Why does my car accelerate itself and then rev itself when I press the clutch pedal in?
After I resealed the engine and put it back in my 1992 Honda Prelude, it now will often rev itself to 2000 rpm while I'm driving and continue doing so until I accelerate a bit further, and then I'll hear a pop and it will drive as normal again.
But then, when I kick the clutch in to disengage, the engine revs up to 2000 rpm again.
If the clutch is engaged, the car will of course drive itself. This woud be nice if the car would also brake itself and steer itself, and then park itself and then go pick up the groceries while I just stay home and occupy myself by typing obnoxious remarks on Twitter, but unfortunately I haven't got that $19.95 performance chip off Ebay for doing all these functions, which leaves me with this dangerous Roboprelude.
Could it be:
1. Throttle Position Sensor (TPS)
2. Manifold Absolute Pressure Sensor (MAP)
3. Fast Idle Thermo Valve
4. Idle Control Valve
5. Vacuum leak in a coolant hose?
Important note: It will consistently go into this automatic driving mode anytime I'm going uphill on a slight incline, as if it's responding to being under load.
I should mentions same thing happened 6 months ago after I also took the engine in and out to replace the clutch. Back then, I took it to a BP mechanic and he said the MAP sensor was "not connected properly" and also charged me for a throttle body service.
And yes, he had fixed it, but I had never disconnected the MAP sensor in the first place, and I'd done a thorough throttle body service before
It sounds like your throttle is out of adjustment
If its equipt with a desel-diaphram my guess would say its got a hole in it
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