputters and Shuts off. TPS sensor has been removed and reinstalled to check for problem when I drive it the engine acts like the fuel has been cutoff and it stumbles then it clears up for a few seconds then does it again.

3 Replies

SCGRANTURISMO

MECHANIC
4,897 POSTS

Hi Tony, my name is Alex and I will be helping you today.

This sounds like it could be a problem with your Idle Air Control Valve(IAC). Here is a component diagram and a helpful link for you. Let us know what you find out.
https://www.2carpros.com/articles/engine-black-smoke https://www.2carpros.com/articles/how-to-replace-an-idle-speed-control-motor-iac

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Thursday, January 31st, 2019 AT 7:41 AM

KEN L

MASTER CERTIFIED MECHANIC
47,690 POSTS

Can we run the codes to see if any comes up? here is a guide that will help you:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Please run down this guide and report back.

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Thursday, January 31st, 2019 AT 4:42 PM

TONY’S NISSAN