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Old 08-08-2007, 06:17 PM   #1
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Weber or MC 2100?

Hello all,
I am a recent Jeep wrangler owner (1990 Sahara 4.2) it has 135k miles and was sitting for a few years after the owner died. I recently gave it a tune up with your basic oem parts like plugs, wires and ignition coil. I also replaced the gummed up Carter bbd with a rebuilt one from advance auto. thinking that would solve my problem of poor idling. Well it did solve that but once I got it on the road the hills here in upstate NY were killing me. absolutly no power. I took it to a mechanic buddy of mine that tweaked the carb asmuch as he could but still would bog down. I know this is a common problem with this oem carb. This forum suggests getting either a weber carb or the mc2100 I am leaning to the mc 2100 but would like input from real jeep owners not a sales pitch from a website. also what else would I need to complete the conversion. would I HAVE to get the HEI and higher voltage system? This is to be a daily driver with some moderete to occasional off road at least for now. I just want it much more reliable than it is now. Thanks in advance for any helpful hints or suggestions

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Old 08-08-2007, 06:33 PM   #2
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a lot of people here suggest the fuel injection conversion kit. It runs around a grand you never have to worry about it again.
The carbs I dont know about.

Where in NY are you?

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Old 08-08-2007, 06:44 PM   #3
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Quote:
Originally Posted by bernm8r View Post
Hello all,
I am a recent Jeep wrangler owner (1990 Sahara 4.2) it has 135k miles and was sitting for a few years after the owner died. I recently gave it a tune up with your basic oem parts like plugs, wires and ignition coil. I also replaced the gummed up Carter bbd with a rebuilt one from advance auto. thinking that would solve my problem of poor idling. Well it did solve that but once I got it on the road the hills here in upstate NY were killing me. absolutly no power. I took it to a mechanic buddy of mine that tweaked the carb asmuch as he could but still would bog down. I know this is a common problem with this oem carb. This forum suggests getting either a weber carb or the mc2100 I am leaning to the mc 2100 but would like input from real jeep owners not a sales pitch from a website. also what else would I need to complete the conversion. would I HAVE to get the HEI and higher voltage system? This is to be a daily driver with some moderete to occasional off road at least for now. I just want it much more reliable than it is now. Thanks in advance for any helpful hints or suggestions
I have the 88 YJ with 258CID motor. Bought it with 155,000 miles. It was boggy from the day I bought it. I elected the HEI and the MC 2100. My experience has been so-so with the conversion. It ran great here in AZ at 6600 ft elevation for a year, then I started having trouble with the HEI. Burned up 3 ignition modules in a couple of months. Am considering the MSD 6 Offroad module. Also discovered the real problem with the MC 2100 is they are shipped with .47 or .49 jets. Am converting to .42's to lean it out at my altitude.

No matter what you do you are not going to get more than 15-16 MPG. Check out the options by googling (258 CID HEI conversion) and (MC2100 swap) Do a lot of reading before you do anything else.
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Old 08-08-2007, 06:46 PM   #4
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Hello George,
I am in Sullivan county NY in Liberty
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Old 08-09-2007, 07:24 AM   #5
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I have a weber 34 on my '89 and am pretty happy with it. I cant compare it to the stock carb though since I never drove it with it. I get up to highway speed in a reasonable amount of time and I dont think it struggles too bad on hills. Cant comment on the mc2100 either. I got my carb for $300 delivered.
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Old 08-09-2007, 11:16 AM   #6
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I love my Howell fuel injection. When I did the conversion I put on a header, high flow cat, and a flowmaster muffler all at the same time. That really woke up my Jeep and it will get up and go now. That was about a $1500 upgrade though. If you are real handy with wiring this could be done much cheaper with junk yard parts. The computer and throttle body are from a GM 4.3. I think I saw a write up on doing it yourself one online, just can't remember where.
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Old 08-09-2007, 03:57 PM   #7
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wow, i've never met anyone else who even knows where liberty is! i grew up in eldred/barryville, i used to go to liberty all the time. Sullivan county is my home.
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Old 08-09-2007, 05:38 PM   #8
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my 90 yj came with a weber, so i can not compare to orginal but it does not seem to have loads of power. on the hills around sullivan county pa, it wont pull some hills the high gear. its the 3 speed auto the 5 speed might help.
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Old 08-13-2007, 02:34 PM   #9
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Schecterguy,
yea I have lived here for 3+ years now. I am originally form Orange County NY but it is beautiful up here. Any jeep guys here locally to shoot the crap about jeep stuff? wife is sick of hearing "jeep this and jeep that"

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