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You may have a vacuum leak. Check to see if you need to replace the gasket between the intake manifold and the head. With the engine running, spray short bursts of starter fluid at points around the head/manifold gasket. If the engine starts running much better when you hit one of those spots you probably have a vacuum leak there. Be very careful with starter fluid. It is extremely flamable and if you don't use very short bursts you can cause a fire. If you don't have a vacuum leak, check to see if the injector(s) have anything in them.

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โˆ™ 2005-10-18 14:12:11
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Q: Why does your 1997 S 10 Idle rough now after you replaced the head with a new one?
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Related questions

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I blown head gasket can cause an engine miss which one cause a rough idle.

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Generally when the head gets replaced you would also want to replace your plugs as well. It can sometimes be a result from where the water has traveled into the oil from a bad head. I replaced mine with bosch platinum 2 and haven't regretted it for 2 years.

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