Why does the check engine light in my Bonneville turn on when I start my car?

Generally, your check engine light turning on upon ignition is not a bad thing. This is a sign that your vehicle is testing its circuits. The light should turn off in a bit, but come see us if it doesn't.

Are Pontiac Bonneville engine noises bad?

Strange under-the-hood noises can point to problems within your Pontiac Bonneville engine. Knocking or tapping could be a symptom of low oil. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing can be traced back to a loose fan belt, and grinding could be a sign that something is wrong with your brakes — not the engine.

What could damage my Pontiac Bonneville engine?

Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, revving your engine while the vehicle is in Park, or pushing 'the pedal to the metal' before the engine has warmed up. Steer clear of these habits to help protect engine performance and efficiency.

Can I use water in my Pontiac Bonneville radiator?

Only in emergencies. A 50/50 mix of coolant and water (or a pre-mixed) coolant is recommended. However, if you must keep driving when you're out of coolant, it's better to drive with water in your coolant reservoir than nothing.

Why did my Bonneville engine suddenly stop?

There are different reasons your Bonneville vehicle engine could suddenly stop. You may be looking at a lack of fuel, faulty sensors, issues with the ignition system, engine overheating, electrical problems, or mechanical troubles.

Who can repair my Pontiac Bonneville engine?

Your local Firestone Complete Auto Care has you covered with expert Bonneville engine repair. Schedule an appointment today and see us at one of our thousands of locations.

Engine Repairs for Your 1986 Pontiac Bonneville

Learn about

1986 Pontiac Bonneville Trim Options

Select your Pontiac Bonneville trim level to learn more about Pontiac-recommended engine repair. Even Pontiac Bonneville parts will get older and change.

V6/3.8L

V6/4.3L

V8/5.0L

Repairs for Your 1986 Pontiac Bonneville

Nothing stays the same forever. Even your Pontiac Bonneville's many parts and pieces. We’re here to help when something stops working. Select a service or repair below to learn more about what we can do for your 1986 Pontiac Bonneville.

We Know Pontiac Bonneville Engines

The Pontiac Bonneville is respected for its reliability. You may have even been thinking about that when you bought it. However, the wear-proof engine has yet to be invented! Things can go sideways sometimes. If they do, you’ll have to find a dependable 1986 Pontiac service center — quick! That's when it's time to head to Firestone Complete Auto Care. We've serviced more than 500 million vehicles since 1926, and our technicians know Pontiac Bonneville engines. If you think something’s wrong with your engine, schedule an appointment at your convenience. Firestone Complete Auto Care is a top choice for professional engine diagnosis, service, and repair at an affordable price.

Illuminated Check Engine Light on 1986 Pontiac Bonneville

As soon as your Bonneville check engine light turns on, it’s time to get an expert’s opinion. A check engine light that’s on or flashing could be a symptom of a serious problem in your fuel injection, Potential causes may include a faulty oxygen sensor, damaged spark plug, a problem with your catalytic converter, or a leaking engine vacuum, but that's only a few of the possible causes. Bring your Bonneville to Firestone Complete Auto Care to get computerized diagnostics and our expert techs will get the root of the problem. Other signs your Pontiac Bonneville engine needs some TLC are burning smells, or engine misfiring.

Pontiac Bonneville Engine Repair

If your 1986 Bonneville engine needs repairs, our expert techs will let you know what needs to be done and why before they get started. We make recommendations, but you make the final decision. If a repair can wait, we'll let you know. If it's necessary for your safety, we'll make sure you understand that, too. We seek to give you all the info you need to make a smart decision about our services. Turn to Firestone Complete Auto Care for your 1986 Bonneville engine repairs and you can feel good knowing that we only use Pontiac-compliant replacement parts such as the cambelt, motor oil seal, sensors, or a different component.

Questions About 1986 Pontiac Bonneville Engines

Why does the check engine light in my Bonneville turn on when I start my car? Generally, your check engine light turning on upon ignition is not a bad thing. This is a sign that your vehicle is testing its circuits. The light should turn off in a bit, but come see us if it doesn't.
Are Pontiac Bonneville engine noises bad? Strange under-the-hood noises can point to problems within your Pontiac Bonneville engine. Knocking or tapping could be a symptom of low oil. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing can be traced back to a loose fan belt, and grinding could be a sign that something is wrong with your brakes — not the engine.
What could damage my Pontiac Bonneville engine? Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, revving your engine while the vehicle is in Park, or pushing 'the pedal to the metal' before the engine has warmed up. Steer clear of these habits to help protect engine performance and efficiency.
Can I use water in my Pontiac Bonneville radiator? Only in emergencies. A 50/50 mix of coolant and water (or a pre-mixed) coolant is recommended. However, if you must keep driving when you're out of coolant, it's better to drive with water in your coolant reservoir than nothing.
Why did my Bonneville engine suddenly stop? There are different reasons your Bonneville vehicle engine could suddenly stop. You may be looking at a lack of fuel, faulty sensors, issues with the ignition system, engine overheating, electrical problems, or mechanical troubles.
Who can repair my Pontiac Bonneville engine? Your local Firestone Complete Auto Care has you covered with expert Bonneville engine repair. Schedule an appointment today and see us at one of our thousands of locations.