91 B2600 Intermittant Missing
My '91 B2600i 4X4 starts and runs great, but has an intermittant miss that comes and goes. Sometimes it will run fine for 2,3, 5 miles, then stumble and miss on and off for a mile or so, then run fine again. Have replaced coil, wires, cap, rotor, plugs, and fuel pump. It almost acts like a vapor lock kind of a problem, but it doesn't seem to need to warm up much before the problem starts. Driving me nuts (short drive!). Suggestions?
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I just bought a 93 b2600I and it does almost the same thing that you described. I have replaced same parts as you except for the fuel pump and my coil was good. Still have the same problem. If you find a cure please let me know! I will do the same. Thanks!
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Have you replaced your ECU?
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make sure your plug wires aren't touching metal, you might also check for any loose wires, alot of times intermittent problems are caused by a loose connection or a bare spot on a wire grounding out
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