Question about Chevrolet 2500

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I have a 1999 Chevy ck2500 four wheel drive five speed with a 454. I have replaced plugs and wires and recently fixed all the exaust leaks. The truck has a hard time starting inless its been five minutes since I shut it off. I have to crank it three time about five sec per crank to get it to start. Once started it runs like it has a cam, but then tightens up once all the fuel is burned off. Its eather getting to much gas or not enough gas when starting. It runs fine, but every now and then when I get on the gas it chugs and acts like I got a heavy load. I know my way around engines and I have tried everything I can think off. I was thinking o2 sensor, but my truck doesn't have any lights on.

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Hi,Yea that's kinda weird,could be the fuel pump check valve.is going bad inside the pump. its supposed to keep fuel from draining out of fuel lines back into tank ( thats why it will crank easyer if it does not sit to long) but after sitting overnight,ect. its letting the fuel drain out of the fuel lines and you have to crank it that many times to get fuel back to engine. just an idea! good luck. yz-maniac.

Posted on Oct 13, 2010

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