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1986 Jeep Cherokee with 2.8 carbed-won't start
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brokencherokee
New User
Jan 29, 2007, 10:32 PM
Post #1 of 2
(2227 views)
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1986 Jeep Cherokee with 2.8 carbed-won't start
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Help! I pulled the engine out of vehicle because of spun bearing and replaced it with another used long block. I switched a number of parts onto replacement motor, including the distributor.I am afraid I did something wrong because now it won't start. I aligned the two marks on the timing gears when the timing cover was off so I don't think that is the problem. After it wouldn't start, I pulled distributor and rotated crank 360 degrees in case I was on exhaust stroke, and still no change. Is there something I am missing or something else I can try? I am not sure how long this replacement engine sat before I bought it, could it be a case of collapsed lifters? Is this 2.8 sensitive to the exact position of the distributor body in relation to where it was previously positioned? Any help would be great!
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tut2261
User
Jan 29, 2007, 11:28 PM
Post #2 of 2
(2222 views)
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Re: 1986 Jeep Cherokee with 2.8 carbed-won't start
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You could use a timing light to see if the distributor is stabbed right. Use #1 wire and crank it, watch the marks on the crank pulley.
It might help to mark the Top dead center mark on the pulley, it will help you see it. A white paint pen works great.
Other wise you will have to get the engine to top dead center and inspect the location of the rotor ( under the distributor cap) in relation to the position of the #1 wire on the cap. To do so,
1-Mark the body of the distributor with a marker or paint pen strait under the #1 wire's post.
2-Next remove the #1 spark plug, crank the engine over, I recomend turning it over by hand, while holding your finger over the plug hole. When you fell air pushing out, quickly stop cranking, rotate the engine by hand (in the same direction it cranks) to line up the marks between the crank pulley and the pointer on the timing cover. If you turn it by hand more than 1 full turn from when the air starts to rush out you will have to start over. At this time the piston should be at the top. This is top dead center of the compression stroke. Now inspect the location of the rotor, if it is not lined up with your mark on the distributor body, re-stab it to point at your mark. You will still have to set the timing to manufactures specs. It's a very complicated procedure. Good luck!
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