What are the symptoms of a bad EGR control solenoid?

One of the first symptoms of a possible problem with the EGR control solenoid is engine performance issues. If the EGR solenoid has any issues, it can cause the finely tuned air fuel ratio to be thrown off. This may result in a decreased power, acceleration, fuel economy, as well as an increase in emissions.

Are there any problems with the GM throttle position sensor?

GM Throttle Position Sensor Problems 1 Function and Location. Throttle position sensors (TPS) are usually located on the large butterfly valve that controls airflow into and out of an engine, called the throttle-body. 2 Inconsistent Idle. 3 Engine Stalling. 4 Erratic Shifting. 5 Maladjusted TPS. …

What should the base voltage be for the throttle position sensor?

Once the car or truck starts and is idling and since the throttle is closed, the TPS sends a base throttle position signal of about 0.5 to 0.9 Volts to the PCM on the Blue wire (this voltage will vary slightly on your vehicle but should be within the 0.5 to 0.9 Volts DC).

How is the EGR system controlled by the computer?

The EGR system is controlled by the EGR control solenoid. When the EGR control solenoid is activated, a passage is opened up that allows exhaust gases into the intake manifold. The EGR solenoid is controlled by the engine computer, and activated at very specific times in order to achieve…

What happens when the EGR valve gets stuck on a GM 4.3L?

This tutorial addresses a very common problem I’ve seen on the 1987-1995 GM 4.3L, 5.0L, and 5.7L engines with throttle body fuel injection system: a stuck open EGR valve. And when the EGR valve gets stuck open, it’ll cause a rough idle condition that may hard to diagnose.

Where is the vacuum inlet port on an EGR?

One side of the EGR vacuum solenoid (the one that has only one vacuum inlet port) connects to the vacuum port labeled with the letter J on the throttle body. In case you’re wondering, the letter J is embossed above the vacuum port on the throttle body. The other side of the EGR vacuum solenoid has 2 ports.

How does the fuel injection computer regulate the EGR valve?

The fuel injection computer is the one that regulates the opening and closing of the EGR valve thru’ the application and release of vacuum (through a vacuum solenoid). One side of the EGR vacuum solenoid (the one that has only one vacuum inlet port) connects to the vacuum port labeled with the letter J on the throttle body.

When does the Check Engine light come on on an EGR?

Check Engine Light comes on. An illuminated Check Engine Light is another symptom of a bad or failing EGR control solenoid. If the computer detects an issue with the EGR solenoid, circuit, or system, it will set off the Check Engine Light to notify the driver of the issue.

What are the symptoms of a failing EcoBoost solenoid?

Symptoms of a Failing Boost Solenoid – 2.0 EcoBoost 1 Engine builds no boost under acceleration 2 Poor performance, loss of power 3 Rapid changes in boost pressure 4 Decrease in fuel economy 5 P0299 engine code and check engine light

Is it possible to open the EGR valve solenoid?

So, while it is entirely possible to have a valve stick open and send excess EGR gases into the engine, it is not possible for there to be too much flow through the cooler itself.

What happens if you unplug the EGR while the truck is off?

Thanks in advance! If you unplug it, while the truck is off, then the EGR will stay closed. That said (so that this post doesn’t get deleted), if you do that you’re breaking the law. *** FOR INFORMATIONAL USE ONLY!***

Is the Check Engine Light a sign of a bad solenoid?

An illuminated Check Engine Light is another symptom of a bad or failing EGR control solenoid. If the computer detects an issue with the EGR solenoid, circuit, or system, it will set off the Check Engine Light to notify the driver of the issue.

Do you need to test the Ford EGR valve?

Testing the EGR system on your Ford, Mercury, or Lincoln car or truck is a pretty easy affair. You don’t need expensive testing equipment to do it and more importantly, with this article you’ll be able to find out exactly what part (of the entire system) is bad and needs to be replaced and in the process saving time and money.

When to test the Ford EGR valve solenoid?

The following are the most common symptoms that a Ford (or Mercury or Lincoln) car or truck will usually experience when there’s a fault in the EGR System: Car or truck runs fine, but the check engine light (CEL) is on with an EGR Valve Fault Code: P0401 EGR System Flow Insufficient. P01406 EGR Valve Pintle Position.

What are the symptoms of a Ford EGR fault?

The following are the most common symptoms that a Ford (or Mercury or Lincoln) car or truck will usually experience when there’s a fault in the EGR system: P0401 EGR System Flow Insufficient. P01406 EGR Valve Pintle Position. Rough Idle. Really bad gas mileage.

Can a GM idle air motor be removed?

When the throttle body or iac is removed a new gasket must be used to properly seal the connection to the intake. GM idle air motors are generally mounted on the throttle body and can be cleaned without removal from the throttle body. This means one less gasket and a lesser chance of creating a vacuum leak.

What does the idle air control valve do?

IAC – Idle air control – Controls the amount of air the engine is intaking while it is idling. Throttle body – Responsible for regulating flow of air into the engine as you press the gas pedal.

What to do if you have a bad EGR valve?

The first thing you do is to locate your EGR valve. You can take a look at the manufacturer’s guide of your vehicle to help you with this. Then put on your vehicle’s engine and rev your engine to about 2000 rpm. Gently create access to your valve and place your hand on it.

How does the engine control module detect a misfire?

The engine control module is using a lot of sensors to know when to ignite the spark plug and when to inject the fuel into the cylinder and to optimize the air-fuel mixture. To detect a misfire, the engine control module is often using the crankshaft sensor to detect a misfire.

What causes an engine to have a bad EGR valve?

and various engine sensors. An increase in hydrocarbon emissions isn’t necessarily caused by a stuck-open EGR valve. Problems in other systems may cause this same symptom as well: a leaking fuel injector, bad ignition timing, bad cylinder compression, bad oxygen sensor, or other problems.

What causes a GM truck engine to misfire?

It’s when one of these three (air, fuel or spark) are missing from the mix that the engine in your GM pickup, van or SUV starts to misbehave and misfire.

Can a lack of Spark cause a misfire?

because the cool thing is that no matter if you have misfire codes or No Codes at all, the core cause of the misfire is a lack of spark, or fuel or air (think engine mechanical problem such as: vacuum leaks, low compression, etc).