Why does my Jeep Wrangler run rich at idle?
Between the 258 in my ’81 CJ-7 and a couple friends that have 258 equipped Wranglers, I have fixed this problem half a dozen times and the cause of the problem has always been the same. The problem has always been caused by clogged idle tubes that cause fuel to drip out of the venturis and make the Jeep run rich at idle.
Why does my Jeep Wrangler stall when I slow down?
Jeep Cj-7’s and early wrangler YJ’s with 4.2 liter engines came with a rather lowsy carter bbd carburetor which of goes out fo adjustment. One of the most common problems with this carburetor is an erratic idle; in extreme cases (as it was with my jeep) the vehicle will stall every time you slow down or stop.
What are the symptoms of a bad idle control valve?
$0.00 1 Irregular idle speed One of the most common symptoms commonly associated with a problematic idle air control valve is irregular idle speed. 2 Check Engine Light comes on Another symptom of a potential issue with the idle control valve is an illuminated Check Engine Light. 3 Engine stalling
What causes the idle speed to go up or down?
The idle air control valve is programmed to regulate and maintain the engine idle speed at a constant rate. If the valve fails or has any issues it can cause the idle speed to be thrown off. This may result in an unusually high or low idle speed, or in some cases a surging idle speed that repeatedly climbs and falls. 2. Check Engine Light comes on
Between the 258 in my ’81 CJ-7 and a couple friends that have 258 equipped Wranglers, I have fixed this problem half a dozen times and the cause of the problem has always been the same. The problem has always been caused by clogged idle tubes that cause fuel to drip out of the venturis and make the Jeep run rich at idle.
Jeep Cj-7’s and early wrangler YJ’s with 4.2 liter engines came with a rather lowsy carter bbd carburetor which of goes out fo adjustment. One of the most common problems with this carburetor is an erratic idle; in extreme cases (as it was with my jeep) the vehicle will stall every time you slow down or stop.
How to fix idle problem on Jeep 258 Carter BBD?
Put the cleaned out venturi cluster back with the two gaskets and two screws. Replace the choke rod with snap ring and screw and replace the choke plate. Make sure all the screws are tight that hold together the carb body at this time.
What kind of carburetor does a jeep 258 have?
Fixing the problem is relatively easy and once you get past this problem, you will get much more enjoyment from the 258 and the Carter BBD carburetor. The Carter BBD is a two barrel carburetor that was available on late 70s to late 80s Jeeps with the 4.2L engine.
Fixing the problem is relatively easy and once you get past this problem, you will get much more enjoyment from the 258 and the Carter BBD carburetor. The Carter BBD is a two barrel carburetor that was available on late 70s to late 80s Jeeps with the 4.2L engine.
What to do about idle problem on Jeep 258 BBD?
Replace the choke rod with snap ring and screw and replace the choke plate. Make sure all the screws are tight that hold together the carb body at this time. Often the screws will loosen up and dirt will be sucked into the carb. Replace the plate covering the choke linkage with a sheet metal screw, or leave it off.
What causes fuel to drip from the nozzles at idle?
If your idle tubes are badly clogged, you will see fuel dripping from the nozzles at idle (if your Jeep will idle at all.) If you don’t see fuel dripping, but your idle is still poor, open the throttle a bit with your hand or have a friend hit the accelerator. You should see two even streams of fuel and no dripping from the nozzles.
What causes Jeep 258 bbd to run rich at idle?
The problem has always been caused by clogged idle tubes that cause fuel to drip out of the venturis and make the Jeep run rich at idle. Fixing the problem is relatively easy and once you get past this problem, you will get much more enjoyment from the 258 and the Carter BBD carburetor.
How to fix idle problem on Jeep 258 Carter?
The advantage of this approach is you can make sure there isn’t a lot of junk in the bowls, you can check your float adjustment, etc. It also may help if you have power brakes because the master cylinder may be in the way of getting the choke rod out.
What causes Jeep 258 Carter BBD to stall at idle?
The symptoms of the problem include stumbling and sputtering at idle. In advanced cases, the Jeep will stall at every stop sign and will only run at high RPMs. Gas mileage will suffer since fuel will just be sloshing out at idle.
What causes low engine RPMs on a Jeep Wrangler?
Low engine RPM’s and high carbon deposits are associated with short trip driving where the vehicle engine is not allowed to fully warm to normal engine operating temperatures.
The symptoms of the problem include stumbling and sputtering at idle. In advanced cases, the Jeep will stall at every stop sign and will only run at high RPMs. Gas mileage will suffer since fuel will just be sloshing out at idle.
Is there a problem with the Jeep 258 BBD?
The most common problem I see with the engine is it’s inability to idle. Between the 258 in my ’81 CJ-7 and a couple friends that have 258 equipped Wranglers, I have fixed this problem half a dozen times and the cause of the problem has always been the same.