s14 with s13 head having running problems AIR LEAK??

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vervedatsun
Posts: 1
Joined: Thu Jul 29, 2010 10:56 pm
Car: 1970 Datsun 510 2 door

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i have a datsun 510 with the ka24de s14 block with s13 head in it.
Car runs and drives... horrible but it does i know its not the timing cause if i go like mid throttle and hold the pedal completely still it gets smooth car never idled and yesterday i moved it and took my foot off to let to let it stall it kept runnnig randomly its like it fixed itself...steady slow throttle is a must when driving.
to start the car i have to have like 1/4 throttle. and if i rev it quick or even try to drive it it falls on its face like it too much air i think i have a serious vaccum leak, when spraying break cleaner by the intake manifold upper part into the head the car spikes reacts to the cleaner tried new donut loookin gaskets for the injectors and new intake manifold gasket with sealer and still same effin results.
What else by the intake would be there to make the car surge and whats up with the idle fixing itself is that a sensor perhaps?
What vaccum lines are so important and close to that area?
I am about to get a new motor because of this it runs strong or at least it would if i can fix this :mad:


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