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Discussion Starter · #1 ·
Last night out of the blue my engine started to make a really loud "sucking" noise like the car is trying to suck in more air. It only happens when I accelerate the engine. What do you think?
 

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They are all FI engines. What kind of 5.7 L engine is it? It could be a number of things. Did you check for any loose parts under the hood? For example the top/front of the airbox depending on 5.7 L which engine you have.
 

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Discussion Starter · #4 ·
I disassembled the air box to look for obvious. Could not find anything. It's a 1993 Caprice Classic. Not sure what motor it has.
 

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If it is indeed a 350 (VIN 7) it's an L05 350.
 
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