Every thing was fine but when accelerated it went down instead boost up and some time engine shutdown

2000 DAEWOO MATIZ
115,000 MILES • 0.8L • 3 CYL • 2WD • MANUAL
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SUMRINA ZAFAR
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  • 2 POSTS
We overhauled engine, new piston and ring, new valve, new fuel pump, fuel injectors, new spark plugs.
When we started engine it was normal at start on idle.
Nov 25, 2019 at 10:14 PM
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STRAILER
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Hello,

It sounds like the exhaust system is clogged. To be sure here is a guide to help us confirm the issue:

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

Please run down this guide and report back.

Nov 27, 2019 at 2:46 PM
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SUMRINA ZAFAR
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Exhaust all okay. But decline of combustion still there.
Nov 29, 2019 at 10:14 AM
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STRAILER
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It sounds like the camshaft timing could be off a tooth. Lets do a compression test to see if the engine is okay. here is a guide:

https://www.2carpros.com/articles/how-to-test-engine-compression

Please run down this guide and report back.
Dec 1, 2019 at 1:25 PM