Recently bought a 96 sebring 2.5L w/ front end damage to rebuild for my gf to drive. The guy i bought it from had it sitting for nearly a year. When i went to pick it up it wouldnt start, he said it started for a few senconds then shut off and wouldnt start again. I assumed fuel filter from sitting and got a great price so i bought it.

Got it home and found the car to have no spark, took the distributor off and cleaned all the contacts and inspected, also cleaned battery terms etc. Still nothing. Searched on the forums and found out dist is $800 [:@], also found some info about the security system causing it to run for a few secs then shut off which is what he said it did.

I locked all the doors and unlocked w/ the key the security light went out but still no spark tried several times. I then checked the coil for power w/ a test light doesnt seem to have power to it when cranking.

Im going to try and get a service manual for this car today but can you guys inform me where to find the crank sensor on the 2.5L

any help is much appreciated

thanks

 

Hope this helps! Be sure to scroll all the way down.




Crankshaft Position Sensor
Chrysler Cirrus/Stratus/Sebring/Avenger/Breeze 1995-1998
































OPERATION
REMOVAL & INSTALLATION

TESTING

OPERATION
See Figures 1 through 5
The PCM determines what cylinder to fire from the crankshaft position sensor input and the camshaft position sensor input. On 4-cylinder engines, the second crankshaft counterweight has two sets of four timing reference notches, including a 60° signature notch. From the crankshaft position sensor input, the PCM determines engine speed and crankshaft angle (position). On 6-cylinder engines, this sensor is a Hall effect device that detects notches in the flexplate.

Fig. 1: Location of the crankshaft position sensor on 2.0L engines



Fig. 2: Location of the crankshaft position sensor on 2.4L engines



Fig. 3: Timing reference notches on 4-cylinder engines



Fig. 4: Location of the crankshaft position sensor on 2.5L engines



Fig. 5: Timing reference notches on 2.5L engines


The notches generate pulses from high to low in the crankshaft position sensor output voltage. When a metal portion of the notches line up with the crankshaft position sensor, the sensor output voltage goes low (less than 0.5 volts). When a notch aligns with the sensor, voltage goes high (5.0 volts). As a group of notches pass under the sensor, the output voltage switches from low (metal) to high (notch), then back to low.
If available, an oscilloscope can display the square wave patterns of each voltage pulse. From the width of the output voltage pulses, the PCM calculates engine speed. The width of the pulses represent the amount of time the output voltage stays high before switching back to low. The period of time the sensor output voltage stays high before switching back to low is referred to as pulse width. The faster the engine is operating, the smaller the pulse width on the oscilloscope.
On 4-cylinder engines, the crankshaft position sensor is mounted to the engine block behind the alternator, just above the oil filter. On 6-cylinder engines, the crankshaft position sensor is mounted on the transaxle housing, above the vehicle speed sensor.


TESTING
To test this sensor, you will need the use of an oscilloscope.
Visually check the connector, making sure it is attached properly and that all of the terminals are straight, tight and free of corrosion. Also inspect the notches in the crankshaft (4-cylinder) or flywheel (6-cylinder) for damage, and replace if necessary.
The output voltage of a properly operating crankshaft position sensor switches from high (5.0 volts) to low (0.3 volts). By connecting an oscilloscope to the sensor output circuit, you can view the square wave pattern produced by the voltage swing.


REMOVAL & INSTALLATION


4-Cylinder Engines
See Figures 1 and 2
[*]
Disconnect the negative battery cable. [*]
Detach the crankshaft position sensor electrical connector. [*]
Unfasten the sensor mounting screw, then remove the sensor from the vehicle. [/ol]
To install:
[*]
Install the sensor in the vehicle and secure with the retaining screw. Tighten the retaining screw to 105 inch lbs. (12 Nm). [*]
Attach the crankshaft position sensor electrical connector. [*]
Connect the negative battery cable. [/ol]
6-Cylinder Engines
See Figures 6
[*]
Disconnect the negative battery cable. [*]
If necessary for access, remove the speed control servo unit from the left side strut tower. [*]
Unfasten the sensor mounting screw, then pull the sensor straight up and out of the transaxle housing. [/ol]
The sensor connector may be attached to the heater tube bracket with a push-on clip. If so, pull the connector from the bracket to free it.
[*]
Detach the crankshaft position sensor electrical connector and remove it from the vehicle. [/ol]
To install:

Fig. 6: Crankshaft position sensor and spacer


The crankshaft position sensor should be adjustable, which is identifiable by the presence of an elongated mounting hole on the sensor itself. If the sensor removed is being re-installed, clean off the old paper spacer from the sensor face. A new spacer must be mounted on the face before installation. However, if a new crankshaft position sensor is being installed, confirm that a paper spacer is already present.
[*]
Install the sensor into the transaxle and push down until it contacts the flexplate. Hold the sensor in position and install the mounting screw. Tighten the sensor mounting screw to 105 inch lbs. (12 Nm). [*]
Attach the crankshaft position sensor's electrical connector. [*]
Attach the electrical connector to the heater tube bracket. [*]
If removed, install the speed control servo unit back into position and tighten the mounting nuts to 80 inch lbs. (9 Nm). [*]
Connect the negative battery cable. [/ol]

 

i actually found another sebring pretty cheap that was rusted out underneath and needed exhaust but ran good, bought it started swapping parts and sure enough it was the crank sensor.

It started right up idles great, however now when you give it gas ti wont rev past 2500-3k kinda boggles right around there even if to the floor. Check engine is on while idling and when you give it gas it goes otu around 2500 rpm, comes right back on when you let it go back to idle????

 

Your 3000 rpm limit may be caused by your O2 sensor(s) my '97 2.5L has 4, none of which were cheap. I have had this happen on other vehicles, but not my Sebring yet. It's a place to start.

 

Spark does seem to be a challenging thing for these cars!

As far as the crankshaft position sensor, look under the distributor (2.5L) (Driver's side) in the flywheel housing.In my 97 model you must remove the intake air duct, the battery, and the battery trays, then reach through the motor mount / battery stand bracket to reach it. A 10mm socket on a 3" extension, on a 1/4" drive ratchet was the trick. So you know, the plug clip for the sensor mounts with a push in type fitting. It comes with the new sensor. Be sure that the paper spacer (about 1/8" thick) is included in the box and attached to the sensor. This is the depth adjustment for installation.

Takes about an hour and ahalfstart to finish, and that includes cleaning up the battery! (Just replaced mine today!!!)