This tutorial will help you do a ‘Dry’ and ‘Wet’ engine compression test on your 2.3L Ford Ranger or Ford Mustang (or 2.3L Mazda B2300).
This tutorial will help you troubleshoot 2 different conditions:
There are two different types of compression tests that I'm gonna' show you, one's called a ‘Dry’ compression test and the other is called a ‘Wet’ compression test.
Both of these test will help you determine the health of the engine. The ‘Wet’ compression test will help you further pinpoint a low compression test result to either worn cylinder head valves or worn piston rings.
OK, to make it as easy as possible to navigate this article, here are its contents at a quick glance:
You can find this tutorial in Spanish here: Cómo Verificar la Compresión del Motor (2.3L Ford) (en: autotecnico-online.com).
The most obvious symptom, that you're gonna' feel, when one or several cylinders have low compression is a Rough Idle Condition.
Although it doesn't happen all of the time, but if your 2.3L Ford Vehicle is OBD II equipped (1996+), you're gonna' see Misfire Codes stored in the PCM's memory:
no compression in all of the cylinders will result in a Cranks but Does not Start Condition. The symptoms you'll see will be:
The most important tool that you're gonna' need is a compression tester. You can either rent this bad boy from your local Auto Parts Store (Auto Zone, O'reilly, Advanced Auto Parts, etc.), or you can buy one online.
Since the spark plugs need to be removed, you'll need some of the following basic tools:
In case you're needing to buy a compression tester and want to save money by buying it online.. you can shop here: