achim_richter7

Express Cylinder Pressure Fluctuation

Hi, I have a 2010 Chevrolet Express with a diesel engine. Recently, I've noticed some cylinder pressure fluctuation. Symptoms include higher fuel consumption, reduced engine power, and the check engine light keeps popping on. I've scanned for codes, but it points to a consequential error rather than the root cause. Any ideas?

A 2010 Chevrolet Express with a diesel engine is experiencing cylinder pressure fluctuation, leading to higher fuel consumption, reduced engine power, and a persistent check engine light. The issue may stem from a faulty turbocharger, which can cause related problems. However, after professional diagnostics, the root cause was identified as a minor sensor issue, which was resolved without cost.

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4 comment(s)

I also drive an Express, though I'm not sure the exact year. I recall experiencing similar issues some time ago. Have you checked the turbocharger? A faulty turbo can cause a cascade of problems that might manifest as cylinder pressure issues, leading to higher fuel consumption and loss of power.

Interesting, I hadn't considered the turbo directly. When you had the issue, did the engine sound different? I'm trying to rule out anything major like engine knocking or problems with the crankshaft or camshaft before diving into the turbo.

Yes, I did notice a slight change in the engine's sound, though it was subtle. Given your mileage, a thorough inspection by a qualified mechanic is advisable. It could be something as simple as a fuel injector issue, but professional diagnostics are key to pinpointing the problem without unnecessary expenses.

Thanks for the insight. I took it to the shop, and it turned out to be a minor sensor issue causing the fluctuation, as you anticipated. The repair cost was 0€. Your suggestion to consider consequential errors was spot on.

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CHEVROLET

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EXPRESS