Where is the intake pressure sensor located on the Baojun 730?
3 Answers
The intake pressure sensor on the Baojun 730 is located on the intake manifold, positioned at the top to prevent water accumulation. Introduction to the intake pressure sensor: The intake pressure sensor, abbreviated as MAP, connects to the intake manifold via a vacuum tube. It senses vacuum changes within the intake manifold as engine speed and load vary, converting these changes into voltage signals through internal resistance adjustments. These signals are then used by the ECU to adjust fuel injection and ignition timing. Systems used in fuel-injected engines: In fuel-injected engines, the system that uses an intake pressure sensor to measure intake air volume is called the D-type injection system (speed-density type). Unlike mass airflow sensors that directly measure intake volume, the intake pressure sensor employs indirect detection, which is influenced by various factors. Consequently, its inspection and maintenance differ from those of mass airflow sensors, and the faults it generates are unique.
I've been repairing the Baojun 730 for many years. The intake pressure sensor is located above the engine's intake manifold. Specifically, after opening the hood and facing the engine, it's on the left side near the firewall area, right next to the throttle body. This small sensor measures intake pressure to help the ECU adjust fuel injection. If it malfunctions, the car may experience unstable idling or jerky acceleration. Locating it is easy: follow the intake pipe, and you'll see a black square attached to it with an electrical connector. When inspecting it yourself, first disconnect the negative battery terminal to avoid short circuits. Unplug the connector and use a multimeter to test the resistance—normal readings should be close to the standard value. Carbon buildup or dust blockage often causes issues, so regularly cleaning the air filter and engine bay can prevent problems. When installing a new one, align it properly to avoid tilting, and tighten the screws to prevent vibration-induced detachment. Keep it fixed in place; don't move it around randomly.
Last time my 730 had issues, it was due to a faulty intake pressure sensor located on the intake manifold in the engine bay. Opening the hood revealed it right in the center. At that time, the car was shaking and consuming more fuel. I checked forums and learned the sensor was heavily dust-clogged—cleaning it restored performance. The location is easy to find: follow the air filter box toward the engine, and you’ll spot a small black box attached to a metal pipe. Remember to disconnect the battery before unplugging it. Since then, I’ve made it a habit to inspect its position quarterly, ensuring secure connections. The spot is prone to dirt or oil stains—just wipe the terminals with a dry cloth. Replacement is low-cost; DIY takes about an hour. Its condition greatly impacts daily driving, so address abnormalities promptly to avoid roadside breakdowns. Keeping the sensor clean is key preventive maintenance.
