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HomePerformance Issues

Performance Issues

Performance issues include:

  • Rough idling
  • Poor acceleration
  • Misfires
  • Reduced power
  • Stalling
  • Bad fuel economy
  • Strange noises

And often signals problems with the:

  • Air/fuel delivery (dirty filters, clogged injectors, bad sensors)
  • Ignition (spark plugs, coils, timing)
  • Internal wear (low compression, carbon buildup)

Choose Your Danny’s Engineportal Help Topic Below

Engine Damage – Look For Deterioration, Before It’s Too Late
Engine Damage

Engine Damage – Look For Deterioration, Before It’s Too Late

02/06/2026
It’s not always easy to recognize, when your vehicle is suffering from possible engine damage. Many symptoms can be overlooked and seen as “normal.” engine damage While not all symptoms may threaten the life of […]
Vacuum Test Basics - What To Check And How To Do It
Engine Testing

Vacuum Test Basics – What To Check And How To Do It

08/15/2025
First, doing a vacuum test, can tell you more about your engine, than you think. And, it is one of the easiest and least expensive ways, to check an engine for serious issues. So, engine […]
Spark Plug Health The Key to Optimal Engine Performance
Ignition Systems

Spark Plug Health Is Directly Linked, To Your Engines Performance

12/30/2024
Spark plug health, on today’s engines is very important, and if ignored, can cause serious problems. So, it stands to reason that, weak or bad spark plugs, are a big cause of concern. Spark plug health […]
Doing a Engine Power Balance Test
Engine Testing

Engine Power Balance Testing: Total Power Output Of The Engine

09/17/2024
The engine power balance test, can be a great way to pinpoint, a cylinder that is underperforming. Above all, a cylinder that is not working as well as, the other cylinders in the engine. The […]
Feeling Rough Engine Idle On Steering Wheel
Poor Performance

Rough Engine Idle: Common Causes, With Possible Solutions

09/11/2024
Are you having a rough engine idle, possibly rising and falling (RPM), or difficulty maintaining a steady rate of rotation? If you are, that is not a normal operating condition. And, there can be a […]
Reducing Your Fuel Cost
Poor Performance

Reducing Fuel Cost Is Easy: If You Can Follow A Few Rules

08/18/2024
Reducing fuel cost, is actually quite easy, if you can follow a short list of rules. So, doing one thing differently may not show, any rewards in the beginning. But, as you keep adding the […]
Low Fuel Level on Fuel Gauge
Poor Performance

Poor Fuel Economy: Common Causes, And How To Combat Them

08/17/2024
Maintenance is critical in keeping your car running its best, and reducing poor fuel economy. So, how do you combat poor fuel economy. The only way is to follow the recommendations, pointed out, in this […]
Display of Dash Warning Lights and Symbols
Engine Problems

Engine Issues – Early Warning Signs – Major Causes Explained

07/17/2024
So, one minute your engine is running fine. Then, the next, you’re sitting on the side of the road, wondering what happened. Consequently, diagnosing engine issues, is not always easy. And, can be even harder […]
Motorcycle Spring Tune Up Tips - How to stay safe on the road.
Repair Tips

Motorcycle Spring Tune Up Tips – How To Stay Safe On The Road

04/06/2024
In light of the ensuing motorcycle season, I wanted to bring you some motorcycle spring tune up tips. Above all, before you hit the open road. I know it is still early, But, as the […]
Idle Air Control Valve (IAC) Mounted on Engine
Engine Testing

Idle Air Control Valve (IAC), Function, Failure Symptoms – Testing

03/31/2024
SO, THE IDLE AIR CONTROL VALVE, IS RESPONSIBLE FOR MANAGING THE ENGINES IDLE SPEED. And, that’s what makes the idle air control valve, a major management component of the engine. Because, it decreases or increases […]
Running ( Dynamic ) Compression Test - How To Do It And Why
Engine Testing

Running Dynamic Compression Test: Evaluating Individual Cylinders

03/03/2024
Firstly, a running dynamic compression test, confirms how effective each cylinder is, at pulling air in. Secondly, holding it for the correct amount of time, then letting it go, into the exhaust. So, if a […]

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