– 2006 –
 
– Auto & Repair –
• Engine backfires when you press on the gas pedal:

When you step on the gas the engine pops , spits and backfires. Sometimes it's loud or not so loud. This can cause severe engine damage and/or underhood fire.

Possible causes:

• Your camshaft timing belt or chain may have slipped: Replace timing belt or chain.

• Your ignition timing needs adjusting: Adjust ignition timing.

• There is a serious engine problem: You may have a burnt or broken valve, Worn or broken camshaft.

• Your spark plug wires are placed on the wrong spark plugs: Check firing order and place the wires on the correct spark plugs.

Engine makes a tapping noise when idling:

As the engine is idling, you hear a tapping noise coming from the engine. You don't notice the tap when you are moving or when you increase the speed of the engine. The problem seems to get worse (noisier) when the engine is warm. The tapping is also getting more noticeable every day.

Possible causes:

• Your valves need adjusting: Check and adjust valves.

• The engine is low on oil: Check oil level and fill as required.

• The engine's oil pressure is low: Check oil pressure. replace oil pump. (Generally not a DIY job)

• Hydraulic valve lifters bad: Replace valve lifters.

• Push rods bent or worn out: Replace push rods.

Popping noise from exhaust:

Whenever you press on the gas, you hear a popping from the exhaust. It may or may not be very loud and the engine seems to run okay. You may notice a drop in gas milage.

Possible causes:

• Muffler or exhaust pipe worn out: Replace muffler and/or pipes as required.

• Exhaust manifold cracked or broken: Replace exhaust manifold.
Engine makes a ticking noise:

As soon as you start the engine, you hear a ticking noise. It sounds like a pencil tapping. The speed of the noise increases with an increase in engine speed.

Possible causes:

• The valves need to be adjusted: Adjust valves.

• There is sludge in the engine which is restricting oil flow: Flush engine, replace oil filter and fill with new oil.

• Hydraulic valve lifters bad: Replace valve lifters.

• One or more of the engine's valves are stuck: Check valves and repair. (Generally not a DIY job)

• Push rods bent or worn out: Replace push rods.
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There is a rattling noise from the engine when you accelerate:

Your car runs well all the time. But when you press on the gas pedal to accelerate or to go up a hill, the engine rattles like the cylinders are full of marbles.

Possible causes:

• The ignition timing may be set wrong: Adjust ignition timing.

• The engine may be running too hot: Check and repair cooling system.

• There may be a vacuum leak: Check and replace vacuum lines as required.

• Incorrect grade of fuel: Fill with the correct, or higher, octane fuel.

• There is an excessive amount of carbon built up in your engine: Clean carbon from valves and combustion chamber. (Not a DIY job)

• There may be a fault in the computerized engine control system: Check engine control systems with a scan tool. Test circuits and repair or replace components as required. (Generally not a DIY job)
Squealing from engine while accelerating:

An irritating squeal is heard as you accelerate, turn a corner, or slow down. You may also notice that the noise is more frequent when the air conditioning is turned on.

Possible causes:

• The drive belts are slipping: Replace belts.

• The drive pulleys for some engine accessories are misaligned: Repair or replace bent pulleys. Check belt routings.

• You have turned the steering wheel to the limits: Normal.

• The drive belts are loose: Tighten belts.
 
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