Wont rev past 2000

[zman525]

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

[dogma420]

try the previous one and see what happens...not out of the question to have a doa one.

[VaGuS510]

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.

[Jayru]

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.

[zman525]

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.

[zman525]

ok, well swappin the old condenser back on didnt do anything, and its still not reving past 2000. Any suggestions? im lost now =(

[PrOxLaMuS©]

i had the same problem but I was running wayy too rich.. so I leaned it out some.. works fine now

[e_racer1999]

what will it do when it reaches 2K? does it sputter or does it sound like a rev limiter?

[zman525]

problem solved guys, the timing was off and its all right now... thing runs really nice now, thanks for the help guys

[e_racer1999]

no prob! good job!

[dogma420]

Glad to hear it was an easy fix! now finish it so you can drive it!

[Gav240z]

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 .

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.