Jeep won't start.

[TBLimited]

Day before yesterday I bought a 88 wagoneer limited and brought it back and its having trouble starting. It will not start on its own power it will start however if starting fluid is sprayed into the intake. After getting it started it runs and idles perfectly. We replaced the plug wires, the coil, the distributor button, and checked and made sure it was getting spark by pulling a plug and looking at the spark as well as two of my friends stuck a screwdriver in the end of the plug wire and it shocked the $%@@ out of them. It is getting fuel we tested the pressure and with the key in the start position (not turning it over but just in the start position) it got 39 psi on the MPI. So its getting spark and its getting fuel. It will turn over and everything sounds normal it just won't fire up. It will start with starting fluid blown into the intake. It will idle fine but it will blow white smoke out first then it turns black. I belive the white smoke is just clearing out the starting fluid. When I turn it off and try to start it again it still won't fire it turns over fine but no fire. It only starts with starting fluid and not on its own power. I really appreciate all the help I just got this jeep and its driving me nuts that it won't run.

[Dukes69]

White smoke is water. If you have a blown head gasket, the water could be putting out the fire and causing it not to start. The starting fluid is so flamable that it will light it anyway. Black smoke usually means its running rich (too much gas). whats the compresson like? Try doing a leak down test.

[TBLimited]

Well I pulled the plugs and found them black with bad carbon build up. Would the leaking water cause the plugs to look like this? I thought that it was getting too much fuel hence the carbon build up I just don't know where to go from there.

[paulhead]

I think black carbon is oil getting into your cylinders, did you clean them of and try to start it?

[Cetrov]

The MPI fuel system employs a vacuum assisted pressure regulator. Fuel pressure should be approximately 55-69 kPa (8-10 psi) lower with the vacuum line attached to the regulator than with the vacuum line disconnected. System fuel should be 214 kPa (31 psi) with the vacuum line connected to the regulator and 269 kpi (39 psi) with the vacuum line disconnected

[Cetrov]

Models
1989 MJ & XJ Bodies

Subject
4.0L No-Start, Hard Restart, or Engine Die-Out. Vehicles Equipped With Automatic Transmission Only.

Index
DRIVEABILITY

Date
December 29, 1989

No.
18-57-89
(C18-23-9)
P-14
BODY CODE LEGEND

MJ - COMANCHE (RWD, 4WD) XJ - CHEROKEE/WAGONEER (RWD, 4WD)

SYMPTOM/CONDITION

Some 1989 vehicles equipped with the 4.0L engine and automatic transmission may experience an engine no-start, hard restart, or an engine die-out. This condition may be caused by low signal strength from the crank position sensor due to a larger than desired distance to the flywheel sensing ring.

DIAGNOSIS







Check to see if the vehicle has a slotted crank position sensor:

1. If the vehicle is equipped with a slotted crank position sensor (see Figure 1), check to see if the CPS grommet on the top of the transmission bell housing has been updated (see Figure 2). If the CPS grommet has not been updated, replace the CPS grommet per the Repair Procedure outlined below.


If the vehicle has a slotted crank position sensor and new CPS grommet, do not install a new sensor, but reinstall the slotted sensor that was on the vehicle and verify that it is good using procedures in the 1989 Jeep Service Manual 81-370-9045 on page 14-87.

2. If the vehicle does not have a slotted crank position sensor already installed, then proceed with the Repair Procedure.


PARTS REQUIRED

1 Crank Position Sensor (slotted) PN 83100067
1 Crank Position Sensor Grommet (dust cover) PN 83100068

REPAIR PROCEDURE

1. Turn the ignition switch to the "OFF" position.

2. Disconnect the Crank Position Sensor (CPS) from the engine harness.

3. Raise the vehicle using a lift.

4. Remove the old CPS and grommet.

5. Install the new CPS grommet.

NOTE :THE NEW CPS GROMMET MUST BE REPLACED SO THAT THE MAXIMUM SIGNAL OUTPUT CAN BE OBTAINED FROM THE NEW CRANK POSITION SENSOR.

6. Install the new Crank Position Sensor and loosely attach the retaining bolts.

7. Firmly press down on the slotted hole side of the CPS until it bottoms on the machined lip of the bellhousing. While holding the CPS down against the bellhousing, tighten the bolt on the slotted side of the CPS to 16 ft.lbs.

8. Tighten the remaining attaching bolt to 16 ft.lbs.

NOTE :MAKE CERTAIN THAT THE CRANK POSITION SENSOR IS COMPLETELY BOTTOMED ON THE MACHINED LIP OF THE BELLHOUSING AND IS AS CLOSE AS POSSIBLE TO THE FLYWHEEL SENSING RING WITHOUT CONTACTING IT.

9. Secure the lead of the CPS to the retaining clip on the bellhousing to prevent its contact with the exhaust manifold.

10. Lower the vehicle.

11. Connect the CPS to the engine harness.


POLICY: Reimbursable within the provisions of the warranty.

TIME ALLOWANCE:
Labor Operation No. 08-15-79-90 0.3 Hrs.

FAILURE CODE: 0X - Wrong Part

[Cetrov]

GENERAL INFORMATION
The combustion pressure leakage test provides an accurate means for determining engine condition. Combustion pressure leakage testing will detect:


Exhaust and intake valve leaks (improper seating).
Leaks between adjacent cylinders or into water jacket.
Any causes for combustion/compression pressure loss.
WARNING: DO NOT REMOVE THE RADIATOR CAP WITH THE SYSTEM HOT AND UNDER PRESSURE BECAUSE SERIOUS BURNS FROM COOLANT CAN OCCUR.

PROCEDURE


Check the coolant level and fill as required. DO NOT install the radiator cap.
Start and operate the engine until it attains normal operating temperature, then turn the engine OFF.
Remove the spark plugs.
Remove the oil filler cap.
Remove the air cleaner.
Calibrate the tester according to the manufacturer's instructions. The shop air source for testing should maintain 483 kPa (70 psi) minimum, 1379 kPa (200 psi) maximum and 552 kPa (80 psi) recommended.
Perform the test procedures on each cylinder according to the tester manufacturer's instructions. While testing, listen for pressurized air escaping through the throttle body, tailpipe and oil filler cap opening. Check for bubbles in the radiator coolant. All gauge pressure indications should be equal, with no more than 25% leakage. FOR EXAMPLE: At 552 kPa (80 psi) input pressure, a minimum of 414 kPa (60 psi) should be maintained in the cylinder.

[Cetrov]

1001 Ignition Line High
1002 Oxygen Sensor Heater Line Low
1004 Battery Voltage Low
1005 Sensor Ground Line Out of Limits
1013 Ignition Module (MPA) Line High
1014 Fuel Pump Line Low
1015 Fuel Pump Line High
1016 Charge Air Temperature Sensor Line Low
1017 Charge Air Temperature Sensor Line Low
1018 No Serial Data
1020 No SYNC Pulse Seen
1021 Engine Failed to Start Due to Mech., Fuel, or Ign.
1022 Start Line Low
1027 ECU Sees Wide Open Throttle
1028 ECU Does Not See Wide Open Throttle
1031 ECU Sees Closed Throttle
1032 ECU Does Not See Closed Throttle
1037 Throttle Position Sensor (TPS) Circuit Low
1038 Park/Neutral Line High (A/T)
1040 Latched B+ Line Low
1041 Latched B+ Line High
1042 No Latched B+ 1/2 Volt Drop
1044 Up-Shift Indicator Light Circuit (M/T)
1047 Wrong ECU
1048 M/T Vehicle Equipped With A/T ECU
1049 A/T Vehicle Equipped With M/T ECU
1050 Idle RPM Less Than 500
1051 Idle RPM Greater Than 2000
1052 MAP Sensor Out of Limits
1053 Change In MAP Sensor Reading Out of Limits
1054 Coolant Temperature Sensor Line Low
1055 Coolant Temperature Sensor Line High
1056 Inactive Coolant Temperature Sensor (CTS)
1057 Knock Sensor Circuit Shorted
1058 Knock Sensor Value Out of Limits
1059 A/C Request Line Low
1060 A/C Request Line High
1061 A/C Select Line Low
1062 A/C Select Line High
1063 A/C Clutch Line Low
1064 A/C Clutch Line High
1065 Oxygen Sensor Reads Rich
1066 Oxygen Sensor Reads Lean
1067 Latch Relay Line Low
1068 Latch Relay Line High
1069 No Tach
1072 ISA Motor Cannot Control Idle
1073 ECU Does Not See Speed Sensor Signal
1200 Defective ECU or Short to Voltage
1201 Injector Short to B+
1202 All Injectors Shorted to Ground
1203 to 1208 Injector (N) Shorted to Ground
1209 All Injectors Open
1210 to 1215 Injector (N) Circuit Open
1216 No Voltage at ECU From A/C Relay
1217 No Voltage at ECU From O2 Sensor Heater Relay
1218 No Voltage at ECU From Power Latch Relay
1219 No Voltage at ECU From Up-Shift Indicator Light
1220 No Voltage at ECU From EGR Solenoid
1222 Ignition Module (MPA) Not Grounded
1223 No ECU Tests Run

[paulhead]

Well there you go.