- Joined
- Mar 23, 2025
- Messages
- 23
Hello, in a time cruch but I'll get yall up to speed. Fixing a 1994 Taurus SHO MTX, car uses a Low Data Rate ODB-I compliant EEC-IV computer with a waste-spark distributorless ignition. And she don't run. Sometimes get some detonation while trying to crank, sometimes at WOT I can get her going (like trash) for a few moments.
The architecture: car uses an electronic DIS module grounded thru the beautiful aluminum intake. Receives input from a crankshaft and single camshaft position sensors, I think they are HAL effect, at least one of them is. Sends signal directly to the coil pack. There is also something called a SPOUT connector that when disconnected, disables PCM input to control spark advance and dwell. without it, spark defaults to 10 degrees advance.
So here's where I'm at:
CKP is about a year old, Tach works
CPS is new, previous oil-soaked but still working sensor made no difference.
DIS module was triple-tested on a machine, verified ~.3ohm ground to chassis.
PCM reman installed ~2 years ago, show no other oddities in operation.
CCRM: ?. Fuel pump and fan work normal. Still no A/C tho.
COIL worked last year.
WIRES: Havn't done a test yet but I have a new set in storage
PLUGS: New Denso, forget the number but I think they are the actual OEM. The front three I pulled this morning were wet with fuel and mildly but evenly sooty, wiped right off. Gapped at .042, tested continuity from tip to tip, hard to get a steady probe my voltmeter showed between 3.7 and 4.8 kOhm.
The architecture: car uses an electronic DIS module grounded thru the beautiful aluminum intake. Receives input from a crankshaft and single camshaft position sensors, I think they are HAL effect, at least one of them is. Sends signal directly to the coil pack. There is also something called a SPOUT connector that when disconnected, disables PCM input to control spark advance and dwell. without it, spark defaults to 10 degrees advance.
So here's where I'm at:
CKP is about a year old, Tach works
CPS is new, previous oil-soaked but still working sensor made no difference.
DIS module was triple-tested on a machine, verified ~.3ohm ground to chassis.
PCM reman installed ~2 years ago, show no other oddities in operation.
CCRM: ?. Fuel pump and fan work normal. Still no A/C tho.
COIL worked last year.
WIRES: Havn't done a test yet but I have a new set in storage
PLUGS: New Denso, forget the number but I think they are the actual OEM. The front three I pulled this morning were wet with fuel and mildly but evenly sooty, wiped right off. Gapped at .042, tested continuity from tip to tip, hard to get a steady probe my voltmeter showed between 3.7 and 4.8 kOhm.