To retain the PCV valve you must retain the vacuum tubing from the valve to the manifold hole below the carb. You can plug the end of the "T" fitting that had the tube to the vac pump side of the fuel pump since you have a single action pump.
The green, red and purple plumbing is probably missing on your jeep. The yellow plumbing should be retained but since you have a single action pump the X, V & EE tubes are not being used as are the CC and DD fittings. You will need to retain Y, Z, HH and GG for the PCV system.
Later in the warm weather if you start destroying ignition coils from overheating you will need to reconsider using the rear parts of the yellow plumbing and the green plumbing for the distributor vent system. This system helps coil the coil as well as remove chemical fumes from the housing. To do this you will have to install the correct dual action fuel pump. _________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
Joined: Jan 09, 2011 Posts: 32 Location: Sumter S.C.
Posted: Mon Jan 24, 2011 3:50 pm Post subject:
Well guys I just don't believe it.After 20 plus years with your help I found why it would not idle.The fitting that the pcv valve plugs in to attaches to a metal line that runs around the front of the motor to the carburetor.That fitting has another opening that I think went to the fuel pump.When the electric fuel pump was installed,whoever did it took the piece of the metal line going to the original fuel pump, cut it off and put a small piece of rubber hose on that and left it open.It has been that way since I have had it.I can not imagine that being open was a good thing because of how much dust was probably sucked in there but there is nothing I can do about that.I put a plug in the end of the fitting and it is running like a top.Is it ok to leave it plugged like that?Would you recommend I replace the pcv valve just to be on the safe side.It is running fine now so I guess it is ok.One more question.On the oil fill tube there is a piece of hose that runs to the top of the valve cover.There is another opening that comes off the filler tube that points towards the pass side of the jeep.I assume there used to be a hose that ran to the fording valve between the air cleaner and carburetor.That valve is no longer there and has been replaced with a solid tube.Should I put some sort of plug in the fitting on the oil filler tube also?Thanks for all the help.Jim
Joined: May 14, 2009 Posts: 972 Location: South Dakota
Posted: Mon Jan 24, 2011 6:39 pm Post subject:
I was just testing for a vacuum leak. They are hooked back up, I had no change plugged on mine. I did take one of the two covers back off installed, but it was difficult to say the least, and it will empy the carb of gas, so you need a big rag to soak it up. I also know the inside nut is a real $%#$^ to get off so you can remove the carb. It's easier with the valve cover off. Are you running the fuel through the old pump with the electric pump? I wouldn't do that if you are. If it develops a leak on the pump diaphram, it could put the gas into the engine block and oil. BAD!
Joined: May 14, 2009 Posts: 972 Location: South Dakota
Posted: Mon Jan 24, 2011 6:51 pm Post subject:
Well congratulation Big Jim! You kept at it and didn't give up. I just caught up with all after posting from Email. Wes made a huge point about the distributor getting the coil too hot without the vent tubes functional. I would get that hooked back up according to the diagram if you can. Wes and his diagrams-------very helpful. Wes, are you and Ryan going to put out a book on A1's??????? You should consider a common or FAQ mechanical section with your diagrams. I want the first book!!! John
Joined: Jan 09, 2011 Posts: 32 Location: Sumter S.C.
Posted: Mon Jan 24, 2011 7:46 pm Post subject:
OK last question(well maybe) the pcv valve circuit is completely intact and functioning correctly.The only thing I have plugged off is the line that went to the original fuel pump from the fitting where the pcv valve plugs in to the line from the carb..I am not running gas through the old pump.I go directly from tank to carb. via the electric fuel pump then a filter and now a pressure regulator.Is it ok to leave that one line plugged as long as the pcv valve circuit is functioning properly.Thanks Jim
I am using an electric fuel pump.Does that change any of the above info.
NO
As I posted above Jim
Quote:
To retain the PCV valve you must retain the vacuum tubing from the valve to the manifold hole below the carb. You can plug the end of the "T" fitting that had the tube to the vac pump side of the fuel pump since you have a single action pump.
So the answer to your questions:
1-
Quote:
Is it ok to leave it plugged like that?
YES
2-
Quote:
Would you recommend I replace the pcv valve just to be on the safe side.
If it's not broke, don't fix it.
3-
Quote:
On the oil fill tube there is a piece of hose that runs to the top of the valve cover.There is another opening that comes off the filler tube that points towards the pass side of the jeep.I assume there used to be a hose that ran to the fording valve between the air cleaner and carburetor.That valve is no longer there and has been replaced with a solid tube.Should I put some sort of plug in the fitting on the oil filler tube also?Thanks for all the help.Jim
YES
4
Quote:
Is it ok to leave that one line plugged as long as the pcv valve circuit is functioning properly.
YES the same as 1 above.
If you drive the jeep slow a lot around town, off road or in parades in hot weather expect short coil life. These 24 volt coils are pushing $80 to $100 a pop these days. So I would advise you go back to the more than adequate dual mechanical fuel/vacuum pump and reinstall the appropriate plumbing. This will save you money down the road and it will increase the resale value of your jeep. If these issues are not important to you you can still cool the distributor housing with a modified vent system. You simply unplug that "T" fitting and insert the restrictor fitting that went in the wiper "T" (DD in the illustration above) in that "T" and run a vent line (an extended version of tube EE in the illustration above) from there to your distributor. Then run the fresh air in vent line from the other hole in the distributor to your air cleaner. _________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
Joined: Jan 09, 2011 Posts: 32 Location: Sumter S.C.
Posted: Tue Jan 25, 2011 6:11 am Post subject:
Thanks Wes.So much of that stuff has been removed or modified before I got it many years ago that I have a hard time knowing what should be where.I don't have a lot of experience with stuff like this so it has been so much trial and error over the years.I think I will leave it like it is for now.Resale is not a big deal for me.I sold it once and regretted it so I bought it back.I have been just driving it around home no parades or anything.I will have to go back and look at this in a new light now.I think those fittings in the distributor are not plugged so it is probably getting some fresh air.It has been that way a long time so I guess it will be ok a litttle longer.I am trying to get it back a little closer to where it should be however.These diagrams are great.I would have never figured out what you were saying without them.Thanks again Jim
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