If your 87 Chevy truck turns over but won’t start, don’t worry. This is a common problem with older vehicles.
In this blog, we will discuss possible reasons and solutions for this issue. Your truck might not be starting due to several factors. It could be a problem with the fuel system, ignition system, or even the battery. Understanding these issues can help you diagnose and fix the problem.
We’ll guide you through each potential cause step-by-step, making it easier for you to get your Chevy truck running again. Whether you’re a seasoned mechanic or a beginner, this guide will provide useful insights and practical tips to resolve the issue efficiently. Stay tuned to learn more about your truck’s starting problems and how to fix them.
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Common Issues
Is your 87 Chevy truck turning over but not starting? This can be frustrating. Several common issues might be causing this problem. Understanding these issues can help you fix your truck.
Battery Problems
The battery is crucial for starting your truck. If your battery is weak or dead, the engine might not start. Here are some signs of battery problems:
- Dim headlights
- Clicking noise when turning the key
- Corroded battery terminals
Check the battery voltage with a multimeter. It should read around 12.6 volts when fully charged. Clean any corrosion on the terminals. Sometimes, replacing the battery is necessary.
Fuel System Failures
The fuel system delivers fuel to the engine. If there’s a problem, the engine won’t start. Here are some common fuel system issues:
- Clogged fuel filter
- Faulty fuel pump
- Empty fuel tank
Check if you hear the fuel pump when turning the key. Replace the fuel filter if it’s clogged. Make sure there’s enough fuel in the tank. If the pump is faulty, it might need replacement.
Checking The Battery
If your 87 Chevy truck turns over but won’t start, the battery might be the problem. Checking the battery should be your first step. Batteries can lose charge or fail over time. Here, we will cover two key areas: battery voltage and corroded terminals.
Battery Voltage
Check the battery voltage with a multimeter. A fully charged battery should read around 12.6 volts. If the voltage is below 12.4 volts, the battery might not have enough charge. This low charge can prevent the truck from starting. Recharge or replace the battery if needed.
Corroded Terminals
Inspect the battery terminals for corrosion. Corroded terminals can prevent proper electrical connections. Look for white or greenish deposits on the terminals. Clean the terminals with a wire brush or terminal cleaner. Ensure the connections are tight after cleaning. This can help restore a good connection and might solve the starting issue.
Inspecting The Fuel System
Having trouble with your 87 Chevy Truck that turns over but won’t start? The issue might be in the fuel system. The fuel system is crucial for your truck’s engine to run. Proper inspection can identify the problem. Let’s dive into two key parts: the fuel pump and the fuel filter.
Fuel Pump
The fuel pump is responsible for moving fuel from the tank to the engine. When it fails, the engine doesn’t get the fuel it needs. To check the fuel pump, listen for a humming sound when you turn the key. No sound means the pump might be faulty. Check the pump’s wiring and connections. Ensure they are secure. If everything looks fine, a professional might need to test the pump’s pressure.
Fuel Filter
The fuel filter keeps dirt and debris out of the engine. A clogged filter can prevent fuel flow. Locate the filter along the fuel line. Remove it carefully and inspect it. If it looks dirty or clogged, replace it. A new filter can restore proper fuel flow to the engine. Regularly changing the filter can prevent future problems.
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Spark Plug Inspection
Experiencing issues with your 87 Chevy Truck that turns over but won’t start can be frustrating. One key area to inspect is the spark plugs. Spark plugs play a crucial role in igniting the fuel-air mixture in the engine. Without proper function, the engine won’t start. Let’s dive into the spark plug inspection to get your truck back on the road.
Spark Plug Condition
First, assess the condition of the spark plugs. Remove one spark plug at a time. Check for signs of wear or damage.
- Carbon buildup: Black, sooty deposits indicate the engine is running too rich.
- Oil deposits: Oily plugs suggest oil is leaking into the combustion chamber.
- Burnt electrode: White or blistered electrodes mean the engine is running too hot.
Replace any spark plugs with these issues. Proper spark plug condition ensures efficient ignition.
Spark Plug Wires
Next, inspect the spark plug wires. Faulty wires can prevent the spark from reaching the plug.
- Check for any cracks or breaks in the wires.
- Ensure the wires are securely connected to both the spark plug and the distributor.
- Look for signs of corrosion at the connections.
Replace any damaged or worn-out wires. Good spark plug wires are essential for a strong, consistent spark.
By carefully inspecting the spark plugs and wires, you can identify and fix issues preventing your 87 Chevy Truck from starting. This simple inspection can save time and money, ensuring your truck runs smoothly.
Ignition System
The ignition system of your 87 Chevy truck plays a critical role in starting your vehicle. If the truck turns over but won’t start, the issue might lie in the ignition system. Let’s delve into key components such as the distributor cap and ignition coil.
Distributor Cap
The distributor cap is a crucial part of the ignition system. It sends high voltage from the ignition coil to the spark plugs. If the distributor cap is cracked or worn out, it can cause starting issues.
Here are signs of a faulty distributor cap:
- Visible cracks on the cap
- Corrosion on the contacts
- Carbon tracks inside the cap
Replacing a damaged distributor cap can help your truck start smoothly.
Ignition Coil
The ignition coil transforms the battery’s voltage into a higher voltage. This high voltage is needed to ignite the fuel. A faulty ignition coil can prevent the engine from starting.
Common signs of ignition coil problems include:
- Engine misfires
- Poor fuel economy
- Difficulty starting the engine
Testing the ignition coil with a multimeter can help diagnose the problem. Replacing a faulty ignition coil can resolve the issue.
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Air Intake System
The air intake system is essential for your 87 Chevy truck’s engine. It provides the necessary air for combustion. If your truck turns over but won’t start, the air intake system might be the issue. Let’s look at some key components.
Air Filter
The air filter keeps dirt and debris from entering the engine. A dirty or clogged air filter can restrict airflow. This can prevent your truck from starting. Check your air filter. If it’s dirty, replace it. This simple step can make a big difference.
Mass Air Flow Sensor
The mass air flow sensor measures the air entering the engine. It sends this data to the engine control unit. A faulty sensor can give incorrect data. This can lead to starting issues. Clean or replace the sensor if needed. This helps ensure proper air-fuel balance.
Engine Compression
Engine compression is crucial for the proper functioning of your 87 Chevy truck. It ensures the air-fuel mixture in the cylinders ignites, powering the engine. If your truck turns over but won’t start, low compression might be the culprit. Diagnosing this issue involves a few key steps.
Compression Test
A compression test helps measure the pressure in each cylinder. This test identifies if the engine has low compression. You will need a compression gauge and follow these simple steps:
First, remove the spark plug from the cylinder you are testing. Insert the compression gauge into the spark plug hole. Turn the engine over a few times. Record the reading on the gauge.
Repeat this process for each cylinder. Compare the readings to the specifications in your truck’s manual. Consistent low readings indicate a compression issue.
Possible Causes Of Low Compression
Low compression can stem from various issues. Worn piston rings are a common cause. They allow air to escape, reducing pressure. Damaged cylinder walls also lead to low compression. They prevent proper sealing, causing leaks.
Another cause is a blown head gasket. It allows air and coolant to mix, lowering pressure. Additionally, faulty valves can cause low compression. They may not seal properly, letting air escape.
Lastly, timing issues can affect compression. If the timing chain or belt is off, valves and pistons won’t sync correctly. This misalignment reduces compression.
Understanding these causes helps identify and fix the problem. Regular maintenance can prevent these issues, ensuring your Chevy truck runs smoothly.
Electronic Control Module
The Electronic Control Module (ECM) is crucial in your 87 Chevy Truck. It manages various engine functions, ensuring your vehicle runs smoothly. Issues with the ECM can cause your truck to turn over but not start. Let’s dive into how the ECM works and how you can reset it to potentially fix starting issues.
Ecm Function
The ECM is the brain of your truck’s engine. It controls fuel injection, ignition timing, and emissions. Here are some key functions:
- Fuel Injection: Adjusts the amount of fuel entering the engine.
- Ignition Timing: Controls the spark timing for efficient combustion.
- Emissions Control: Reduces harmful emissions by managing exhaust gases.
If the ECM fails, your truck might crank but not start. Recognizing these functions helps you understand the importance of the ECM in engine performance.
Resetting The Ecm
Sometimes, resetting the ECM can solve starting issues. Here is a simple guide:
- Disconnect the Battery: Remove the negative cable from the battery. Wait for 15 minutes.
- Reconnect the Battery: Reattach the negative cable to the battery.
- Start the Engine: Turn the key to the on position for a few seconds. Then try starting the engine.
This process resets the ECM and can clear any temporary issues. If your truck still won’t start, further diagnostics might be necessary.
Frequently Asked Questions
Why Won’t My 87 Chevy Truck Start?
Your truck may have issues with fuel, spark, or air delivery.
How Do I Check The Fuel System?
Ensure there’s fuel in the tank. Check the fuel pump and fuel filter for clogs.
What Should I Inspect In The Ignition System?
Look at the spark plugs, distributor cap, and ignition coil. They should be clean and functional.
Can A Weak Battery Cause Starting Issues?
Yes, a weak battery can prevent the engine from cranking properly. Check the battery voltage.
Could A Faulty Sensor Be The Issue?
Yes, a bad sensor like the crankshaft position sensor can stop the engine from starting.
Conclusion
Fixing an 87 Chevy truck that turns over but won’t start can be challenging. Check the battery, fuel system, and ignition components. Inspect wiring for damages or disconnections. Regular maintenance prevents such issues. Consult a mechanic if problems persist. Understanding these basics helps in troubleshooting.
Keep your truck in good shape for reliable performance. Stay patient and methodical with repairs. With care, your truck can run smoothly again.