What kind of carburetor does a Jeep CJ-7 have?
The 4.2L Jeep inline six engine from 1981-90 is an emissions maze. The fuel/spark/Evap systems overlap, including the BBD Carter carburetor with Sole-Vac and a Mixture Control Stepper Motor, the emissions control circuits, the Pulse Air to the catalytic converter and the ECU regulated ignition.
What’s the fuel economy on a 1984 Jeep CJ-7?
Fuel economy as low as 3 mpg, too fast an idle or a very annoying idle surge event that is just aggravating to say the least. My evap canister is leaking at times and not in very good shape I would like to remove it. The catalytic converter has been removed.
How many Jeep 258 carburetors are left in stock?
Only 14 left in stock – order soon. . Only 9 left in stock – order soon. . Only 17 left in stock – order soon. . Only 2 left in stock – order soon. . . Only 19 left in stock – order soon. . . Only 14 left in stock – order soon.
Can a 1991 Jeep CJ-7 be converted to 4.2L?
A 1991-95 Jeep 4.0L donor vehicle would most closely emulate the Mopar EFI conversion. Adapting a 4.0L head to a 4.2L block can be done with some relatively simple port block-off changes to the head that match the 4.2L block. Valvetrain adjustments like valve clearance are also involved.
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.
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.
How to fix idle problem on Jeep 258 Carter?
Remove hoop that holds air cleaner. Remove the two screws holding the choke plate with a 3/16″ socket or small flat blade screw driver depending on what screws you have holding it. Be careful not to drop the screws down the manifold unless you enjoy fishing.
How do you remove choke from Jeep 258 Carter BBD?
If your carb has one, remove the plate on the side that covers the choke linkage so you can access the screw holding the choke rod. It may be necessary to drill out a rivet to get it free. Remove the little snap ring and screw (1/4″ socket) that holds the rod that holds the choke plate and remove the rod.
What kind of OE system does a Jeep CJ-7 use?
You’ll find the Howell system simpler to install and less costly, its backbone is a stock 4.3L GM TBI with adapter to the BBD intake manifold pattern and a GM-type computer. Bill Howell adapted this OE system to the 4.2L Jeep engine with impressive results! Either system uses an ignition distributor.
What is the MCU on a Jeep CJ-7?
The tie-in is the ECU or engine control module, also called the MCU. There are a variety of vacuum and electrical devices in the emissions, spark and carburetor circuits. “Tuning” this engine involves making sure that each of the vacuum circuits is intact and operating properly.