Recent content by IowaEngineer

I know it's a long shot, but would anyone happen to know or be able to test to see what that resistor should have been? It got so hot the ink burned off, and it's obviously too far gone to test. It's either R625 or R635 (board is also a bit scorched, so hard to make out) on the layout.

Looks like we have a winner. Edit: I have not chased it upstream yet, but that blown resistor goes to pin 16 on E4 (EGR). I dont see a conflict on the wiring diagram where a fault on EGR would take out the injector circuit. TWS and IGT are the resistors on either side of it, but neither of...

89661-60090. I have no reason to believe that the PO ever touched the ECU.

I'm at a loss and really don't have any more rational ideas to try. I put the scope on all three of the distributor coil pickup lines at the ECU and could see reasonably clean square waves of varying freqeuncies on all of them when I cranked the engine over. As a shot in the dark I swapped the...

I pulled the fuse panel back out to double check. This installer did not tap the IGN wire, but I also made sure it stil had 12v at the ECU. Also made sure that I had 12v on E4 pin 2 while cranking. Is it possible that a bad ECU ground could manifest like this? Maybe the low side drivers in the...

My garage has been unbearably hot over the last week with the heat wave we've been having, so my progress has slowed down. I also took a detour to rip out that alarm system I found when accessing the ECU. I don't think it was necessarily related to any of my issues, but it obviously was not...

Thanks Jon, but I cant seem to open that PDF with any of the viewers I tried. I do have print outs of most of the relevant pages from the WD085U wiring diagrams of the ECU and under dash electronics. I have not yet been able to find any sort of logic diagram for what signals and states the ECU...

I think you want these for the set of 3 hoses. I ordered them from mcgeorge a few weeks back. Cost about $60: 16571-61140 Upper Hose 16572-61030 Lower Hose 16573-61060 Lower Hose partsouq

I verified that I have 12v on both sides of injector 1. I also verified that with the battery removed and the ignition switch to on, I have continuity from the pos battery clamp through both the white/blue and yellow wires (A12, A25/ No10, No20) at the connector to the ECU. My Fluke 289 couldnt...

Really apreciate the help Jon. Point noted on the injectors. They were bought more because I was impatient than because I was chasing more power. I'll get the OEMs sent off for a rebuild soon. I did verify that the fuel rail was clear of obstructions when I had it off to swap the injectors...

It was the reputation of the 3FE's reliability that had me take the chance. To be honest if I'd know the sludge disaster that was under the valve cover, I might have though a bit more before taking the plunge. I can't blame the PO because he obviously had not had it apart so I doubt he knew...

I do have CEL. I also went through the full chain of fusable link -> circuit opening relay back when I was initially diagnosing the dead fuel pump. Everything electrically appeared to be operating as expected. I also would think that I've elimated the VAF as a likely cause based on no change in...

Thanks for the hint on the VAF. Just to ensure that I am not losing something in the acronym. Does VAF refer to the airflow sensor? If so, I checked based on the FSM and all resistance measurements were within specifications. Would there be another indication of a fault that I should look for?

I found a project 1991 FJ80 that was local and at a good enough price that I picked it up. The PO had purchased it as a project for him and his son to work on with the intent to use it for light offroading, but it seems that they only made it as far as buying new wheels and tires before the son...