When to throw an opti code on Chevy Impala?

When to throw an opti code on Chevy Impala?

The 02’s can get slow to respond, and the car will miss until the slow 02 catches up to the real conditions. The opti will not throw an opti code (36 or 16) until it gets so bad that the car sporadicaly cuts out, and won’t restart.

How can I tell if my ignition module is bad?

Connect the timer to the positive terminal of the battery and check the continuity of the black output wire while cranking the starter. If the light blinks, the module is good. If the light is blank or constant, the module is bad. Before you attempt to replace the control module, you must rule out other ignition system components.

Why does my Chevy Impala engine slow down when I accelerate?

If I accelerate slowly the car will rev up fine. It started almost a week ago. Now I notice that the car will occasionally have a miss when idling. Check your spark plug wires for melted or ruined ones or ones touching headers. Sounds like it’s missing.

What to do if your Chevy Impala engine bogs down?

Make sure before you do anything to check that the CAI is clamped good, and make sure there is no air leaks between the MAF and the TB. If you don’t know how old the fuel filter is, replace it. A restricted fuel filter will starve the engine of fuel under load.

What are the symptoms of a bad ignition coil pack?

Common Symptoms Of A BAD Ignition Coil Pack And/Or Spark Plug Wires. The most common complaint is that your car (or mini-van) will start and run, but run with a misfire. Here are few others symptoms that your car or mini-van may be experiencing: The check engine light (CEL) will be illuminated on your instrument cluster but not always.

Where are the ignition coil packs located in a dis?

In this type of Direct Ignition System (DIS), three individual ignition coil packs are mounted right on top of the ignition control module (ICM). As you already know, each coil pack comes with two towers that fire off a spark to two different cylinders simultaneously.

How are the coils on an ignition control module controlled?

That each of the individual coil packs sitting on top of ignition control module are controlled by a Switching Signal. This Switching Signal is created by the ignition control module. That it’s nearly impossible for all three ignition coils to go BAD.

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