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Wont rev past 2000


zman525

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Hi, i currently own a 1972 datsun 240z with 55k original miles. Restoration is in progress and moving fast, however i just ran into a problem. The car will not rev past 2000 rpms, and when it reaches 2k it sputters and runs terribly. I had just replaced the condenser and thought that i may have swapped the distributor rotar 180* off but i didnt. Any suggestions? it ran fine with the previous condenser

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My brother had a problem that was simular in his 95 5.0 mustang. It would rev to 3k and jump to 5k-6k and make no power. It was discovered that a valve spring was broken and a few others were loose or something like that. Check all the valve tran and see if everything looks good.

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Do you notice the lights dim in the car when you have the problem? I had the almost same problem and it turned out to be a bad alternator (Starving the car of spark). Just a suggestion.

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nah the car doesnt dim or anything like that. i think it must have sumthin to do with the timing. I checked the valves and they are mint. I should probably swap the old condesner back in. By the way the new condenser is smaller than my old one, could that be a problem or does it not really matter? Thanks for your responses i hope we figure this problem out.

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LOL i had a similar problem in my 240z after I rebuilt my distributor i was in a rush and didn't set the timing with the gun and thought "she'll be alright" but it just didn't wanna rev and you could smell the burning smell of detonation LOL.

Next day I sorted her out and she drove better than she ever had. :)

FWIW the condensor should say how many uF it's rated at as long as they are the same i don't see a problem. might pay to keep the old one spare in the glove box as you never know.

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