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85 4runner down for the count, 22re, flagstaff, AZ
I had a front passenger side Tire blowout on the freeway back in September rip up the wiring harness and pull wires out of the fuse box. I have replaced the fuse box soldering all the wires back in. She turns over and is getting fuel but I'm not getting spark or 12v at the coil. The FSM refers to three wires going back to the ECU but I can of only find one of them. I have tried finding the problem a few times but no luck. Any thoughts or any flagstaff locals willing come join the wiring fun? I can provide crappy jokes, a six pack, and cash for your trouble. Thanks!
Last edited by calibretto; 01-04-2017 at 09:31 AM.
Reason: title
Thanks for the reply! I soldered everything back together and replaced the broken fuse box.
I think I found my issue today. It looks like all four of these wires in this wiring diagram that I have green boxes around connect where they need to go from the igniter. I'm having trouble figuring out where this black wire goes, however. It looks like a ground but its not showing continuity when I use a volt meter.
Is this black wire supposed to be a ground? This shows it goes back to the ECU, but I couldn't find a pin that it was connected to.
That makes sense, but I couldn't' get the volt meter to show continuity to the similar wire on my truck. Anywho, the sensor ground wire "E2" doesn't seem to be grounded. I may check that next. Although it doesn't appear to go to the engine bay at all, so it shouldn't' be damaged.
By process of elimination, it can only be the tach signal.
There are three plugs, one two place to the dizzy, one three place to the ECU, leaving a two place plug with coil power supply on one side and the tach output on the other.
By process of elimination, it can only be the tach signal.
There are three plugs, one two place to the dizzy, one three place to the ECU, leaving a two place plug with coil power supply on one side and the tach output on the other.
That's what I was thinking. I don't have the RE so no 3 place plug for the ECU. I do have the dist plug and an open plug for a tach.
Alright, thanks for the help! I went through and tested coil resistance and it seems to be a little high, 1.0, spec call for 0.5 - 0.7. Voltages for the coil and igniter seem to be good now. The last time I worked on it with my father he checked the voltages and said it was not getting 12 v....
I'm going to get a new coil and see if that helps.
Fuel pump's not turning on with jumpered wire, "IGN", "EFI" and "ENG" fuses are all good. There appears to be 12v at the efi main relay as well. I'm not getting 12v at the fuel pump check connector.
01-04-2017, 09:29 AM
