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rough idle
I have a '93 and have experience this also. Here's what I've noticed: The idle is smooth when the engine is cold. I also notice the volt meter sitting on about 13.99 volts. However, when it heats up, the volts meter drops and the rough idle gets worse. I wonder if this is an charging problem because the volt meter bounces when I turn on my blinker or witpers. I have also replaced the cap, rotor, plugs, & coil, but you mentioned the EGR. Where is this because I don't find one on my truck?
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