Power loss

2010 VOLKSWAGEN CADDY
150,000 MILES • 1.6L • 4 CYL • 2WD • MANUAL
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JACQUESHOMAN
  • MEMBER
  • 1 POST
When I start the engine the first rev is perfect.
When I keep it over 4,000 rpm's it start to lose power until under 4,000 rpm's.
When idle for about three to five minutes and you rev it up the first rev is good there after it just go bad again.
Apr 3, 2019 at 10:29 PM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,246 POSTS
Welcome to 2CarPros.

This could be a couple different things. What I suggest is to first check fuel pressure. If it is low, it will cause a power loss when there is a load on the engine or the RPM's are high. If the pressure is good, then I want you to check the catalytic converters to make sure they aren't partially plugged.
Here are two links. One discusses how to check fuel pressure and the other how to check a catalytic converter.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

Let me know what you find or if you have other questions.

Take care,
Joe
Apr 5, 2019 at 11:11 AM
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