When do you need to do an engine diagnostic?
Conducting an engine diagnostic when your vehicle’s self-diagnostic system apparently isn’t detecting any problems can be difficult. But you still can diagnose engine performance and driveability problems like… …if you know what are the components or systems most likely to cause these common issues.
Can a GM HEI system cause an engine to stall?
Take, for example, a GM HEI system with a faulty ignition module that has a fixed dwell instead of the proper expanding dwell period. Depending on where the dwell is locked, the engine may experience any or all of the following: rough idle, stalling, lack of power, detonation and hesitation.
What are some common mistakes in car diagnostics?
Another common mistake in diagnostics is falsely condemning a part that is really just out of adjustment. The carburetor and distributor are the primary recipients of this treatment, with some mechanics providing advice like, “If it doesn’t run right, change the carburetor.
What’s the difference between wrenching and diagnosing engine problems?
In comparison to wrenching, diagnosing requires a more in-depth knowledge of the workings of an engine. A mechanically inclined person can easily change a part and do a good job of it, but it takes a higher level of study to be able to accurately determine which part needs to be changed.
Conducting an engine diagnostic when your vehicle’s self-diagnostic system apparently isn’t detecting any problems can be difficult. But you still can diagnose engine performance and driveability problems like… …if you know what are the components or systems most likely to cause these common issues.
When does an engine stop running for no reason?
III. My Engine Stalls Sometimes an engine may die for no apparent reason. The conditions under which it stalls can give you some clues about where the potential problem may be located. For example, the engine may stop running during idle or deceleration.
What should I do if I have a problem with my engine?
When a problem occurs, try to get a handle on whether it is ignition- or fuel-related. Make the mixture richer and leaner. Add and delete ignition advance. If you find the engine responds to a richer mixture, then you will probably be looking for a vacuum leak or weak ignition.
What should you know about a car diagnostic test?
Diagnostic tests can reveal problems within a car’s engine, transmission, exhaust system, brakes, and other major components, as well as performance issues with the fuel injector, air flow and coolant, ignition coils, and throttle. However, a common misconception about car diagnostic tests is…
III. My Engine Stalls Sometimes an engine may die for no apparent reason. The conditions under which it stalls can give you some clues about where the potential problem may be located. For example, the engine may stop running during idle or deceleration.
When a problem occurs, try to get a handle on whether it is ignition- or fuel-related. Make the mixture richer and leaner. Add and delete ignition advance. If you find the engine responds to a richer mixture, then you will probably be looking for a vacuum leak or weak ignition.
What are the different types of engine problems?
This installment of the Lost Art series will provide a common-sense approach to determining the cause of engine problems. The condition There are seven main categories of performance issues. They are rough idle, stalling, lack of power, pinging/detonation, excessive oil consumption, exhaust smoke and hesitation.
How is DTCs used to diagnose car problems?
Since 1982, the On-Board Diagnostic (OBD) system has helped automotive technicians monitor and find problems with emission components or control systems that may have gone out of their normal operating parameters. A car’s computer uses DTCs to pinpoint a potential system’s fault.
Where can I find the diagnostic trouble code?
Scan your codes and follow the chart to determine what the code means. Some parts stores will scan your codes for free. Autozone is one place that will give you the code number. If you don’t find the information you need here, simply Ask your Car Questionfor FREE. SEARCH TROUBLE CODES Engine Sensors- What you need to know and more