89 engine swap in to86
05-14-2016, 07:20 PM
#61
OP, did you ever get the wiring diagrams? The CE panel on your car is going to be slightly different than the 89 harness. And by slightly I mean it's not going to work just plugging things in.
05-14-2016, 08:42 PM
#62
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05-22-2016, 06:51 PM
#63
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I have the wiring diagram and the harness is in but I have no voltage at pin 87 on the protection relay plug .the engine has spark and fuel pressure so I am stuck trying to figure out how to get voltage to the injectors ? .
05-23-2016, 02:06 PM
#69
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"WB" on the print = "W 13" actual pin.
Did you spritz some carb cleaner into the MAF to see if it would fire?
Did you spritz some carb cleaner into the MAF to see if it would fire?
05-24-2016, 02:46 AM
#72
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Terminal 87 of the IMS(Ign circuit control) comes from W13 of the central electric. This signal is generated when the LH relay(XXV) is closed(picked) term 85 by the signal from pin 21 of the LH through W21 connector going to ground to pull the relay solenoid.
the 'hot' side of the LH relay on pin 30 comes directly from the battery plus.
Now, for the 86 model of central electric board: Pin 30 from the LH is powered via U12 connector, direct to battery +, so that's fine.
terminal 86 goes direct to the 30 bus to provide 12V for the coil of the relay with key on, so that's fine.
Terminal 85(relay pick to ground) goes through W21 of the central elect board, to pin 21 of the LH much like the 89 system.
Diagnostics: Using your DVM, put the ground on any brown ground wire near the central electrics board. Put your red lead on the pin/wire at W21, set for 20VDC.
Turn the key to ON but not start. Check voltage reads ~+12VDC at W21 of the central electric board. This verifies the LH is basic functional.
With red lead on pin W21, turn key to CRANK start. Voltage on pin W21 should go to near ground, and thus pick the LH relay, XXV supplying 12VDC to the Ignition monitoring board.
If voltage on W21 goes to near ground with engine cranking, then check pin W23 of the 86 central electric board for 12VDC. If you have 12VDC at pin W23 of the 86 central electric, add a wire from W23 of the central electric to pin 87 of the IMS(Ign monitor board) to supply voltage to the injectors via the relays within the IMS board, to tie point 4 and tie point 1 of the injector wiring loom.
The 86 does not have tie point 4 and tie point 1, so if that doesn't power your injectors, you will need to find the loom for the injector which comes from the LH relay, and tie the output of the IMS to that wire bundle. The pulse for the injectors comes from pin 18 of the 89 LH and from pin 13 of the 86 harness. So, if you have the 89 harness, you should be getting the negative pulse on pin 18 to all the injectors when the LH is working.
the 'hot' side of the LH relay on pin 30 comes directly from the battery plus.
Now, for the 86 model of central electric board: Pin 30 from the LH is powered via U12 connector, direct to battery +, so that's fine.
terminal 86 goes direct to the 30 bus to provide 12V for the coil of the relay with key on, so that's fine.
Terminal 85(relay pick to ground) goes through W21 of the central elect board, to pin 21 of the LH much like the 89 system.
Diagnostics: Using your DVM, put the ground on any brown ground wire near the central electrics board. Put your red lead on the pin/wire at W21, set for 20VDC.
Turn the key to ON but not start. Check voltage reads ~+12VDC at W21 of the central electric board. This verifies the LH is basic functional.
With red lead on pin W21, turn key to CRANK start. Voltage on pin W21 should go to near ground, and thus pick the LH relay, XXV supplying 12VDC to the Ignition monitoring board.
If voltage on W21 goes to near ground with engine cranking, then check pin W23 of the 86 central electric board for 12VDC. If you have 12VDC at pin W23 of the 86 central electric, add a wire from W23 of the central electric to pin 87 of the IMS(Ign monitor board) to supply voltage to the injectors via the relays within the IMS board, to tie point 4 and tie point 1 of the injector wiring loom.
The 86 does not have tie point 4 and tie point 1, so if that doesn't power your injectors, you will need to find the loom for the injector which comes from the LH relay, and tie the output of the IMS to that wire bundle. The pulse for the injectors comes from pin 18 of the 89 LH and from pin 13 of the 86 harness. So, if you have the 89 harness, you should be getting the negative pulse on pin 18 to all the injectors when the LH is working.
05-24-2016, 03:35 PM
#75
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Keep the battery fully charged for the following tests.
Swap LH relay XXV with starter relay XIV and try to crank the engine.
If the engine will crank, relay is good. Then recheck pin W23 for 12V while cranking.
If no 12V at W23, remove LH relay. With key off, check relay XXV(LH) socket on cent elec board slot 30 for 12V.
If no 12V at socket slot 30 of XXV relay, go back to pin U12 and check for 12V.
If no 12V at U12, check wiring from battery to pin U12 of cent elec board.
If you have 12V at socket slot 30 of XXV, then turn key to ON but not start, check socket slot 85 for 12V.
Report back findings.
Swap LH relay XXV with starter relay XIV and try to crank the engine.
If the engine will crank, relay is good. Then recheck pin W23 for 12V while cranking.
If no 12V at W23, remove LH relay. With key off, check relay XXV(LH) socket on cent elec board slot 30 for 12V.
If no 12V at socket slot 30 of XXV relay, go back to pin U12 and check for 12V.
If no 12V at U12, check wiring from battery to pin U12 of cent elec board.
If you have 12V at socket slot 30 of XXV, then turn key to ON but not start, check socket slot 85 for 12V.
Report back findings.