trphinney
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- Oct 7, 2009
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The tuboswap website "Stinger Performance" was helful to some point. Now that the mill is installed, and ready for testing, I am needing some real tech assist, as the ECU swap / wiring does not seem to be as simple as they made it seem. They told me to gladly replace the '86 ranger (5-spd manual) ecu w/ the '88 t-bird LA3 ECU. Next came part of the needed t-bird harness. Here, I pulled wires from the ECU plug in the Ranger to make way for wires that were used in the t-bird wiring (a 4 pin VAM plug, the 6 pin plug that feeds the injectors / intake, and 2 others that all went to the SPECIFIC pins they came off of when i was taking them out of the tbird. Install complete, ready for testing. No fuel pump noise when i turn the key on. The local tech helped me find (having oem pin diagrams for both of the vehicles / ECUs), that No. 5 pin on the ranger may need to tie in to #37 and #57 (both vehicle power) in the new wiring, as the new wiring didn't include a no.#5 Key power (red). Still no fuel pump noise, now to find that the 2 or 3 red wires, and it seemed like about every wire (about 8 in the main wrap) in the new harness show they are grounded (w/ the ohmmeter). I ck the plug at the high psi fuel pump, and both the pink and blk wires show direct ground (one should be hot). I pull the plug apart and apply and apply 12V and the pumps run, seems like they should shut off when at pressure, but they continue to run, so I pull my feed wire off. Time to go to my other job - where do I start tomorrow. Seems like the box is throwing out neg. signals that it shouldn't be.
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