I am brand new to this forum and found it while running a search for white smoke/black smoke coming from CJ7. I followed the discussion between CJMEDVAC and David until either I ran out of pages or David stopped replying to CJMEDVAC (The Medic). Anyways. I was so close to a potential answer to my questions as well. Gonna throw this out there, recently I removed all of the cancer from my '86 CJ7 and sprayed her exterior with Rhino Lining. Love it or hate it (I love it). But moving on. As things go. The day after I did this I started having issues with her. This was two days before Thanksgiving. It was flooding rain, live in South Georgia where the weather shifts extremes from day to day, and I pulled up to my buddies body shop. I noticed that the Jeep had steam coming from the radiator, associated it with water being splashed up into the engine compartment but checked the radiator anyways. It was full. The very next day it was absolutely freezing and I ran the Jeep up to my work to show off her new look. Stayed an hour or so and came out to head to town for Christmas shopping. Now I have always had to pump the gas to get her to start cold but I didn't do that this time. I tried to start her and she refused. I pumped the gas and tried again. Still refused to crank. I could smell gas and when I looked at the carb there was gasoline running from every gasket. I let it sit for another two hours and tried to fire her off again and she wouldn't go. I caught a ride to my friends shop and snatched up a Carter he had sitting around. I cleaned it real good but he told me it had an "idle" problem and was replaced with a Weber. I ran back to the Jeep and put this carb on. Wouldn't crank. Acted like it didn't get any fuel. So I rather quickly rebuilt the original Carter 1 b I pulled off and put it back on. She fired right up but the RPM's were through the roof. I toned the idle down and shot it home. It was at this point that I noticed there was black smoke coming from the exhaust on acceleration. I played a little with the fast idle and she ran fine. All the way up until it stranded me at my soon to be father-in-laws house. Flooded out. It was another very cold day and I seen that the choke was fully closed. I used a screwdriver to weight the linkage and hold open the choke. Started right up. Replaced the air filter and limped home. It kept dying in reverse and at red lights I had to throw it up into Neutral to stay running. I took it to my buds body shop and his mechanic used a vacumm gauge to try to adjust the carb. My thought was "who knows what the PO did to the old carb before I rebuilt it." Well the mechanic couldn't adjust the carb. He said that it was just bad. Period. Odd note. It then began to puff black smoke, then white smoke on acceleration, but only if the air filter was on. Take it off. No smoke. I decided to replace it with a Weber 32/36 DGEV Electric Choke. I put it on the Jeep and it wouldn't stay running unless I feathered the gas. I didn't want to but I set the idle up a little and she seems to idle fine now. I ran it around the neighborhood, real peppy, but. I still have puffs of black and white smoke on acceleration. My friend told me. Its a character of the Jeep. Noooo. It wasnt until the OEM Carter died. I believe there is something that can be fixed, tweaked, what have you. Which will correct this.
I am at a loss. I don't want to sit at red lights puffing black smoke. Also, if its a coolant issue I need to know. I checked the oil and its clean, no coolant there. I gave it a tune up 6 months ago. Plugs, wires, rotor, cap. I gave it a Nutter bypass at the same time. She has a stock intake manifold. Only oil leak I have found, this was recent, was from the gasket under the distributor. I am going to fix this. The timing was just set by the mechanic at 10 BTDC. I heard that 8 (+/- 2) is fine for a Weber with a Nutter bypass.
This is my new baby and I have grand plans for her. Love some help. Also. If "THE MEDIC" reads this. I was following your posts and was interested additionally in the part about helping out with the heater. I like heat. Not a cold guy and anything to boost the heater would be appreciated. I am trying to remember all the questions THE MEDIC had about the vehicle and hope that I have answered most of them.
have the same problem?
Friday, December 13th, 2013 AT 8:20 AM