Erratic idle feels like it is going to shut off

COLETURNER08

MEMBER
2002 HONDA CIVIC
1.7L
4 CYL
2WD
MANUAL
179,000 MILES

I have the car listed above EX model. In the last few months just about everything has been replaced. When it starts and idles it spits and sputtering and then sounds like it wants to shut down. Already put a new IAC on it and other parts that has same symptoms. The transmission did break! But we did get another but it’s from a 2003 Honda Civic LX our car is listed above would the transmission be causing the problem? We have tried everything we can think of but to no luck car is still having that idle problem and it also does it as we are driving. We can’t afford to take it to a garage and it’s our only running car. Any help or suggestions would be greatly appreciated thank you!

1 Reply

JACOBANDNICKOLAS

MECHANIC
109,645 POSTS

Welcome to 2CarPros.

Have you checked for diagnostic trouble codes? If the check engine light is on, that needs done first. Here is a quick video showing how it is done:

https://youtu.be/YV3TRZwer8k

Now, I realize most people don't own a scanner, but most parts stores will check it for free or lend / rent a scanner to you. If the check engine light is staying on when the engine is running, do this first.

Next, have you checked to confirm fuel pump pressure is within the manufacturer's specs? A faulty pressure regulator can cause pressure to build and force too much fuel into the engine.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Also, have you checked for engine vacuum leaks? They can also cause this type of an issue.

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Here is a link you may find helpful. It deals with a rough idle or misfire at idle.

https://www.2carpros.com/articles/engine-vibration-at-idle

Let me know if any of this helps or if you have other questions.

Take care,
Joe