Hope this finds you all well.
What I have is a ’93 5.0 stroked to 347. It’s in a 1993 Volvo 940 wagon. Tuned a few years ago by the engine builder at his Sears Point shop.
It passed CA smog checks without too much sweat. The last few weeks I've been occupied doing some engine compartment clean-up. Removing most of the old production line connectors and cleaning up the vacuum hoses. It is still EEC-IV.
After everything was back together, before initial start up I clipped in my Innova EEC-IV Ford code reader.
KOEO: I get a 15 (EEC (PCM) Read Only Memory (ROM) test failed)
then a 54 (Intake Air charge temperature sensor circuit open)
The amazing thing is code 11 shows up after the second group finishes.
Check engine light is ON
The ECU is an X3Z.
I ran a new wire from the ACT sensor (also new) to pin 25. VREF is 5.05 vdc
Temp: 60F Sensor voltage is 4.76 vdc Resistance across sensor terminals is 42.6 K ohms. Both readouts appear to be in range.
Two new Motorcraft O2 sensors installed.
I drove the car yesterday. Seemed to run ok. CK Engine Light on the whole time…
Not sure to how to determine if the ACT sensor data is being seen by the ECU considering the last code seen is a 11
.
If anyone can think of anything else I might try…
Best regards all...
jeff
What I have is a ’93 5.0 stroked to 347. It’s in a 1993 Volvo 940 wagon. Tuned a few years ago by the engine builder at his Sears Point shop.
It passed CA smog checks without too much sweat. The last few weeks I've been occupied doing some engine compartment clean-up. Removing most of the old production line connectors and cleaning up the vacuum hoses. It is still EEC-IV.
After everything was back together, before initial start up I clipped in my Innova EEC-IV Ford code reader.
KOEO: I get a 15 (EEC (PCM) Read Only Memory (ROM) test failed)
then a 54 (Intake Air charge temperature sensor circuit open)
The amazing thing is code 11 shows up after the second group finishes.
Check engine light is ON
The ECU is an X3Z.
I ran a new wire from the ACT sensor (also new) to pin 25. VREF is 5.05 vdc
Temp: 60F Sensor voltage is 4.76 vdc Resistance across sensor terminals is 42.6 K ohms. Both readouts appear to be in range.
Two new Motorcraft O2 sensors installed.
I drove the car yesterday. Seemed to run ok. CK Engine Light on the whole time…
Not sure to how to determine if the ACT sensor data is being seen by the ECU considering the last code seen is a 11
.
If anyone can think of anything else I might try…
Best regards all...
jeff