Quote:
Originally Posted by el phantasmo
Thanks rf, good info. I found an explanation for the slightly different pin outs. Inside a C3 ECM D1 and D2 are solder connected and A11 and A12 are solder connected, so when the ground wires attached to the block all these pins are connected. I found a pic at
http://www.justih.org/Binder-Bench/s...7668#post27668
I also thought of a couple more questions. All of my senors came w/ my harness and I am not sure if it was a 5.0 or a 5.7. How can I tell if they will work the 5.7 ecm 1227747 AMUR? I am going to order some 3/8" aluminum tubing from summit for my return line. What is the best way to connect it to the rubber line and keep it from slipping?
250cows I am no expert so you might want to get verification from some of these other guys, but on my schematic: tan/blk-A7(TCC or shift light), purple-brake/stop light switch, and blue-c7(High Gear) Good luck with your project. It sounds cool! |
ECM D1 is a ground (blk-wht) ckt-450
ECM D2 is a sensor return ( blk) ckt-452 which is the same as ground.
ECM A11 is a sensor return (purpl) ckt-445
ECM A12 is a ground (blk-wht)
Binder board is another good resource for TBI conversions. I'll have to pop cover on one of my ECMs to take a look.
Most of the sensors used for TBI engines are the same except for knock sensor which might be different depending on the engine displacement and cam shaft type. There are variations on TPS style, and IAC is different between BBC and SBC. All sensors have GM or Delco part (basic) numbers:
Manifold Absolute Pressure (MAP) 16137039 (should have green or black connector insert)
Throttle Position Sensor (TPS) 12116257 (depends on the TB shaft style!)
Coolant Temperature Sensor (CTS) 25036979
Engine Spark Control Module (ESC) 16128261
Idle Air Control Valve (IAC) TB dependent - see above
Engine Spark Control Module (ESC) 16128261 (use earlier CCC version with non roller engines or if you have a very loud exhaust system)
etc
To keep rubber hose from slipping from 3/8" tubing I use beading tool from SkyGeek. Alternatively, Earls sells ID specific beading tool. Use search I think I posted part number earlier in this thread.
700R4 typically has three wires:
LT-Blue - 4th gear indication switch (pulls to ground when in 4th gear)
PPL - Brake switch (NC) to TCC solenoid
Tan-blk - ECM A7 TCC solenoid enable (typically pulls to ground to enable TCC)
//RF