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  #16  
Old 03-05-2021, 07:49 PM
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Simple enough to test. Wire a horn/test light/buzzer to the start terminal. Run a ground to the device. Turn key to "Start" position. Added device should activate. Work back from there to the NSS.

That is MBTex.

Yeah, those verplunkt screws are a pain. I use an offset screwdriver to access the one screw. Keep a magnet handy. You WILL need it to find the screw which you will drop two or three times.

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You do have the instrument binnacle out, don't you?

Are the two "low" cylinders adjacent?

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Last edited by Mike D; 03-05-2021 at 08:12 PM.
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  #17  
Old 03-06-2021, 10:39 AM
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Ok that makes sense. I will work on troubleshooting more as it gets warmer. 21 deg in NE PA today.

Those screws are a pain!

Yes the instruments binnacle is out.
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  #18  
Old 03-06-2021, 10:40 AM
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And no they were not adjacent. Just dry. A little oil and they pumped up. And they stayed that way.
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  #19  
Old 03-06-2021, 03:22 PM
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just a thought but can you check for power at starter? or at least continuity from starter switch. Could be a bad solenoid. BTW beautiful car
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2011 Porsche Cayman - Bond,James Bond
Sadly MERCEDESLESS - ALways LOOKING !
99 E320 THE Queen Mary - SOLD
62 220b - Dolly - Finally my Finny! Sadly SOLD
72 450SL, Pearl-SOLD
16 F350 6.7 Diesel -THOR
19 BMW X5 - Heaven on Wheels
14 38HP John Deere 3038E Tractor -Mean Green
84 300SD, Benjamin -SOLD
71 220 - W115-Libby ( my first love) -SOLD
73 280 - W114 "Organspende" Rest in Peace
81 380 SL - Rest in Peace
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  #20  
Old 03-07-2021, 07:09 AM
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Thanks for the compliments. I appreciate that.
Well. I found it.
In between the NSS and the starter there is a complete break in the wire harness! Right under the Power steering reservoir on the drivers side the wires run up the front clip and are attached to the body by a factor clip. This occurs right before they meet with another harness. They are completely cut through!
Either they wore out that way or they were eaten by mice I guess. Not clean but real jagged.
Someone had messed with the NSS before and broke it. Bought a new one and Now thatís fixed. Guess I didnít need a new ignition switch though but that would explain why I had no power at the NSS.
Also the cars reverse bulbs were both removed. Wonder if whomever worked in it before was trying to trouble shoot it and the NSS. Maybe the same hack who broke the old NSS?
Anyways I could not feel my fingers enough to wire it back. Too cold. Should be warmer this week.
Canít wait to get this running. Want to get it into the garage and on a lift so i can properly go through it.
Plan on putting back the rebuilt carbs, coating the fuel tank, changing the fuel pump- been sitting since 1995- checking the valve clearances, detailing the valve cover and air cleaner, changing the fluids etc.
thanks for all the advice thus far!
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  #21  
Old 03-07-2021, 12:06 PM
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it could have been two hacks. One breaking the switch and the other trying to bypass it.
The missing lightbulbs could be explained by a short in the wiring leaving them on all the time, so that missed opportunity would have been after one or the other faults.
-CTH
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  #22  
Old 03-07-2021, 01:18 PM
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detective work for sure, but that is half the "fun"
when you have some time , check out my journeys

http://www.peachparts.com/shopforum/vintage-mercedes-forum/134622-1971-220-a.html
http://www.peachparts.com/shopforum/vintage-mercedes-forum/376816-dolly-finally-my-finny-journey-continues.html

may find some tips in there , keep us posted !
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Ron
2011 Porsche Cayman - Bond,James Bond
Sadly MERCEDESLESS - ALways LOOKING !
99 E320 THE Queen Mary - SOLD
62 220b - Dolly - Finally my Finny! Sadly SOLD
72 450SL, Pearl-SOLD
16 F350 6.7 Diesel -THOR
19 BMW X5 - Heaven on Wheels
14 38HP John Deere 3038E Tractor -Mean Green
84 300SD, Benjamin -SOLD
71 220 - W115-Libby ( my first love) -SOLD
73 280 - W114 "Organspende" Rest in Peace
81 380 SL - Rest in Peace
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  #23  
Old 03-09-2021, 07:41 PM
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Thumbs up

Welcome Newbie ~.

Your car looks great and sounds like it'll be terrific once you get it sorted out .
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1982 240D stripper 393,000 miles
1984 300CD KEEPER ! 481,XXX miles
1984 Euro 300TD Fully optioned SWMBO's
1974 350SLC 4 speed SOLD & missed
Kooky Kommie Ural Motocycles (3)
BMW Moto R60/6 Barn Find, 8,000miles
1959 VW #113 DeLuxe Beetle, 36hp engine, stock
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  #24  
Old 03-23-2021, 09:24 PM
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Ok got it cranking!
Adjusted the valves. Changed the oil with Dinosaur 10-40 and high dose of ZDDP and a new filter.
New VC gasket
New Fuel pump- not cheap, filter and lines. Bypassed the 25 year old fuel in the tank. Ran it Roadkill style.
Put the carbs bask in that I rebuilt.
Took quite a few cranks but the filter filled up and she fired for the first time in 25 years!
You should have seen what blew out the tail pipe! Acorns, stuffing, twigs. Lol.

Thatís the good

The bad is it wonít idle. Not sure if the accelerator pumps are working either.
Also have a leak at the fuel return valve on the front carb. Pretty good leak. I pulled the return valve and I didnít rebuilt it because no parts came in my $120 full rebuild kit from out host. Thatís per carb! Damn expensive and I used almost none of the kit.

So I thought I had a bad vacuum leak which is why it wonít idle. I plugged the power brake and the other 3/8 inch bung on the intake manifold. Didnít seem to help.

Ran out of fuel so Iíll try again another day.
First Iíll look for that fuel return valve. Then Iíll work on the idle
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  #25  
Old 03-24-2021, 11:22 AM
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If your dwell and timing are dialed in you probably don't have the throttle plates adjusted correctly. Did you set them on the bench per spec? If so they should be pretty close. Do you have a Unisyn or other carb synch tool? That's the only way to get them right. Keep messing with it and you will get it.
Your fuel return valve is probably leaking because of a bad diaphragm. There is only one
place I have found them, here:
https://classiccarbs.co.uk/product/zenith-inat-carburettor-fuel-return-needle-valve

If the diaphragm looks good it can still leak at the rivet.
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  #26  
Old 03-26-2021, 12:16 PM
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Post Won't Idle

Don't forget to chek those tiny brass idle jets ~ if it's about to stall out unscrew one 1/4 turn, if the engine suddenly tries to run again that's the problem : the idle circuit .

You're almost there ! .
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-Nate
1982 240D stripper 393,000 miles
1984 300CD KEEPER ! 481,XXX miles
1984 Euro 300TD Fully optioned SWMBO's
1974 350SLC 4 speed SOLD & missed
Kooky Kommie Ural Motocycles (3)
BMW Moto R60/6 Barn Find, 8,000miles
1959 VW #113 DeLuxe Beetle, 36hp engine, stock
Junk, Rust, Arthritis, Crushed Spine,Broken Neck, Back & arm, lots of screws, pins & plates .
Memories, Peace Of Mind
facts & reality don't change because you can't handle them
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  #27  
Old 04-14-2021, 09:10 PM
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Join Date: Dec 2020
Posts: 15
Ok so here is where I am now.
I fixed the fuel return valve with some rubber gasket maker and sealer.
First Car wonít idle. Feels like a huge vacuum leak. I blocked off the 2 big culprits, the lead to the power brake booster and the one on the intake that goes to the air cleaner.

Is there another one that I could be missing?

Second The rear carb seems to be doing the Lionsís share of the work. The rear accelerator pump is squirting. The rear exhaust manifolds are hot
The front manifold is not.
I adjusted the fronts accelerator pump and put on a new rubber diaphragm. Still no squirt.
I checked the floats and they are in spec
Car wonít start unless I squirt some fuel in the bores.
Car needs quite a bit of throttle to keep it running. Wonít idle. I went through about 2 gallons in 8 minutes. My fuel source is just a gas can as I didnít want to use the tank bc the car sat for 24 years.
The front exhaust manifolds are warm to hot. The back are HOT.

Any ideas fellas?
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  #28  
Old 04-14-2021, 10:42 PM
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Post Hard Start & Bad Idle

I'd look at failed intake to cylinder head gaskets next....
__________________
-Nate
1982 240D stripper 393,000 miles
1984 300CD KEEPER ! 481,XXX miles
1984 Euro 300TD Fully optioned SWMBO's
1974 350SLC 4 speed SOLD & missed
Kooky Kommie Ural Motocycles (3)
BMW Moto R60/6 Barn Find, 8,000miles
1959 VW #113 DeLuxe Beetle, 36hp engine, stock
Junk, Rust, Arthritis, Crushed Spine,Broken Neck, Back & arm, lots of screws, pins & plates .
Memories, Peace Of Mind
facts & reality don't change because you can't handle them
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  #29  
Old 04-14-2021, 11:18 PM
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Posts: 1,556
Agree with vwnate1, look for an intake manifold leak at the gaskets. Can the carbs be switched front to rear for test purposes?

Good catch on the temp difference on the manifolds. Going back to things flying out of the exhaust, I'm wondering if one of the exhaust pipes and/or manifolds is blocked.

Good luck!!!
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  #30  
Old 04-15-2021, 09:09 AM
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Never thought of an intake manifold leak. Iíll look for that next.
And ya know what? I was running it and there is still crap blowing out of the exhaust! I wonder if there isnít something stuck in there. Hmmmm. Ok. Thanks for the encouragement all of you. Maybe a combo of both
I prob could switch the carbs too. They are difficult to get off however.
Iíll report back

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