1994 Dodge Caravan 3.3L - Map Sensor Test good ... I think?
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1994 Dodge Caravan 3.3L - Map Sensor Test good ... I think?
I still am having a problem with a rough engine idle when the engine starts, enough it shakes the whole vehicle and vibrates the seats inside. When it doesnt blow the "Engine System" 15amp fuse blows.
So I found this great video on how to test the MAP sensor, which I think is on any vehicle.
http://www.youtube.com/watch?v=jyZBUbf7UNw
On the caravan the MAP sensor is behind the engine connected to the back of the intake manifold. Its between the manifold and the firewall. Its a black box with a female 3 pin connector on the passenger side. It also screws in and out, by rotating the entire MAP sensor.
I tested it by first confirming the voltage from the PCM was correct. With the key in the ON position but the engine not started, I got 4.88V DC on the middle pin on the connector and 5.00V DC on the left (or rear) pin on the connector. Then I re-connected the MAP sensor and used a safety pin to push into the connector to make a connection. The paper clips I found had too large of a diameter. I snipped the sharp point off the safety pin so not to penetrate the cable within the connector. I got 4.6V DC on the middle pin with the connector connected, and 5.00V DC on the left (or rear) connector when connected to the MAP sensor.
I think this means my MAP sensor is good and working as it should. Hopefully, this helps any others trying to test that MAP on the 3.3 or 3.8L engines.
So I found this great video on how to test the MAP sensor, which I think is on any vehicle.
http://www.youtube.com/watch?v=jyZBUbf7UNw
On the caravan the MAP sensor is behind the engine connected to the back of the intake manifold. Its between the manifold and the firewall. Its a black box with a female 3 pin connector on the passenger side. It also screws in and out, by rotating the entire MAP sensor.
I tested it by first confirming the voltage from the PCM was correct. With the key in the ON position but the engine not started, I got 4.88V DC on the middle pin on the connector and 5.00V DC on the left (or rear) pin on the connector. Then I re-connected the MAP sensor and used a safety pin to push into the connector to make a connection. The paper clips I found had too large of a diameter. I snipped the sharp point off the safety pin so not to penetrate the cable within the connector. I got 4.6V DC on the middle pin with the connector connected, and 5.00V DC on the left (or rear) connector when connected to the MAP sensor.
I think this means my MAP sensor is good and working as it should. Hopefully, this helps any others trying to test that MAP on the 3.3 or 3.8L engines.