85 XT EA82T fuel/electrical issues

[torxxx]

Ok, my boss decided take in an 85 XT EA82T that some guy tried to rebuild an engine on. After fixing all the junk he had hooked up backwards, or installed wrong I've got it back to where it should run (timing belts on wrong, disty stabbed wrong, coil wires left loose) just to name a few things. I'm not getting fuel pressure at the filter.

 

I 100% hate EA82T's, I've owned a few of them long enough to realize they were not worth building. My biggest issue is I've never owned an XT turbo. Mine was an RX and a 90 loyale turbo wagon. The wiring is completely different on this XT, so I have no clue where the fuel pump relay is, and if it uses a fuel pump modulator like the EJ cars do.

 

Where do I need to start looking/testing to get voltage to the fuel pump? Fuseable links are good, fuses are good no fuel pump hum when you turn the key to on. No fuel on cranking either. I tested the hot wire @ the pump and nothing.

 

With the ECU in the trunk, I could only find the green test connector. No where back there did I see the white read connector.

 

Codes with the Green test unplugged were #12 and #14. IIRC 12= starter circuit and 14 = abormal fuel injector output (assuming it popped that code because the injectors arent getting fuel and opening. Correct me if I'm wrong, but doesnt the crank angle sensor in the disty tell the injectors to fire? or does it send a reference pulse to the ECU and then the ECU powers the injectors on and off?

 

 

Only thing out of the ordinary that I noticed was pulling off the fuel line off the fuel rail was that there was gas in there, under pressure. sprayed me in the face when I pulled the hose off.

 

If anyone has any links to a early EA82T FSM, I'd really appreciate it. Thanks guys

[john in KY]

The ECU completes the fuel pump circuit by providing the ground. Easiest way to check the pump is to just hotwire it. Will either work or not. The relay I think is behind the radio. I once had an 85 XT turbo and the injectors won't sometime fire. Turned out there is a ground wire connected to one of the intake manifold bolts, right side of engine. In my case the bolt was so corroded, it didn't always make the ground. Good chance this wire is missing or just not connected. You pull trouble codes with the green connector connected, not disconnected.

[torxxx]

ty john for clearing that up for me. I'm too used to N/A engines. I keep looking for the white read connector LOL.

 

I spent my 6 hours on it today, got most of the stuff the guy messed up fixed, ran a hot wire to the pump so its got pressure to the rail now. Just no injector pulse..

 

I called the customer up, told him to come get it. told him it was an open circuit between the ECU and the injectors. He can mess with it, I dont have the time to tear up the interior and dig into the injector wiring that rots on the harness under the passenger seat. Didnt charge him for the time/parts I had to put on it just to get it in the correct order. I just want the thing off our property.

 

Oh and the owner split the block because it blew white smoke out the tail pipe. I didnt have the heart to tell him that he wasted his time putting rings in it. just couldnt bring myself to tell him that he cracked the heads. Also when he put the block back together he stripped out 2 of the sealing bolts on the block. Makes me wonder if he lined up all 3 notches on the rings in a straight line :-p

[natext6]

Poor xt

[turbosubarubrat]

I 100% hate EA82T's

 

my dads the same way with the ea82 turbo's but he doesn't really want anything with major computer stuff anyway:rolleyes:i also dont blame u this one guy had 2 gl-10 wagons both different years and they took the motors out of them and where going to swap them it was stupid how they didn't notice how both had different setup like the electrical and vacume systems, and we got talking to him and he said u can't buy the ea82t heads new anymore thats why he was swapping because he cracked a head on one (u can buy the ea71, ea81, ea82 still though:D)