98:accord surges after driving for awhile, no error codes.After playing with gas pedal it takes off like its been boosted.Have any ideas
Automatic? I assume....as this could be what the problem is. Your transmission may not be shifting correctly. Check your transmission fluid level in park, engine at operating temp and idling. E brake on. There are many reasons a car will surge, but problems while driving will most likely be tranny related. You may want to flush it, and change the filter. Also check your throttle cables. There are two if you include the cruise control. Make sure there not stretched or broken. Hope I helped a little. Should state mileage, model, trans, mods, recent repairs. The more detailed your question is, the better the answer you will receive.
Idle air control valve is dirty or fast idle thermo valve is not working correct idle air control is behind the air Pentium fast thermo is below throttle body 
SOURCE: 98 accord dies while driving for no apparent reason
It could be a number of things. These include: faulty coil wire, bad alternator, bad torque converter, bad computer, the ignition relay is giving out, a dirty and stuck idle control valve. It should be one of these problems. How to tell which one it is is to follow a systematic approach and test each indiviaul item/circuit.
SOURCE: I have a 1994 Honda Accord 4 door v6. I have rough
SOURCE: My 98 Honda Accord Vtec 4cyl. eng is starting
Seems like the coolant temperature sensor is giving the computer erroneous readings, and it is not adjusting the fuel mixture properly for cold engine operations. You should have the check engine light on, indicating this malfunction. The idle fluctuations are normal. The engine is trying to die, from the improper cold mixture, and the computer (ECM), recognizing low idle speed, is sending it back up. Another possibilty is that the butterfly on the throttle body is not closing completely, to allow richer mixture needed for cold starts.
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