Question about 1991 Nissan 240SX

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My 1991 240sx is jumping time how do i fix it

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You'll most likely need to replace the timing belt and tensioner if it's jumping time, note;;if it's jumping time, does it keep starting? are you sure it's the time thats jumping or is that a guess?most 240's don't just restart after jumping time, they will not restart, unless you adjust the distributor. are you moving the distributor? to make it restart? if the car is just 'jumping' there may be another problem. such as a bad spark plug wire, or a bad plug. also could be a clogged fuel injector. if the car runs at idle byitself, try running fuel injector cleaner through it from the gas tank[recomennd lucas fuel injector cleaner] if not repaired then check for bad spark plug wire, if not that check plugs for a bad spark plug.hope this helps!!

Posted on Nov 11, 2010

  • basicmod May 27, 2011

    just to be clear, the ka24de in the 1991-1998 nissan 240sx uses a timing chain, not a timing belt. There is a very common problem with chain rattle on these engines, caused by the timing chain slapping against the upper guide. Nissan's solution to this problem was to remove the guides.

    As far as jumping time, if you are skipping a tooth on the chain, you have some very serious issues with either tensioners or oil pressure. It is probably a different problem, like described above. The KA24DE has pretty common problems with the TPS as well.

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