A tale of two carbureutors
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A tale of two carbureutors
- Thread starter Helomedic1171
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Helomedic1171
Jeeper
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- 149
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- Location
- Savannah
- Vehicle(s)
- '85 CJ7 258, T-176, D300
'58 CJ5 F4-134, T-90, Spicer 18
'54 M38A1 F4-134, T-90, D18 (28VDC and milspec parts)
Good call - I'll pay attention to that.
Helomedic1171
Jeeper
- Posts
- 149
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- 0
- Location
- Savannah
- Vehicle(s)
- '85 CJ7 258, T-176, D300
'58 CJ5 F4-134, T-90, Spicer 18
'54 M38A1 F4-134, T-90, D18 (28VDC and milspec parts)
I keep seeing where people say to just pull the coil out of the Carter electric choke unit and reverse it so that it moves the choke in the correct direction. does anyone have a good way to do this? the coil in mine doesn't seem to want to come loose. If I can't loosen it, I'll probably go manual for a while and get a new thermostat from Mike's parts or ebay later on.
almost done with the linkage, should be putting the carb on today! (yesterday got busy with Christmas stuff...)
almost done with the linkage, should be putting the carb on today! (yesterday got busy with Christmas stuff...)
IOPort51
NOT the voice of reason Jeep-CJ.com
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- Location
- Garland Texas
- Vehicle(s)
- 1977 cj-5
4.2 W/MC2100 carb, 4.0 head W/3 angle valves,SS Header,TFI ignition with MSB-6 offroad module,CS144 140 amp RPS alternator with remote regulator T-150,d-20,Dana 44 with OX lock and disk brakes. D-30 with Spartin locker,
skyjacker 2.5 lift?nitro shocks,31" BFG A/T off road.8000 lb Warn winch, original owner.=^)
2006 Toyota Tacoma
IOPort51
NOT the voice of reason Jeep-CJ.com
- Posts
- 13,956
- Featured
- 5
- Media
- 458
- Thanks
- 15
- Location
- Garland Texas
- Vehicle(s)
- 1977 cj-5
4.2 W/MC2100 carb, 4.0 head W/3 angle valves,SS Header,TFI ignition with MSB-6 offroad module,CS144 140 amp RPS alternator with remote regulator T-150,d-20,Dana 44 with OX lock and disk brakes. D-30 with Spartin locker,
skyjacker 2.5 lift?nitro shocks,31" BFG A/T off road.8000 lb Warn winch, original owner.=^)
2006 Toyota Tacoma
I have an electric choke on my 2100 that is not wired and does not have the stove pipe but it does a very good job of closing the choke when cold and opening when warm enough to run. You will need a working pull-off.
Woolyworm
Old Time Jeeper
IO - so you use just the ambient air and engine temp to move the spring and it works okay for you?
Wooly
Wooly
Helomedic1171
Jeeper
- Posts
- 149
- Thanks
- 0
- Location
- Savannah
- Vehicle(s)
- '85 CJ7 258, T-176, D300
'58 CJ5 F4-134, T-90, Spicer 18
'54 M38A1 F4-134, T-90, D18 (28VDC and milspec parts)
I couldn't resist, I bolted it on and cranked it up and it runs beautifully after I set the timing and tweaked the idle screws. Gonna put a vacuum gauge on it and dial in the carb a bit more, but it's almost there. I love the difference. Going to try and drive it but not until I get the linkage done. I think I'm going to do the straight back cable from a AMC 304 -powered CJ and call it good. I'll keep the bell crank and stuff though in case I need it. Thanks for all the help, I'll put photos up in a couple of days. You guys made this much easier! I'll report back the difference in driving once I know how it drives.
Woolyworm
Old Time Jeeper
Great! I just fogged mine to sleep for the rest of winter 
Wooly
Wooly
IOPort51
NOT the voice of reason Jeep-CJ.com
- Posts
- 13,956
- Featured
- 5
- Media
- 458
- Thanks
- 15
- Location
- Garland Texas
- Vehicle(s)
- 1977 cj-5
4.2 W/MC2100 carb, 4.0 head W/3 angle valves,SS Header,TFI ignition with MSB-6 offroad module,CS144 140 amp RPS alternator with remote regulator T-150,d-20,Dana 44 with OX lock and disk brakes. D-30 with Spartin locker,
skyjacker 2.5 lift?nitro shocks,31" BFG A/T off road.8000 lb Warn winch, original owner.=^)
2006 Toyota Tacoma
so far so good, still a cold natured machine and I don't live in Brewer Maine. But it is closing and opening when I think it should. The electric part, when used, is wired to an oil pressure switch that starts to warm the coil when oil pressure is reached but it is still a thermostatic choke. just be sure to use the choke pull off or it may not want to open all the way.
Helomedic1171
Jeeper
- Posts
- 149
- Thanks
- 0
- Location
- Savannah
- Vehicle(s)
- '85 CJ7 258, T-176, D300
'58 CJ5 F4-134, T-90, Spicer 18
'54 M38A1 F4-134, T-90, D18 (28VDC and milspec parts)
I can take better photos if anyone wants, but here's where I'm at. it runs a lot better than with the BBD. I also finished the nutter bypass.
the V8 linkage I got was too short, so I made the I6 linkage work using the old BBD throttle lever.
cleaning up the new choke housing and choke thermostat, so the cart one is still on the old choke housing. looks clean though! (but still not hooked up.)
this photo shows how I routed my vacuum, and you can kind of see how I did it in the previous photo also.
the elbow in the bottom of the next picture, or more forward on the valve cover, is to the fresh air fitting under the airhorn/chokeplate pulling fresh, filtered air. the PCV at the top of the photo, or rear of the valve cover, gets vacuum from the back of the carb and then goes to the canister.
bowl vent goes to the canister also, the distributor gets its vacuum from the fitting you see in photo 2, and the other two get manifold vacuum as seen in photo 3. I think that's all of them, I may have missed one. the choke pull-off has a dedicated fitting it uses, and in photo 3, you can see where I used the 2-port side of the CTO to run to the canister. so far, so good. let me know what you think.
OH - one more thing, that's the stock filter in the filter element. so I can still go to the parts store and get a filter off the shelf (or run a K&N later if I feel so inclined).
the V8 linkage I got was too short, so I made the I6 linkage work using the old BBD throttle lever.
cleaning up the new choke housing and choke thermostat, so the cart one is still on the old choke housing. looks clean though! (but still not hooked up.)
this photo shows how I routed my vacuum, and you can kind of see how I did it in the previous photo also.
the elbow in the bottom of the next picture, or more forward on the valve cover, is to the fresh air fitting under the airhorn/chokeplate pulling fresh, filtered air. the PCV at the top of the photo, or rear of the valve cover, gets vacuum from the back of the carb and then goes to the canister.
bowl vent goes to the canister also, the distributor gets its vacuum from the fitting you see in photo 2, and the other two get manifold vacuum as seen in photo 3. I think that's all of them, I may have missed one. the choke pull-off has a dedicated fitting it uses, and in photo 3, you can see where I used the 2-port side of the CTO to run to the canister. so far, so good. let me know what you think.
OH - one more thing, that's the stock filter in the filter element. so I can still go to the parts store and get a filter off the shelf (or run a K&N later if I feel so inclined).
- Posts
- 14,800
- Solutions
- 1
- Thanks
- 58
- Location
- Springfield, Missouri-U.S.A. Earth
- Vehicle(s)
- '85 CJ-7, 258/4.2L 6cyl. Bought new in 1985. Full cage, Warn 8274 winch, Ford 9" rear, front/rear Detroit Lockers w/4:88 R&P. T-5 tranny and 4:1 t'case. 33X12.50-15 BFG/AT, MSD ign, on board air---
Why the vacuum hose on the front of the v'cover? 
That's what the PCV valve is for.
LG
That's what the PCV valve is for.
LG
Hedgehog
Always Off-Roading Jeeper
- Posts
- 9,370
- Thanks
- 5
- Location
- Tucson/Marana Arizona
- Vehicle(s)
- -1975 Jeep CJ5, 360 V8, Headers, Duel Exhaust,T15 transmission, D-20 Transfer case, Twin Stick Conversion, Warn 8274 Winch
-1951 Willys Wagon, 4 cylinder, "F" head, little rust, very close to stock
No lumpy I think he has it right. The front is the air intake for the crank case, the rear is where it gets sucked back out with the PVC valve into the manifold.
- Posts
- 14,800
- Solutions
- 1
- Thanks
- 58
- Location
- Springfield, Missouri-U.S.A. Earth
- Vehicle(s)
- '85 CJ-7, 258/4.2L 6cyl. Bought new in 1985. Full cage, Warn 8274 winch, Ford 9" rear, front/rear Detroit Lockers w/4:88 R&P. T-5 tranny and 4:1 t'case. 33X12.50-15 BFG/AT, MSD ign, on board air---
On my 6cyl-front is for oil fill only.
If you pull'n a constant vacuum, as he is, the PCV cant/won't work.......
LG
If you pull'n a constant vacuum, as he is, the PCV cant/won't work.......
LG
Helomedic1171
Jeeper
- Posts
- 149
- Thanks
- 0
- Location
- Savannah
- Vehicle(s)
- '85 CJ7 258, T-176, D300
'58 CJ5 F4-134, T-90, Spicer 18
'54 M38A1 F4-134, T-90, D18 (28VDC and milspec parts)
I have an oil fill in the valve cover, but the valve cover I have has two PCV grommets AND the oil fill.
The diagrams I keep finiding explain it as the hose in the front is fresh air in, which is drawn in because the PCV is sucking the crankcase air out. At least, I think that's what it's saying. The small hose isn't connected to a vac source.
The diagrams I keep finiding explain it as the hose in the front is fresh air in, which is drawn in because the PCV is sucking the crankcase air out. At least, I think that's what it's saying. The small hose isn't connected to a vac source.
- Posts
- 14,800
- Solutions
- 1
- Thanks
- 58
- Location
- Springfield, Missouri-U.S.A. Earth
- Vehicle(s)
- '85 CJ-7, 258/4.2L 6cyl. Bought new in 1985. Full cage, Warn 8274 winch, Ford 9" rear, front/rear Detroit Lockers w/4:88 R&P. T-5 tranny and 4:1 t'case. 33X12.50-15 BFG/AT, MSD ign, on board air---
OK-That makes since. It look'd like that hose was attached to the carb.
You do know that when engine does such in air(it does when you lift your foot off the throttle). If you don't have a breather filter installed. Your pull'n UNFILTERED/DIRTY air inside the engine.
LG
You do know that when engine does such in air(it does when you lift your foot off the throttle). If you don't have a breather filter installed. Your pull'n UNFILTERED/DIRTY air inside the engine.
LG
Hedgehog
Always Off-Roading Jeeper
- Posts
- 9,370
- Thanks
- 5
- Location
- Tucson/Marana Arizona
- Vehicle(s)
- -1975 Jeep CJ5, 360 V8, Headers, Duel Exhaust,T15 transmission, D-20 Transfer case, Twin Stick Conversion, Warn 8274 Winch
-1951 Willys Wagon, 4 cylinder, "F" head, little rust, very close to stock
That is why his breather line is behind or inside the air filter. A common thing inside air filter covers like his. I imagine the intake air is baffled in a way that allows it to travel through the engine before being sucked out. On an AMC V8 there is an intake air filter in the oil cap, most other V8's have one on/in the opposite valve cover from the PVC valve.
- Posts
- 14,800
- Solutions
- 1
- Thanks
- 58
- Location
- Springfield, Missouri-U.S.A. Earth
- Vehicle(s)
- '85 CJ-7, 258/4.2L 6cyl. Bought new in 1985. Full cage, Warn 8274 winch, Ford 9" rear, front/rear Detroit Lockers w/4:88 R&P. T-5 tranny and 4:1 t'case. 33X12.50-15 BFG/AT, MSD ign, on board air---
This is what mine looks like-
The PCV System
I ask'd about that front fitting/hose in post #50(bottom picture), as the picture shows the hose going inside the fitting and that isn't correct at all.
LG
The PCV System
I ask'd about that front fitting/hose in post #50(bottom picture), as the picture shows the hose going inside the fitting and that isn't correct at all.
LG
Helomedic1171
Jeeper
- Posts
- 149
- Thanks
- 0
- Location
- Savannah
- Vehicle(s)
- '85 CJ7 258, T-176, D300
'58 CJ5 F4-134, T-90, Spicer 18
'54 M38A1 F4-134, T-90, D18 (28VDC and milspec parts)
Ah, no, you're absolutely right. It should go over the nipple, but I haven't got the correct elbow yet. For now, it fits in there snug without pinching the hose. I'm picking up a new elbow today.
Helomedic1171
Jeeper
- Posts
- 149
- Thanks
- 0
- Location
- Savannah
- Vehicle(s)
- '85 CJ7 258, T-176, D300
'58 CJ5 F4-134, T-90, Spicer 18
'54 M38A1 F4-134, T-90, D18 (28VDC and milspec parts)
you're both right. I'm using the fitting under the choke plate/air horn seen here on the left side, coming down and out of the plate, above the choke pull-off.
and here again, from a different angle with a nice red background from my parts washer:
that's how I'm getting filtered air without a breather. thanks for that link -
i may have them backwards, I'm going to do some looking and reading to see if I didn't reverse the fresh air and the PCV.
does it matter whether the PCV or fresh air is in a particular grommet? I assume it does - the PCV needs to be baffled, right?
- Posts
- 14,800
- Solutions
- 1
- Thanks
- 58
- Location
- Springfield, Missouri-U.S.A. Earth
- Vehicle(s)
- '85 CJ-7, 258/4.2L 6cyl. Bought new in 1985. Full cage, Warn 8274 winch, Ford 9" rear, front/rear Detroit Lockers w/4:88 R&P. T-5 tranny and 4:1 t'case. 33X12.50-15 BFG/AT, MSD ign, on board air---
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