How to do a compression test on a Ford 4.9L engine?
How to do a compression test on a Ford 4.9L engine? In this tutorial, I'm gonna' show you the ‘ins and outs’ of doing a compression test on your Ford 4.9L engine (inline 6 cylinder), 5.0L engine, or 5.8L engine. More importantly, I'll show you how to interpret your compression test results. What happens when you have low engine compression? If you have low engine compression one or several cylinders, this will cause an engine miss when the engine is idling or accelerating your Ford down the road. What should I do if my Ford 5.0L won't start? Warm Up...