1990 Dodge Other Repair Question
Can you help me with my 1988 chrysler 360 F/I engine?
scan for codes first
code 26 came up with no engine light.said open circuit
try this to see if it brings up anything...
NS10 FUEL PRESSURE CHECK
1. ConneDRB II to engine harness connector. Connect Fuel Pressure Gauge (C 3292 ) in fuel supply hose at throttle body. Put system in Diagnostic Test Mode. Press and hold ATM key on DRB II.
NOTE: Fuel system may be under pressure. Bleed pressure from system as needed before removing filter, pump, hoses, etc...
2. If fuel pressure gauge is reading 13.5 15.5 psi (.95 1.08 kg/cm2 ), go to next step. If fuel pressure is not within specifications, go to step 4).
3. Enter Sensor Test "05". If display on DRB II is reading between .5 1.5 volts, go to NS11. If display is reading more than 1.5 volts, replace throttle position sensor.
4. Put system in Diagnostic Test Mode. Press and hold ATM key on DRB II. If fuel pump is running, check all fuel lines for kinks, restrictions and leaks. Check for plugged in line or in tank fuel filters. Pump may
operate, but drive pin may be sheared. If the fuel pump is not operating, go to next step.
5. With system still in Diagnostic Test Mode, raise vehicle on hoist. Disconnect in tank fuel pump connector. Connect voltmeter to Dark Green/Black wire. Press and hold ATM key. If voltmeter reading is battery
voltage, Dark Green/Black wire is okay, go to next step. If voltmeter reading is zero, repair open in Dark Green/Black wire.
Fig. 14: Connecting Voltmeter to In Tank Fuel Pump Connector
6. Connect an ohmmeter between Green/Yellow wire and vehicle ground. If ohmmeter shows continuity, replace in tank fuel pump. If there is no continuity, repair open in Green/Yellow wire.
NS11 CHECKING FUEL INJECTOR DRIVER CKTS (Z1 & Y11)
1. Connect DRB II to engine harness connector. Put system in Diagnostic Test Mode. Disconnect fuel injector connector. Connect analog voltmeter to Dark Green/Black and White wire terminals in injector harness
connector. Select lowest voltage scale available on voltmeter (4 volt scale is recommended). Put sytem in ATM Test "02".
2. If voltmeter reading is not pulsating, go to step 3). If voltmeter reading is pulsating between zero and one volt, go to step 5). If voltmeter is showing negative voltage, reverse leads at injector connector and repeat
3. Connect voltmeter to injector harness connector Dark Green/Black wire and ground. If voltmeter reads battery voltage, go to next step. If voltmeter reading is zero volts, repair Dark Green/Black wire of injector
harness connector for an open circuit to wiring harness splice.
Fig. 16: Connecting Voltmeter To Fuel Injector Connector
4. Turn ignition OFF. Disconnect 14 pin connector from SMEC. Connect ohmmeter to 14 pin connector cavity No. 9 and white wire of injector harness connector. See Fig. 17 . If there is no continuity, repair
White wire to 14 pin connector cavity No. 9 for an open circuit to injector connector. If there is continuity, replace SMEC for a defective power board. Before replacing SMEC, ensure terminal in 14 pin
connector cavity No. 9 is not damaged causing a poor connection.
Fig. 17: SMEC 14 Pin Connector Terminal Identification
5. Reconnect fuel injector connector. Remove screw and lift cap from injector. Connect analog voltmeter between terminals of injector cap. Select lowest scale available on voltmeter (4 volt scale is recommended).
Put system in ATM Test "02".
6. If voltmeter reading is pulsating between zero and one volt, replace fuel injector. Before replacing injector, ensure terminals in injector cap are not damaged causing a poor connection. If voltmeter is showing a poor connection.
7. ensure cap and harness are making good connection.
thanks so much.Now I have another problem.I am getting no spark .Is the spark also in that 14 pin connector.I decide to try and clean the 14 pin connector and now in order for the fuel pump to energize.I have to giggle it arround.i think I spead out the pins.I would like to also know what the other harness connector that connects to the ECM does? You know the one with the I think 60 pins?I also tried to clean that.Does that harness have anything to do with spark(I hope not).Thanks so much and please respond.Tom
if the pins dont' make good connection nothing will work. make sure all your pins aren't bent from you trying to clean them. Otherwise i'd suggest you take this to a pro who can go through step by step to fix it.
Thanks again. At least I'm back to square one.I did get it started.I went and messed with the pins again..My battery was also weak so I gave it a jump and it started . The original injector problem is still there. I don't have access to a drbII.can I use a snap on.I used it already to read codes.That's how I came up with code 26. One more thing.Before I knew the Rv would not start, I managed to put a fuel pressure gauge on the throttle body.when I turned the key, the pressure gauge read 11 lbs. Was that normal? Thanks again for your excellent detailed information
ya that is normal