What causes a Harley to misfire?
Air leaks at the air cleaner or intake manifold can cause “lean misfire” as a result of air/fuel mixture being too lean. Damaged exhaust or intake valve(s). A bent or broken intake or exhaust valve will cause a Harley-Davidson engine to have a misfire. It can also trigger a popping sound in the intake.
Why does my Harley spit and sputter?
There are several reasons why a motorcycle sputters. The most common reasons are carburetor issues such as a vacuum leak, fuel leak, or tuning issues. Other culprits could include corroded or cracked spark plugs or spark plug wires, a faulty ignition coil, a clogged air filter, or engine timing issues.
How do I know if my Harley is running rich?
– Black, dry, fluffy colored plugs — indicate that the engine is running too rich or excessively idling. Black smoke coming from the exhaust is another sign of a rich air/fuel mixture.
What causes loss of power in Volkswagen TDI?
There is NO signal to the driver, just this odd feeling. It feels like you have the E-brake on, or something is holding you back. On a flat road, it will be subtle; it is much more obvious when trying to climb or get onto a highway. Your engine light may or may not be on.
What causes a bad MAF on a VW?
If the engine check light is on, it may reset when the connector is disconnected and reconnected. One cause of a bad MAF is that you have used an aftermarket air cleaner that fails to keep oil residue away from it. Even a little residue will cause the sensor to fail. They are sensitive. The time to change a MAF is not longer than 30 min.
What causes a vacuum leak in a Volkswagen?
Vacuum leaks are known to cause it because the car may stumble or buck. However, the problem might be a boost issue, EGR, exhaust leak, clogged fuel pump, bad MAF sensor, or sticking vanes in the turbo from soot.
Why does my VW go into limp mode?
You may be in limp mode for some reason. If you turn off the engine for 10-20 seconds, limp mode goes away, but as you drive again, it happens again. There must be a code about why limp mode is being triggered. The VW dealers have a much more thorough computer to obtain the codes. I have had 3-4 times this odd sensation of loosing boost power.