How to upgrade ignition on Jeep 258 I-6?
1. Up Grade to the Motorcraft distributor & DuraSpark ignition module, and add the upgrades described above for the Motorcraft distributor. 2. Use an electronic ignition conversion kit for the Delco distributor, and use the DuraSpark or MSD ignition modules, but you will have to go to the aftermarket for adequate distributor caps & rotors.
What do you set your timing to on a jeep?
This is the best method to set timing and tune the carb. Chilton said 8 degeees for my 1990 4.2L with a carb. Lower than 8 seems really, really low. I’d aim for a base timing of 8-10. Remember to readjust the carb idle speed and idle mixture AFTER setting the timing.
Why did my Jeep 258 gain 11 horsepower?
The 11 horsepower gain was probably due to a set of eight working plugs, and the furthering of the break in process. I use mostly Autolite plugs. I have less trouble with them, and have a few less failures out of the box. I also had pretty good experience with Nippon-Denso (spelling) spark plugs.
When did the Jeep 258 engine come out?
The 258 used in ’72-’78 CJs, J-series pickups, and Wagoneers, some used a 1bbl carb and lower compression than later 258s. The 258 was introduced in 1971 as the standard engine in J-series pickups and Wagoneers.
The 258 used in ’72-’78 CJs, J-series pickups, and Wagoneers, some used a 1bbl carb and lower compression than later 258s. The 258 was introduced in 1971 as the standard engine in J-series pickups and Wagoneers.
What kind of spark plug wires do jeeps use?
However, if you were pleased with the factory wires, we also offer direct replacements for just about all types of Jeeps out there. Performance Distributors DUI Livewires for 290c.i., 304c.i., 343c.i., 360c.i. & 390c.i.
What happens when you change spark plug wire?
Changing out those older factory plug wires with higher performing aftermarket ones can provide faster starting times, as well as improved throttle response, better fuel economy and a bit more horsepower thanks to a wider spark plug gap.
Where does the I6 engine in a jeep come from?
The 258 inline 6 (I6) engine always came from the factory carbureted any many people complain about the Carter BBD carburetor and the maze of emmissions vacuum hoses. There are a couple articles below that can help you sort through those hoses and tune the Carter BBD.