OFFICIAL mc2100 (non emissions) thread if you have done it get in here.

[rolledthatho]

hey guys ive made post after post with specific problems of my mc2100, for some reason its not been an easy swap for me, like it seems to be for everyone else...

this thread will help me and hopefully anyone coming after me who does this. and any problems that anyone ever runs into will be in here and with some searching can be answered in this thread hopefully. anyone who has done this non emissions (so we're on the same page) can and would be appreciated if they could just post pics, different angles of how they have it hooked up. and problems they ran into etc.


what im struggling with now is:

there is a blue wire with a spade connector on it, i believe it was the electric choke on the carter bbd, and i have had mixed opinions some say, my mc2100 has a spot for it to hook right here on the choke. other say cut the wire and tape it off... i dont see anywhere on my choke for this wire to clip or go. people who have done this do you know what im talking about

2nd the car is diseling bad like 10-15 seconds after cut off, so many people say its carbon buildup, and that makes sense however when you have a perfectly running jeep one day, and you do the carb upgrade and the very next day you crank and cut it off, and it diesels like that, i think something else is wrong, anyone have dieseling issues?



discuss anything mc2100 related, apparently you cant learn too much about this carb, i still havent got mine hooked up and its driving me insane...


anyone with pics of that electric wire, or what they did or hooked it to would help.

also what other lines did you guys have hooked up??

dizzy advance and pcv is all i have i know im missing at least one more... maybe thats my dieseling prob. what else hooks up

thanks again for anyone help or contribution to this thread

happy jeepin

[rolledthatho]

bump for the dinner crew any word on that (electric choke?) wire?

[mean90yj]

sry i don't have a mc2100, i have the 32/36 weber, although with dieseling, it is soemtimes caused by running rich, if you have to much gas going into the carb. it can cause it to try and keep running, it happened to me when i turned down my idle screw but forgot to adjust the mixture screw, try some seafoam to clear out your carb. and engine, put some in the oil, and then the rest in the carb. put it in the carb. while its running, pour it in slowly, and then when u've put about 1/3 of the bottle in pour it in fast to stall the engine. let it sit for 5-10 minutes, start it back up and watch the smoke POUR out of the tail pipe, its normal, and exciting to watch.

[rolledthatho]

Originally Posted by mean90yj

sry i don't have a mc2100, i have the 32/36 weber, although with dieseling, it is soemtimes caused by running rich, if you have to much gas going into the carb. it can cause it to try and keep running, it happened to me when i turned down my idle screw but forgot to adjust the mixture screw, try some seafoam to clear out your carb. and engine, put some in the oil, and then the rest in the carb. put it in the carb. while its running, pour it in slowly, and then when u've put about 1/3 of the bottle in pour it in fast to stall the engine. let it sit for 5-10 minutes, start it back up and watch the smoke POUR out of the tail pipe, its normal, and exciting to watch.

yeah im very familar with seafoam, i prefer adding it through the brake booster, then some in the oil and a little in the gas, but im gonna try to fix the dieseling (to the best i can anyway) before i do it because i have a fresh oil change, and your not supposed to run sea foam, unless your nearing an oil change or else the sludge and carbon just goes into the oil pan and all the deposites keep running through the engine

me and you need to get up sometime just so i can look around your engine bay. did you install the weber or was it on there?

[drexelsteve]

what are you idling at. Should be around 6-700 with the mc2100. anything higher than that , i'd say about 1000, would cause dieseling when you kill it. Mine purrs at 600.

[Kush69]

Mine has an electric choke..

[rolledthatho]

Originally Posted by Kush69

Mine has an electric choke..

im pretty sure mine does too, i havent converted to manual choke, so....

where did you hook your electric choke at??? there is no stud or clip on my elec. choke on my carb... just trying to figure out where this wires goes

btw drexel i NEVER thought about that... it does idle very high and it hasnt been timed yet because... well you havent been updated. since you have helped me so much before ill explain...

i nuttered it... (or so i thought) i think it had already been nuttered (up inside the harness) for some reason the previous owner did a lot of hacking at the wire harness i guess all the nutter was inside the loom and not right at the dizzy or icm to be seen... i think anyway

also my elec choke wire grounded out when i cranked it up and melted. it melted to like 4 other wires, which i had to pull apart and wrap to make sure they were insulated... so everything is ready to be cranked and timed when i figure out where this elec choke clip goes...

as you know i know nothing about carbs, once i time it to 9-11* and its still on high idle (which i think it will be, because i was timing it by ear before the harness melted and it was still idleing high) is there an idle screw? where is it? is it cool to mess with or should i leave it alone?, which way do i turn it?

[timatoe]

Originally Posted by rolledthatho

.....it hasnt been timed yet ......

I would bet that's the cause of the dieseling.

[camcrazy]

My electric choke wire is green with a white stripe that plugs into the side of the electric choke that has a small metal plug sticking out from the bottom side of the choke assembly. I have my idle set at 650 rpm. Recently the wire came off of my electric choke causing the choke to stay on which would idle my engine at about 1100 rpm and when I turned it off it would cause the diesling like you described. I think if you figure out the correct wire to connect your choke you should be good to go.

[rolledthatho]

Originally Posted by camcrazy

My electric choke wire is green with a white stripe that plugs into the side of the electric choke that has a small metal plug sticking out from the bottom side of the choke assembly. I have my idle set at 650 rpm. Recently the wire came off of my electric choke causing the choke to stay on which would idle my engine at about 1100 rpm and when I turned it off it would cause the diesling like you described. I think if you figure out the correct wire to connect your choke you should be good to go.

cam where you located??? i ask everyone that, that i notice is from NC. anyway

the small electric choke wire plug you speak of... does it look like this?



is there ANY way you can get a picture of where it hooks up, everyone says it goes on the little tip on the bottom of the choke and i dont have one on mine...

i bet you guys are right about the dieseling too, man once i figure this choke out im gonna get this thing going

also what vacumme lines do you guys have hooked to yours, i know im missing at least one, i have

side of the carb to dizzy advance, and manifold from carb to a manifold source

thats it what else?? i know im missing something

[philly5eagle]

I'm glad you started this thread. I just bought my motorcraft from the ebay guy. Got it hooked up and at first when the timing was set at 9* at 1600 rpm(according to the tach gauge) It would idle fine but if you drove it and pushed the pedal past 1/4 it would bog down. I came back and reset the timing at 9* at idle and it runs very good. However I may be having a problem withe choke also b/c even with backing out the idle screw all the way it now idles at 900-1k.
I did find a little clip on the side of the choke. If you are facing the the engine from the front of the carl the choke is on the left side with the clip on the left side facing down.
Where did you get the choke and carb from?
I will try to take a pic and post if on here if I can figure out how. Do you have a picture of your choke?
We'll get these things figured out.

[philly5eagle]

Originally Posted by rolledthatho

cam where you located??? i ask everyone that, that i notice is from NC. anyway

the small electric choke wire plug you speak of... does it look like this?



is there ANY way you can get a picture of where it hooks up, everyone says it goes on the little tip on the bottom of the choke and i dont have one on mine...

i bet you guys are right about the dieseling too, man once i figure this choke out im gonna get this thing going

also what vacumme lines do you guys have hooked to yours, i know im missing at least one, i have

side of the carb to dizzy advance, and manifold from carb to a manifold source

thats it what else?? i know im missing something

I hooked up the pcv hose to the back of the carb before I even started it. Had the dist capped off but now I have a vacuum hose from the dist to the small port on the bottom front of the carb(don't know if it is in the same place on yours, the guy marked it for me before I got it.) There is a bowl vent port on the top that I capped off. That is the only things I hooked up. I got rid of all the other hoses. Only have a vacuum hose from the brake booster to the intake manifold. The other spot on the top of the valve cover is for the breather filter etc. Guys have it hooked up different ways, but I just put one of those small breather filters you can pick up at advance auto etc and attached it right on there.

I have an 87 4.2.
I think the prev owner screwed up the 4x4 vacuum hoses b/c the green and yellow hoses are just coming up from the diff but don't go anywhere. That is another topic though!

I believe you should not try to set the timing with the dist vacuum hooked up. Cap off the dist port at the carb and cap the hose coming out of the dist when you are setting the timing.

[rolledthatho]

Originally Posted by philly5eagle

I'm glad you started this thread. I just bought my motorcraft from the ebay guy. Got it hooked up and at first when the timing was set at 9* at 1600 rpm(according to the tach gauge) It would idle fine but if you drove it and pushed the pedal past 1/4 it would bog down. I came back and reset the timing at 9* at idle and it runs very good. However I may be having a problem withe choke also b/c even with backing out the idle screw all the way it now idles at 900-1k.
I did find a little clip on the side of the choke. If you are facing the the engine from the front of the carl the choke is on the left side with the clip on the left side facing down.
Where did you get the choke and carb from?
I will try to take a pic and post if on here if I can figure out how. Do you have a picture of your choke?
We'll get these things figured out.

yeah man thats where everyone has told me it was, im going to get some pics of my carb soon and ill post them up.. but yeah if you have a pic that would be cool, i got the carb at advance autoparts, i found the partnumber it was a mc2100 with 1.08 venturi tubes....


thanks for you help man

Originally Posted by philly5eagle

I hooked up the pcv hose to the back of the carb before I even started it. Had the dist capped off but now I have a vacuum hose from the dist to the small port on the bottom front of the carb(don't know if it is in the same place on yours, the guy marked it for me before I got it.) There is a bowl vent port on the top that I capped off. That is the only things I hooked up. I got rid of all the other hoses. Only have a vacuum hose from the brake booster to the intake manifold. The other spot on the top of the valve cover is for the breather filter etc. Guys have it hooked up different ways, but I just put one of those small breather filters you can pick up at advance auto etc and attached it right on there.

I have an 87 4.2.
I think the prev owner screwed up the 4x4 vacuum hoses b/c the green and yellow hoses are just coming up from the diff but don't go anywhere. That is another topic though!

I believe you should not try to set the timing with the dist vacuum hooked up. Cap off the dist port at the carb and cap the hose coming out of the dist when you are setting the timing.

NO dude thats exactly the same as mine, everyone was like you need to hook manifold to your 4x4 but i looked and all the hoses i was supposed to connect are cut exactly like yours but my 4x4 still works...????

and yeah your supposed to cap the dizzy off, and time it then put it back on, i knew that but good info

[rolledthatho]

EDIT my computer is acting crazy, double post sorry

[philly5eagle]

Didn't get to take a picture yesteday due to the rain but I'll try to get one this evening after work.