8 Symptoms of Engine Trouble


At the first sign of an engine issue, you'll want to get to the shop for diagnostics. If you wait, the problem could worsen to the point that you need a rebuild or replacement. Here are eight signs of engine trouble.

Power Loss

If your engine suddenly loses a significant amount of power, then there's cause for serious concern. This could mean that you're dealing with worn-out pistons.

Knocking Noise

A repetitive knocking sound may arise due to poor lubrication/low oil. Knocking might also occur when air-fuel mixture ignites on its own instead of via a spark plug, which can lead to serious trouble.


Vibrations could arise from your engine if dangerously low oil is causing metal-on-metal contact.

Check Engine Light Illuminates

When the check engine light turns on, it doesn't automatically mean that your engine is on the verge of failure. But it's still best to get to the shop for diagnostics so that any emerging problems can hopefully be nipped in the bud.

Engine Stalls while Idling

This problem often indicates that there is a fuel delivery problem. If you stall in traffic, you could be put in a dangerous situation, so it's important that this issue is addressed as soon as possible.

Burning Odor

Burning oil could lead to insufficient lubrication. As a result, moving parts could seize up.

Discolored/Excessive Exhaust Smoke

You've got a sign of trouble if you're noticing too much exhaust smoke or if the smoke is off in color. Blue-tinted smoke suggests that oil is leaking. White smoke is a sign of an internal coolant leak. Black smoke could indicate that too much fuel is being burned.


It's important to always keep your cooling system in great shape so that you minimize the risk of overheating, which could cause engine failure. Oftentimes, overheating is due to cooling system leaks.

If your engine has failed and you need a replacement, it's worth considering installing an expertly rebuilt engine. For engine replacement in Mesa, Tempe, Gilbert, Peoria, and Phoenix, AZ, contact the experts at Discount Engines at (480) 351-6068. Feel free to give Discount Engines a call today to ask about our current inventory of affordable used engines in Phoenix!

Discount Engines Blog
Posted: January 29, 2021

Written and Published By MORBiZ

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