eaglescout526

Ok so I'm sitting here watching the X-files again and in S1E10 theres an MJ with a camper shell parked in the motel parking lot. That one isn't recorded in the link above.

Hmmm. Something is funky with the wiring and I'm not sure what. Would an 86 have two of those five pin connectors by the relay center?

My block has a standard hex head. That’s why I find it odd. We will get this figured out. Know of any rodents that could’ve gotten in?

Oh ok I see what you’re saying now. Soldering them at the crimps will help. Nope none enter my mind unless changing where the sensors ground at but I’m sure somebody else would speak before telling you to change the ground for the sensors. Odd that you have a torx bolt for the dipstick.

I have no idea what the soldering would do. Probably would make it more challenging to replace the rings if they disintegrate.

here's a couple tests from the book Injector resistance is too high, Ohmmeter should indicate less than 10 Ohms. ECU is not switching the injector. Remove injector harness connector. Connect a test lamp to the connector. Engage starter the starter motor. The lamp should pulse dimly. These are the only tests I found for the injector.

Could be. You have verified that the pump does indeed work correct? Theres a few possible causes for engine not starting but most aren't the issue. But it seems fuel related as you said the engine fires when given fuel. But still that MAP circuit is concerning.

Huh interesting. So the MAP circuit and the fuel pump are affected. Hmmm let me see what the diag chart says.

Yes and if you did it right and according to the book O.L. indicates defective ground. Ok this is good, meaning the ECU isn't being fried by backfed 12V. So we can say there definitely is some sort of ground or wiring problem. So I know from goofing around the engine won't run without the MAP or the CPS(obviously the CPS). Theres something funky going on and you upgraded and cleaned the grounds per Cruisers tips. Did you by chance get the ground from the post to the alt bracket I believe? I know on my 88 the ground goes from the post to the alt bracket. And you have confirmed spark too right? Just engine won't run.

Yeah not like the 4.0L when I pulled an ECU for another member Lets do the last step and see what Ohm testing T17 and T2 gets. I want to ask, what kind of shape is the engine harness in in it entirety?

See if you can back probe the ECU connector. If you can I would plug the ECU back in and do some back probing. Oh wait never mind its a giant plastic plug that can't be back probed if I remember correctly.

That's fine, it will help for better grounding. Thinking to myself, you won't have the C101 cause its an 86 so no tar to clean out. Getting O.L. Ok I'm going to type verbatim what the books says. MAP Sensor test: Inspect the MAP sensor vacuum hose connections at the throttle body and sensor. Repair as necessary Test the MAP sensor output voltage at the MAP sensor connector terminal B(as marked on the sensor body) with the ignition on and the engine off Output voltage should be 4 - 5 volts. Note: The voltage should drop to 1.5 - 2.1 volts with a hot, neutral idle speed condition(not applicable cause you can't get the engine to run) Test ECU T33 for the same voltage described above to verify wire harness condition. Repair as necessary. Test the MAP sensor supply voltage at the sensor connector terminal C with the ignition ON. The voltage should be 5 volts(+or- 0.5V) Five volts should also be at T16 of the ECU wire harness connector. Repair or replace the wire harness as necessary. Test the ECU with diag tester MS-1700 if necessary.(Wish we could find one) Test the MAP sensor ground circuit at sensor connector terminal A and ECU connector T17. Repair the wire harness if necessary. Test the MAP sensor ground circuit at the ECU connector between T17 and T2 with an ohmmeter. If the Ohmmeter indicates an open circuit inspect for defective sensor ground connection on the flywheel/drive plate housing(bell house) near the starter. So the dipstick ground is what this is for us. Book covers three engines with the same TBI set up. If the ground connection is good, replace the ECU. If T17 has a short circuit to 12 volts correct this condition before replacing the ECU. So there's a little bit of resistance after all.

Youre doing it right. I just wanted to make sure that you have been testing with key on. I'm not sure how much of a diff the ECU unplugged or plugged in makes but it could help rule the ECU out. How does the dipstick ground look on the block? Clean and shiny? Most if not all the sensors ground out at that grounding point. Just for giggles ohm test the ground post to the engine ground strap on the fire wall and see if it will say O.L. I will admit it can be tricky to get good contact while back probing the connectors.

VDC DCV still DC voltage. Hmmm. This is interesting then. Try A to the Neg battery post and see what Ohms we get. We shouldn't get an open loop between A and T17 but we should be getting something at C+T16. Now we do have the key on engine off when testing right?

And you're using VDC right? Test Grounds by using Ohms, we don't need to see voltage on ground circuits just resistance and open circuits. Buuuuuuttttt if we see voltage on any of the grounds then we have a problem.

Ok lets recap MAP sensor A-Ground B-Output voltage C 5 Volts. Since the ECU is a computer and all computers love 5V systems, the sensor should get 5V Terminal 16 is MAP supply voltage Terminal 17 is MAP ground. So you tested the ground to the supply voltage, which means you got a reading but not the right reading we are looking for. Try A and T17 Then try C and T16 and see what comes up.

I'm willing to bet it is factory paint job but the bumper and caps were probably done to match at some point. Looking at the rear in the top pic looks like they didn't paint the rear bumper caps.

Well, I was about to give you a hard time for cutting up a good bed mat but I see it is already cut up for the tool box so I guess youre off the hook. But that is all rather smart way to put in a roll bar with the bed mat.

Good luck finding a suitable cap for that bottle. Its ironic how crown makes that bottle but no cap to go with it. I found that the old 5 quart oil bottles worked as a cap. I know there was some NOS caps left but I don't know where now.

Geez, I would expect $100 for the gold one not the basic factory workers coin.

I want to do an idiot light cluster as a decoration piece with power. It would be pretty cool use of a worthless cluster.

Check your grounds and the fuel pump and its associated relay? Now when you say you have spark is your CPS outputting the correct voltage?

Blue box is for headlight on buzzer and black box does not have it.

No, should be exactly the same length.

The only thing different between the two AX’s is the addition of a fifth gear. It should be a direct plug and play swap. But if his is an 86 it might have the external set up in which case you will have to swap the front bearing retainers as one has a metal sleeve that goes over the input shaft while the internal slaves do not.