Once the truck warms up, it feels like it's missing or hesitates, this happens during idling, acceleration, and sometimes at 65 MPH. If it is in gear (automatic) it will miss, but if in neutral it doesn't miss. The engine lite is on, but the diagnosis says trans switch. The P/U has 210,000 miles, I have replaced spark plugs, wires, distributor cap , and roto. The P/U has been running very well.
SOURCE: nissan truck idles fine, does not acelerate well, and misses
Try to disconnect MAF sensor(mass air flow sensor) or MAP sensor (manifold absolute pressure) , I don't know which one you have , (suppose to have either one) , when engine running and see if it becomes any better , if it did , then it's your problem.
Just remember one thing , if your check engine light is off now , it will be on after you disconnect any above mentioned components.
Easy to reset , disconnect battery for 30 sec.
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