93 Fox , T56 magnum, A9L with Tweecer RT
Car was an original AOD with C3W EEC (I still have C3W EEC). Swap was preformed by previous owner with T56 and A9L. I purchased the car and was fighting idle surge problems when cold and when restarting. Reviewed idle surge checklist - Checked voltages at MAF, TPS, IAC and replaced IAC and TPS, base idle reset,replaced all vacuum hoses. KOEO codes 15, 85, 67 and 66c. Eliminated 15 with check sum base set to 0 with Tweecer. 85 due to no purge installed, 67 is NSS so I started chasing this code. Still have 67 code with clutch in while running test. 66 may be due to car surging badly and low voltage as it almost dies (will diagnose further after I get it running again)
I could get the car idling well after battery disconnect, drive around for a while (20-30 min) with no issues. Restart minutes later and idle surge returns like there is no memory.
I have been researching many threads and I believe that I have narrowed down some issues.
I am getting 13v at pin 46. A9L disconnected (key on, crank, clutch in/out)
Car had a Auto O2 harness so I re-pinned the loop from NDS pin 30 to Manual on the black connector. (also tried NDS to auto with same result).
Car had a auto trans harness so I removed and installed a new manual trans harness with all 8 wires. T56 will only accept VSS and passenger side 4 wire plug from factory manual trans harness. plug or unpluged - have 13v at pin 46
black and gray clutch switches are installed at assembly. plugged, unplugged, and looped NSS with fuse - all still 13v at pin 46.
Car has push button start under dash (previous owner wired directly to ignition in engine compartment) key does not start car. (possible concern?)
disconnected all 46 connections per wiring diagrams, trans, NSS, clutch switch, tps, O2 harness, Baro, intake temp N/A, EGR N/A, engine coolant sensor N/A - checked pin 46 volts at each disconnect and with all disconnected - Still have 13v at pin 46
Removed pin 30 at EEC harness and grounded at chassis - Still have 13v at pin 46
I inspected the A9L and do not see any signs of burnt connections. Not sure how this did not originally fry the A9L as the car was running for years with auto harnesses (O2 and Trans). Most say that this will burn the EEC.
Any ideas on why I am still getting 13V at pin 46? Thank you for your help.
Car was an original AOD with C3W EEC (I still have C3W EEC). Swap was preformed by previous owner with T56 and A9L. I purchased the car and was fighting idle surge problems when cold and when restarting. Reviewed idle surge checklist - Checked voltages at MAF, TPS, IAC and replaced IAC and TPS, base idle reset,replaced all vacuum hoses. KOEO codes 15, 85, 67 and 66c. Eliminated 15 with check sum base set to 0 with Tweecer. 85 due to no purge installed, 67 is NSS so I started chasing this code. Still have 67 code with clutch in while running test. 66 may be due to car surging badly and low voltage as it almost dies (will diagnose further after I get it running again)
I could get the car idling well after battery disconnect, drive around for a while (20-30 min) with no issues. Restart minutes later and idle surge returns like there is no memory.
I have been researching many threads and I believe that I have narrowed down some issues.
I am getting 13v at pin 46. A9L disconnected (key on, crank, clutch in/out)
Car had a Auto O2 harness so I re-pinned the loop from NDS pin 30 to Manual on the black connector. (also tried NDS to auto with same result).
Car had a auto trans harness so I removed and installed a new manual trans harness with all 8 wires. T56 will only accept VSS and passenger side 4 wire plug from factory manual trans harness. plug or unpluged - have 13v at pin 46
black and gray clutch switches are installed at assembly. plugged, unplugged, and looped NSS with fuse - all still 13v at pin 46.
Car has push button start under dash (previous owner wired directly to ignition in engine compartment) key does not start car. (possible concern?)
disconnected all 46 connections per wiring diagrams, trans, NSS, clutch switch, tps, O2 harness, Baro, intake temp N/A, EGR N/A, engine coolant sensor N/A - checked pin 46 volts at each disconnect and with all disconnected - Still have 13v at pin 46
Removed pin 30 at EEC harness and grounded at chassis - Still have 13v at pin 46
I inspected the A9L and do not see any signs of burnt connections. Not sure how this did not originally fry the A9L as the car was running for years with auto harnesses (O2 and Trans). Most say that this will burn the EEC.
Any ideas on why I am still getting 13V at pin 46? Thank you for your help.