HELP: Latest '85 into '83 debacles - Page 2 - PeachParts Mercedes-Benz Forum

GlennCraven · #16 07-07-2006, 04:17 PM

And here's a couple of shots of the fuel leaks. ... I'm thinking it's the rubber hoses and not the brass (or whatever they are) lines or fittings. ... Opinions?

DeliveryValve · #17 07-07-2006, 11:40 PM

Quote:

Originally Posted by GlennCraven

Here's my wiring pictures.

No. 1 has the green wire I found that I think might should go to the temp gauge sensor, plus a brown wire with green stripe that is also cut and unattached.

No. 2 is what I believe matches the earlier photo that was posted for me to compare; the (purple-circled) temp gauge sensor on my car.

No. 3 shows two other loose wires that I don't know where they go.

Thoughts on any or all of the above?

GrennCraven,

Since I am following your footsteps (but actually doing to swap myself). I think I can identify some of the pics that you have questions on post #15. Plus my ’83’s engine is still complete in the car while the ‘84 engine is sitting in my garage and I can use them to compare them to your questions.

1)Yes those wires lead to the Temp sensor in the head right between/beneath the second and third fuel injector and the other end leads to the temp gauge

2)If it is located between the second and third fuel injector then it is your temp sensor for the gauges. If it is located between/beneath the first and second fuel injectors then it is the coolant sensor for the 1985’s control unit. See link to the diagram and look for number 83.

3)The round connector leads from the fuel rack position sensor to the 1985’s control unit. Again see the link for the diagram and see number 64.

BTW – are you using the 1985’s injector pump or the ‘83s?

http://www.peterschmid.com/vacuum/19.../1984_1985.jpg

As for the rectangle connector in the pic. I think that looks like the connector for your A/C compressor. Does your A/C work?

Now to answer post #16, your return lines are leaking. If they are old and have been disturbed (removed and reinstalled) – they will leak. So buy new return lines and replace them. That should fix that problem.

I hope this helps.

DeliveryValve · #18 07-07-2006, 11:45 PM

I didn't realize the link didn't work.

Here is the working link.

http://www.peterschmid.com/vacuum/1977_1985/617_95/1984_1985.jpg

Again look at numbers 83 for the coolant sensor and and 64 for the fuel rack position sensor on the injector pump.

Hope that helps.

GlennCraven · #19 07-08-2006, 03:13 PM

[quote]
1)Yes those wires lead to the Temp sensor in the head right between/beneath the second and third fuel injector and the other end leads to the temp gauge

Quote:

So just the green wire is? What's the brown and green? ... I presume I'll need to get a length of wire and a connector cap now to get this reconnected.

Quote:

2)If it is located between the second and third fuel injector then it is your temp sensor for the gauges. If it is located between/beneath the first and second fuel injectors then it is the coolant sensor for the 1985’s control unit. See link to the diagram and look for number 83.

It's certainly shaped like No. 83 in the diagram you posted. It's hard to say where it's located. I wouldn't say it is "between/beneath the first and second injectors," nor is it really "between the second and third" injectors, though it's probably closer to being the latter than the former. ... By my memory it's almost directly below No. 2 injector.

Quote:

3)The round connector leads from the fuel rack position sensor to the 1985’s control unit. Again see the link for the diagram and see number 64.

BTW – are you using the 1985’s injector pump or the ‘83s?

We're using the '85 injector pump, which supposedly had electric switches for emissions stuff that was vacuum-actuated on the '83. This I presume is one of the wires left disconnected by the mechanic because he had nowhere to attach it on the '83 chassis/electric system. ... Err, what's the fuel rack position sensor do?

Quote:

As for the rectangle connector in the pic. I think that looks like the connector for your A/C compressor. Does your A/C work?

I think you're right, and no, it doesn't.

Thanks for the advice!

Now to answer post #16, your return lines are leaking. If they are old and have been disturbed (removed and reinstalled) – they will leak. So buy new return lines and replace them. That should fix that problem.

I hope this helps.

DeliveryValve · #20 07-08-2006, 08:25 PM

Quote:

Originally Posted by GlennCraven

So just the green wire is? What's the brown and green? ... I presume I'll need to get a length of wire and a connector cap now to get this reconnected.

It is actually both wires. The solid green and the brown with green stripe need to be properly connected. See pic on the setup from my car. Notice the black covered wire and connector. You will need this wire, including the sensor end connector from a donor car if you don’t have it in yours. So my question is…. Why is this wire cut? It had a nice coupling/connector that is easy to separate! There is no need to cut it.

Quote:

Originally Posted by GlennCraven

It's certainly shaped like No. 83 in the diagram you posted. It's hard to say where it's located. I wouldn't say it is "between/beneath the first and second injectors," nor is it really "between the second and third" injectors, though it's probably closer to being the latter than the former. ... By my memory it's almost directly below No. 2 injector.

Look at the picture on post #8 from DieselDiehard. In that pic and in your car, it is the second sensor from the front that is connected to the temp gauge wiring. The first sensor is No. 83 in the diagram I posted earlier. This sensor will be left unconnected in your ’83.

Quote:

Originally Posted by GlennCraven

We're using the '85 injector pump, which supposedly had electric switches for emissions stuff that was vacuum-actuated on the '83. This I presume is one of the wires left disconnected by the mechanic because he had nowhere to attach it on the '83 chassis/electric system. ... Err, what's the fuel rack position sensor do?

Good Question! Could anybody tell us what is the function of the “Fuel Rack Position Sensor” ?

GlennCraven · #21 07-09-2006, 08:03 PM

Quote:

It is actually both wires. The solid green and the brown with green stripe need to be properly connected. See pic on the setup from my car. Notice the black covered wire and connector. You will need this wire, including the sensor end connector from a donor car if you don’t have it in yours. So my question is…. Why is this wire cut? It had a nice coupling/connector that is easy to separate! There is no need to cut it.

You get what you pay for. The people with MB experience in the Raleigh-Durham area wanted $1,200 for the installation of a salvage yard engine. A local guy said he'd do it for $400. ... Since the '85 engine and '83 engine/chassis/wiring aren't an exact match, he was confused. (Long story detailed in other threads.)

At any rate, at the advice of this board and a top MB diesel mechanic I was referred to by my dad's favorite shop in Missouri, I told him to leave "all the emissions stuff disconnected" ('83 is basically vacuum-actuated, '85 is electric I guess) and gave him the phone number of the guy in Missouri who said he could call with any questions. ... I doubt he ever called the guy, and I presume he cut these wires thinking they were emissions going to the IP and not the gauge wires.

Since the Haynes manual says that the green wire goes to the gauge and the brown/green to the "warning buzzer," and you're telling me they both go into the single black that runs to the sensor, then I guess there's a warning buzzer for when the car overheats?

Quote:

Look at the picture on post #8 from DieselDiehard. In that pic and in your car, it is the second sensor from the front that is connected to the temp gauge wiring. The first sensor is No. 83 in the diagram I posted earlier. This sensor will be left unconnected in your ’83.

I'll have to look at that harder. I don't recall a "first sensor." ... There's one much like at the front of the engine, where the radiator hose (which is leaking a bit) goes down into the thermostat and water pump. That one is connected to a wire.

GlennCraven · #22 07-11-2006, 11:16 PM

Quote:

Originally Posted by GlennCraven

I'll have to look at that harder. I don't recall a "first sensor."

OK, there's definitely a first sensor, with a line plugged into it. And the second one, for the temp gauge and warning light/buzzer is bare, with the wires cut over at the fender. (Doh!)

I'm also leaking coolant now, both at the top radiator hose where it goes into the thermostat and maybe elsewhere. Sometimes a slight drip, like every 5 to 10 seconds, and sometimes a constant flow, and both of those might be whether running or not running. ... WTF? Any guesses?