by maddog on April 5th, 2007

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I am working on a 1998 350 vortec engine. It is only firing on 4 cylinders out of the 8. I have replaced the intake and the throttle body and the spark plugs any other suggestions as to what it may be%3

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by anonymous on April 5th, 2007
Check you ignition coils and make sure they are firing. You can test this by removing the coil that works and hooking it up to the cylinders that are not firing
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I am working on a 1998 350 vortec engine. It is only firing on 4 cylinders out of the 8. I have replaced the intake and the throttle body and the spark plugs any other suggestions as to what it may be%3

Answers. 1 helpful answer below.

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I am working on a 1998 350 vortec engine. It is only firing on 4 cylinders out of the 8. I have replaced the intake and the throttle body and the spark plugs any other suggestions as to what it may be%3

Answers. 1 helpful answer below.

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