Wednesday, 8 April 2015

Engine Cranks Excessively Before Starting

Cranks Excessively Before Starting

Car Starting Issues

Helpful Information
The definition of extended engine crank time is, when the ignition key is turned to the crank position, the engine takes longer than usual before it will start running. (Extended crank time.) When an engine is cranked over it should fire up in about a three second time period. If a starter is weak it can cause the engine to crank slower than usual, which causes the engine to build compression slowly. This can be caused by a weak battery or starter motor with no malfunction of the engine.
Best Practices
  • Regular engine tunes up's and fuel filter replacement can stem hard starting conditions.
  • To prevent engine cylinder low compression change motor oil and filter at recommended intervals.

Step by step instructions on how to repair an automotive engine that cranks excessively before starting. This article pertains to all cars.
Difficulty Scale: 4 of 10
Tools and Supplies Needed
  • Flashlight
  • Fuel pressure gauge
  • Wrench set
  • Screwdriver set
  • Protective eyewear and gloves

Before repairs begin, park the car on level ground ,in park with the emergency brake set.

Automotive Engine
 Step 1 - For an automotive engine to start and run correctly the engine tune up must be kept up to date.

New Spark Plug
Step 2 - For an engine to start up when cranked over the fuel system must be quickly pressurized. Not only does the fuel pump need sufficient pressure at start up, it needs to be able to hold pressure for a short amount of time while the engine is off.  Perform a fuel pressure and regulator test using a fuel pressure gauge. Its also a good idea to remove the fuel filter to check for blockage.

Fuel Pressure Test Gauge
Step 3 - An engine depends on vacuum to allow the engine to start up and run properly, if there are leaks in the vacuum lines the engine will have an extended crank time before starting. Inspect the engine's vacuum lines and repair broken or dilapidated lines.

Vacuum Line
Step 4 - At the air intake port of the engine known as the throttle control motor or throttle bore, mass volumes of air leave deposits called choking. These impurities pass through engine despite the air filter and build up over time. Servicing this unit as part of a regular tune up is necessary for proper operation.

Throttle Actuator Cut-Away

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