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So rookie mistake but like a idiot I pulled my carb to rebuild and can’t remember what hoses went where. I was wondering if anyone would happen to have pictures or a drawing. It’s a 71 cutlass with a 2 barrel carb. Feel free to give me crap
thanks guys
Unfortunately I don’t but definitely need to get one. First classic car and trying to do things myself that I thought I could handle and well you see where that got me
You should be spanked for pulling a hair brain stunt like that, and we all have done them from time to time, do what Rocketraider suggested by getting the CSM. It will provide you with a wealth of knowledge. After you get one you will be able to take your car apart and put it back together in your sleep.
Since this is yer first old car, this will help decipher Vcode's diagrams till yer CSM comes:
-A body is a Cutlass
-B-C body are 88 and 98
-Y-72 is heavy duty cooling (included with air conditioning)
-TCS is Transmission Controlled Spark. It prevents vacuum advance to the distributor until transmission is in high gear. More of a nuisance unless you're going for a fully correct restoration.
-DTVS is Distributor Thermal Vacuum Switch. It switches distributor vacuum from ported vacuum to manifold vacuum in overheating conditions. This advances timing to cool the engine.
Don't sweat it bud. We've all dived into the deep end not knowing what we were doing.
Note the difference in usage of both the TCS & the DTVS on the 350 cid 2 bbl engines either with AC or without AC. 350 cid engines without AC employed the TCS only while 350 cid engines with AC employed the DTVS only. Additionally, be mindful many owners removed either the TCS or the DVTS on their engines. If either the TCS or the DVTS has been removed from the engine, the vacuum hose routing will not be as depicted and vacuum hose routing will require a different routing. Don't be surprised if you find either of these devices has been deleted/removed.
A little more clarification. The diagrams posted don't show ALL the vacuum lines, just the ones that apply to the distributor vacuum advance. The 1971 cars used an early emissions control system called Transmission Controlled Spark that inhibited distributor vacuum advance in lower gears in a stop-gap attempt to reduce NOx emissions. There are other vacuum lines on the engine depending on what options you have. Automatic trans requires a vacuum line to the modulator. That's shown in the A/C diagram but not the non-A/C diagram. A/C itself will have a vacuum source, a vacuum operated heater control valve, and other lines to the control head. Power brakes have a large vacuum line. Cruise control has vacuum lines. It would help to know the exact configuration of your car (and any modifications) to allow us to provide you with the correct diagrams.
So I have a ac equipped automatic car. I do have power brakes but I remembered that was the bigger one off the back of the carb. So I have a loose hose that came off the air cleaner housing and a short maybe 4-5” hose that’s laying unconnected on both ends. I remember the smaller hose on the top back side of the carb is the hose with the tee. But I believe there’s 2 or 3 more I’m stumped on. Unfortunately I’m not home at the moment to look at it to make sure
The air cleaner uses a vacuum actuated flapper in the snorkel. That vacuum hose runs from the actuator to the thermal switch on the underside of the air cleaner, then the other hose runs to straight manifold vacuum. It may or may not tee into another hose also connected to manifold vacuum (like the AT modulator). The A/C source also connects to manifold vacuum, then to the vacuum ball storage canister. A separate line from the firewall connects to the heater control valve on the intake. When you get a chance, photos of your current setup would help.
So i just set it up there to mock up but I believe I got it figured out. With the remaining hose going to the air cleaner housing. Let me know if I mixed anything up.
Your first problem is that the TCS valve has been removed and the lines just randomly stuck together. Frankly, your photos are all too close and don't give a picture of what lines connect were. There are too many generic tee fittings, it appears that you may have ported and manifold vacuum sources connected together, and I guarantee that there should not be a hose that loops from one carb fitting to another.
I would like to inject what I perceive as flaws in this dialogue. A 1971 350 cid 2bbl WITH AC did NOT have a separate T.C.S. solenoid installed; therefore, it was NEVER removed because it was never assembled with a separate T.C.S. solenoid. If anyone cares to refute my assumption, please demonstrate for me in a PIM or CSM where a 1971 350 cid 2bbl WITH AC is depicted as having incorporated a separate T.C.S. solenoid and I'll stop my rant.
A 1971 350 cid 2bbl WITHOUT AC does in fact have a separate T.C.S. solenoid installed. The OP does not own a 1971 350 cid 2bbl WITHOUT AC. His engine has AC and therefore no separate T.C.S. solenoid.
A 1971 350 cid 2bbl WITH AC has what is referred to by nomenclature THROUGHOUT the 1971 Chassis Service Manual (CSM) as a Distributor Vacuum Control Switch (DVCS). Look, I realize many have far more knowledge about the first use of these emissions devices, and I have personally reviewed several PIM and CSM manuals and I can state for a fact that General Motors Oldsmobile Division created a new name for these devices in nearly every printing since its first inception. (The 1972 PIM refers to the DVCS as the DVS). Later years Oldsmobile refers to the device as a DTVS. It is NOT referred to as a DTVS in the 1971 CSM; therefore, can we use the term which is written/stated and depicted in the 1971 CSM as a DVCS so the OP doesn't become any more confused. The same may hold true for Ford, Chevrolet, Pontiac, etc. But, the fact remains, the OP has a 1971 350 cid 2 bbl WITH AC; and, for this conversation to make any sense I believe it's important to employ the correct nomenclature AS DESCRIBED in the 1971 CSM. You WILL NOT find any mention of a Distributor Thermal Vacuum Switch (DTVS) in the 1971 CSM. When the OP receives his 1971 CSM it will specifically address these two items as the T.C.S. solenoid and the DVCS - not a DTVS.
Let's use the the nomenclature which is consistent with the 1971 CSM so the OP can make some sense out of what he is going to read in the 1971 CSM.
This is the description of the DVCS as written in the 1971 CSM. vCode442 has already provided the correct illustrations for the 350 cid 2bbl engine both WITH and WITHOUT AC. One should note the illustration clearly states the device is referred to as the Distributor Vacuum Control Switch. (I will note in a separate post it appears his DVCS has either the top electrical solenoid switch broken off from the top of the valve body or it's not the DVCS which belongs in this engine.)
So I think it might be the wrong one. But I didn’t touch any of the hoses plugged into it only on the carb side. And when I placed it back on it seemed like that’s where the hoses went.
It appears to me (which I cannot make out clearly) the electrical solenoid switch is either broken off or removed from the DVCS in the engine. Can you see any electrical wires either laying around, taped up, or otherwise which might suggest the electrical solenoid switch has been removed? Here is a picture of a DVCS mounted in a 1971 350 cid. Note the top of this DVCS has electrical wires which attach to the top of the DVCS electrical solenoid.
It "appears" to me, I do not have enough knowledge of "other" years of Oldsmobile production models to say with any degree of certainty what year that vacuum valve was used? I can state for certain it is NOT what was used on a 1971 2bbl 350 cid WITH AC (or any 455 cid of the same 1971 model year), others may know.
I can demonstrate to you what is used on the 1971 350 cid 2bbl WITH AC and all 455 engines (from the 1971 CSM). This is a description of the operation of the Distributor Vacuum Control Valve. NOTE: The DVCS is comprised of two units: (1) The electrical solenoid which resides on top of the (2) valve body.
It "appears" to me, the DVCS you have installed is not consistent with your application for a 350 cid 2bbl WITH AC. Others may know.
This is a general explanation (1971 CSM) for testing the T.C.S (Transmission Controlled Spark), which (if you've been following along) is comprised of two circuits: (1) Vacuum and (2) Electrical. Don't worry now about the testing, I'm presenting this illustration to you as yet another description of the TCS system. Note the routing of the electrical wires (transmission & ignition switch). I "suspect" the wire wrapped in tape with a plug at the end is for the correct DVCS installed on a 1971 350 cid WITH AC (or any 455 engine of the same model year).
You're gaining a significant amount of information prior to arrival of your own CSM (but,you'll hopefully be ahead of the game when it arrives).
NOTE: You seriously need to clean up intake manifold chimney stove pipe(s) for the choke. Currently, you will never have a functioning choke.
If you remove the tape around the wires with the plug at the end and you find two wires - one dark green the other black with a red stripe, those would be correct for the DVCS transmission controlled spark solenoid. Hopefully you ordered an original paperback edition 1971 CSM - it contains a color wiring diagram. In the meantime, here is a link to one posted on CO. 1971 Original GM Oldsmobile CSM Wiring Diagram A Body "V-8"
thats the one that I believe goes to the air filter housing. Just a bad angle but it’s not
hooked up on the one end. in another picture it’s the same hose in my hand
