How can I tell if my GMC Truck has a hard start?
The first step in diagnosing a hard start or no start on a GMC or Chevy truck with one of these systems, therefore, would be to check fuel pressure. If fuel pressure is less than the KOEO specification, you need to test the fuel pump and its voltage supply circuit.
What kind of fuel injection does a GMC use?
Back in 1992, General Motors introduced a new type of fuel injection system known as “Central Port Injection” (CPI), which GM also refers to as “Central Multi-point Fuel Injection” (CMFI). The system was used on 4.3L V6 Vortec engines through 1995, and was redesigned in 1996 and renamed “Central Sequential Fuel Injection” (CSFI).
What causes a 5.3 L Vortec engine to fail?
The 5.3 L Vortec engines also had a problem with carbon buildup around the spark plugs. This typically happens in engines manufactured from 2007 to 2011. Carbon build-up caused by the PCV valve and the valve cover could end up causing the spark plugs to fail.
Why is the 5.3 litre Chevy engine unreliable?
Because the gasket was also known to be poor quality it can cause an additional leak in the manifold. Both of these mean that you’re going to be running a lean fuel mix which lowered overall engine performance. This also led to rough idling, and the lack of power.
What are the symptoms of a bad engine control module?
1. Check Engine Light Turns On 2. Engine Stalling or Misfiring 3. Engine Performance Issues 4. Car Not Starting 5. Poor Fuel Economy The engine control module (ECM), also commonly referred to as the engine control unit (ECU) or powertrain control module (PCM), is one of the most important components found on virtually all modern vehicles.
Can a bad ECM cause a car to be undrivable?
When the ECM has any issues, it can cause all sorts of problems with the vehicle, and in some cases even render it undrivable. A bad or failing ECM may produce any of the following 5 symptoms to alert the driver of a potential problem.
What makes a GM 6.0 liter V8 so powerful?
The 6.0L is powerful, but delivers exceptional refinement to go with great strength. Quiet features built into the engine are complemented by an improved engine cradle and mounting system. These help reduce vibrations transmitted through the chassis and into the passenger compartment.
Can a knock sensor cause a car ECM to fail?
There’s also a knock sensor on the engine itself. While these sensors aren’t likely to cause any catastrophic problems, failures in these areas can cause your ECM to make unnecessary adjustments that affect your car’s performance. In these cases, though, the problem is usually with the sensors, and not with the ECM.