1979 cj7 amc 304 engine power issue - JeepForum.com
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post #1 of 5 Old Yesterday, 10:01 AM Thread Starter
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1979 cj7 amc 304 engine power issue

Hello I have a 1979 cj7 with amc 304 fully stock except the intake manifold and carb which are both edelbrock. So I was driving back home an decided to give her a little rip just before i got to the last road to my house. started from a dead stop going through all 3 gears an I noticed that just before I switch from 2nd to 3rd that it fell on its face at the top end of the 2nd gear didnt really think anything of it until I took it back out the next day an realized that it was down on power. Usually from 1st to going to 2nd I can spin the tires a good bit but when I tried to spin the tires it wouldnt even try if I tried to. It seems to be down on power overall through out the whole rpm range from what I am use to. Also the same day I noticed this issue that the motor had I slight knock but quickly went away after a few seconds an didnt do it again. I check the fluids everything look good. What could have cause the issue?

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post #2 of 5 Old Yesterday, 02:40 PM
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1979 CJ7 
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Might sound crazy but check to make sure the distributor isnt loose and rotating making the timing off.
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post #3 of 5 Old Yesterday, 08:42 PM
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1979 CJ5 
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Location: Steubenville, OH
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Check fuel filter. Was Jeep low on fuel? Might have sucked up some garbage from tank.

Fuel Filter oriented properly - with return outlet to fuel tank on top?

Fuel Pump?

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post #4 of 5 Old Today, 06:44 PM Thread Starter
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Just got done checking fuel filters and fuel lines every looks good. I just replaced the fuel pump about 200 miles ago. Also checked timing while I was checking to see if the distributor came loose the distributor was tight still. I did notice that timing was jumping around a little bit about 3 to 5 degrees. I didnt notice this the last time I timed it about 5 months ago. Is that normal for these motors?
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post #5 of 5 Old Today, 06:49 PM Thread Starter
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Also fuel wasn't low about 50% to 75% full of gas in the gas tank. I also replaced the gas tank 2 months ago so there shouldn't be much if any trash in the gas tank.
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