I have a 94 chevy s10 pickup. 6 months ago, I took it to the chevy garage and had them put plugs, wires, and rotor. she was fine until last week. now she is running rough and using a lot of gas. I don't have the money to take it back to the dealer ship. do you think it might be the plugs or the wires? how about emission hose coming lose?
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Take it to an Auto Zone and get a free computer read out.
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hsecln, unlikely that this is related to a service from 6 month ago. Unlikely also that it is the plugs etc. I'd check to see if you have spark on each cylinder. The rough idle and high gas consumption could be a bad coil, but could also be that you are having issues with your valves etc. It is also possible that your truck developed a fuel leak inside the intake manifold plenum. Commonly this is caused by a leaking fuel pressure regulator or fuel line. Remove the spark plugs and see what the faces look like. Those may tell you a bit more.
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