Mar 27, 2011 · Testing the engine compression on your 4.3L or 5.0L or 5.7L GM equipped vehicle is not hard. In this article, I'll guide you every step of the way and I'll also show you how to …

Nov 27, 2021 · It’s been a long time since I did a compression test on any engine. From my understanding based on experience and recent research, I need to ensure the engine is …

Jun 26, 2001 · I'm still troubleshooting a "water in oil" problem with my 1989 OMC Cobra 5.7L engine and just started checking the cylinder compression. The manual says 155psi and was …

Dec 28, 2025 · Symptoms of low engine compression can be, an illuminated (CEL) and the engine running rough or misfiring. Also, the engine failing to start, despite turning over quickly.

Apr 24, 2025 · Explore common Chevy 5.7 Vortec engine problems, their symptoms, and consequences to stay informed and avoid costly repairs. Hidden engine problems and …

Apr 1, 2025 · You can use a compression tester or a leak-down tester to find out which cylinder has low compression and where the leak is coming from. Then, you can fix it yourself or take …

Mar 8, 2023 · If there’s low engine compression, you’ll start to notice performance issues, which is why it’s imperative to fix them immediately. In this guide, we cover the top causes of low …

However, Chevy and GMC vehicles equipped with this engine are commonly plagued with fuel pressure regulator issues. Leveraging my experience as a mechanic, I will discuss the …

Chevy truck blown head gasket, low compression, or cracked heads diagnosis. This is the best way to compression test an engine. I remove all the spark plugs first.

For a 1989 5.7 TBI, the fuel pressure should range from 9 to 13 PSI, so that is what you should check using a fuel pressure gauge. If the pressure is low, even with a new pump and filter, it's …