Car revs up in park but hardly wants to move when I try to drive it.
Mar 30, 2019 at 9:12 AM
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SCGRANTURISMO
✓ASE Certified Mechanic
4,897 POSTS
Hello,
This could be a problem with your throttle body bore needing to be cleaned. Over the course of time your throttle body will get gunked up with black "tar" like substance. This is a natural occurrence from moving a lot of air. The sludge will interfere with the Throttle Position Sensor (TPS) signal. Without a proper signal from the TPS the Power-train Control Module (PCM) AKA, "computer" will not know how much air is entering the engine. The vehicle will go into "limp" mode because your vehicle will not want to go lean and do engine damage. I have included a couple of links down below for you to go to.
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.