ridin_Z_alb Posted May 15, 2009 Share Posted May 15, 2009 I own a 77 and i am currently trying to wire up my l28et wiring harness from the 82 donor. I've looked at the swap threads, and i just can't figure it out. So here's the problem, I'm trying to use the stock efi to dash harness plug that my old efi originally used because of convince. After i had everything hooked up as the swap thread states i turned the ignition key and nothing. I've look at the ecu and the little green light isn't on or blinking. I went back and checked all my wiring to two different threads and a webpage about the swap (not youdamnfool) and now I'm more lost than ever. I've done everything according to the way it is specified (b/w coming of ignitor to 12+, black to ground, etc.) one thing i did not hook up was the fuel pump because i have it ran straight from the battery through a kill switch, could that be my problem? I think I might just not be getting any power does anyone what i should be looking for? Quote Link to comment Share on other sites More sharing options...
skib Posted May 15, 2009 Share Posted May 15, 2009 why not just hook the fuel pump up to the stock wiring? safer than a switch are you getting fuel, spark, ect? Quote Link to comment Share on other sites More sharing options...
ridin_Z_alb Posted May 16, 2009 Author Share Posted May 16, 2009 as far I know, the ecu isn't turning on correct me if I'm wrong but isn't that what the led is for? well along with some diagnostic codes. Quote Link to comment Share on other sites More sharing options...
Meshuganah Posted May 16, 2009 Share Posted May 16, 2009 Hello, It sounds like you have the supply for the computer hooked to a line which goes off whilst the engine is cranking. take a line from your battery + and connect it to the supply wire on the computer. If you have the big plug at the end of your harness, about 9 pins in a square arrangement, I think it is the big white wire. check it out. You can make a quick connect by hooking up to the high side of the coil, that will go back and power the computer too. Should run. The wire to your distributor will be blue (with a black return). Turn on the key and listen for the pump running. you should be able to hear it quite easily. Make sure your Throttle position sensor is plugged in properly and of course your inlet flapper too. There is little that will stop it from starting if you supply the power right. Good Luck. Quote Link to comment Share on other sites More sharing options...
ridin_Z_alb Posted May 16, 2009 Author Share Posted May 16, 2009 I fell absolutely ridiculous right about now. The brown and green wires powering the ecu were not getting juice. Now all i have to figure out is how to turn the idle speed down a notch or two (car came with a auto and swapped to five speed). any thoughts? Quote Link to comment Share on other sites More sharing options...
softopz Posted May 17, 2009 Share Posted May 17, 2009 there is a screw on the throttle body when your turn it wise it raises or lower the idle. Quote Link to comment Share on other sites More sharing options...
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