Anyone dealt with idle control valve issues on a Chevy Silverado?

Chevrolet Models Chevrolet Silverado
1

I’ve been having some issues with my Chevy Silverado lately, specifically with the idle control valve. I want to share my experience and hopefully get some advice from others who might have dealt with similar problems.

Symptoms of a Faulty Idle Control Valve

Some symptoms I noticed include:

  • Irregular Idle Speed: The engine revs up and down when I’m stopped.
  • Stalling: It sometimes stalls at traffic lights after coming to a stop.
  • Check Engine Light: The dashboard is lighting up more frequently, which doesn’t seem normal.

Locating the Idle Control Valve

From what I’ve been able to gather, the idle control valve is located on the throttle body. It’s a bit of a tight space to work in, especially with older models. If anyone has tips on how to access it easily without disassembling too much, that would be super helpful!

Replacement Guidance

I’ve done some research, and it seems like replacing the idle control valve can be a DIY job, but I’d love some steps or a guide if anyone’s done this before. I’ve also seen some YouTube videos demonstrating the process, but sometimes they skip key details.

Wiring Diagrams

If anyone has wiring diagrams for the older Silverado models, I’d appreciate it. It would help me ensure everything is connected properly once I replace the valve.

Community Input

I’m really looking for any input on:

  • Your experiences with idle control valve issues.
  • Tips for replacing it.
  • Any other possible causes if the idle symptoms persist after replacement.

Thanks in advance for your help! I’m eager to get my truck running smoothly again.

2

I’ve had some issues with my Silverado’s idle control valve. It was stalling intermittently and throwing off the idle speed. Definitely check for erratic fluctuating RPMs.

3

That sounds frustrating! I experienced poor fuel economy too when mine was acting up. Have you replaced it yet?

4

Common symptoms also include a check engine light, which can be triggered by the idle control valve malfunctioning. Definitely worth having it scanned!

5 Likes
5

Good point! Also, has anyone noticed engine stalling when coming to a stop? That’s what scared me initially!

6

Yes! Engine stalling is a definite sign that something’s off. It could also lead to some sketchy situations on the road, so it’s best to diagnose it ASAP.

7

I think it’s not just the idle control valve; it could also be dirt buildup or electrical issues causing it to misbehave. Anyone have experiences with cleaning it?

8

I agree, Robert! Cleaning can sometimes solve the problem temporarily, but replacement might be inevitable.

6 Likes
9

Did someone mention poor fuel economy? Mine went from 20mpg to 15mpg right before I noticed the idle issues. Super frustrating!

8 Likes
10

That’s a major drop! How did you handle it? Did replacing the valve improve your mileage?

3 Likes
11

Replacing the valve did wonders! Back to a more normal mpg now. Just make sure to reset the ECU when you put a new one in.

12

Also, don’t forget to clear any codes after the installation. It can make a big difference in diagnosing future issues.

13

Anyone ever try a DIY cleaning solution? I heard some people use carb cleaner. Does that actually work?

14

I’ve done that! It helped in the past, but it was a temporary fix. Just don’t soak it too long.

15

What about getting a used one? I know it’s risky, but sometimes you can find a good deal. Thoughts?

16

Honestly, I’ve seen worse. I had a friend with a truck that wouldn’t start at all! At least we’re talking about minor issues here.

5 Likes
17

I wouldn’t recommend it! You might have the same problems again. Better to go with a new one for reliability.

5 Likes
18

I recently had an issue with my idle control valve on my Silverado too. Replacing it was straightforward! You’ll need a socket set, screwdrivers, and some replacement gaskets. Make sure to disconnect the battery first to avoid any electrical issues.

19

Awesome advice, Stephen! I’ve got some basic tools, but what specific socket sizes do I need? Any tips on disconnecting the electrical connectors without breaking them?

20

You’ll typically need a 10mm socket for the bolts, and just be gentle with the connectors. A flathead screwdriver can help pop them off safely! Also, remember to clean the mounting area well before installing the new valve.