What kind of wire does a jeep 258 I6 use?
Larry Maggio reports he used wires from a ’77-’83 Ford Fairmont with 200 I6 engine and they worked well. The firing order on the 258 is 1-5-3-6-2-4. I used a test light to figure out which wire was the hot on run wire to my Prestolite ignition module. I cut off the old plug and soldered on a wire with a spade connector.
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?
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.
Can a GM HEI distributor on a jeep fire up?
Make sure you hook the hose up to ported vacuum which is high at wide open throttle and low at idle. After the distributor is in and wired up, your Jeep should fire up. If it doesn’t fire up, take a wire off, put a spark plug on the wire, hold the plug to ground and get someone to crank the engine so you can verify there is spark.
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.
Is the Jeep 258 CID I-6 eligible for ignition upgrade?
The Jeep 258 CID I-6 from 1978 to 1990 are eligible for this upgrade. The 258 I-6 from ’78 to ’90 used the same Motorcraft distributor for all variations. The distributor type is one of the most dependable ever released from the factory.
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.
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.