cant get starter to turn motor over! help

[Dane Brown]

Hey guys, i just swapped a motor, drive shaft, transmission from a 1985.5 944N /A into my 1983 N/A. Everything is ready to go BUT i can not get my starter to turn the motor over. I have tried 3 different starters they all work. The battery is good and fullycharged.When i firsttried to start it i got one full rotation of the motor and then it stopped and just made a click noise from the starter. Every time i turned the key it would make ONE click. I then would go turn the motor by hard by tye crank bolt,i very slight turn and i can hear the starter click again. I took the 3 grounds off the back of the motor and cleaned them up, put them back on and this time i got 2 full rotations from the motor and then the starter stopped and clicked. BUT this time when i turn the key it clicks multiple times quickly entail i let off the key. Dose anybody know what this can be or has anybody had this problem before?? Any info is much appreciated.

Thank-Dane

[fiat22turbo]

It sounds like a battery cable issue.

Check and replace the main power wire to the starter and the ground wire from the battery to the chassis. It can't get enough amperage across dirty/corroded wiring from the battery to turn the motor over.

Make sure the battery terminals and cable ends are clean, using a battery terminal cleaning tool. Ensure the cable ends are tightened to the battery and that the cables themselves are not damaged.

[Dane Brown]

Ok ill get on that right now. The cable from the battery to tge starter is just 1 cable directly to the starter? Or is tgere any cutting and splicing of other wires?

[nota]

not on a porsche but on an old dodge slant 6
there was so much gunk on the metal the starter set on it did not ground

[Dane Brown]

Ok i just put a new cable from the battery to the starter and it didnt fix anything. All it did when i turned it over was a loud pop! Then click click click click its a new starter, my 3rd one. Battery is good and fully charged. Grounds are all tight. Is there a starter relay or fuse? This is driving me insane

[Dane Brown]

All the grounds were really corroded. I clean them off and it started up but only for a max of about 5 seconds, if i even touch the gas it cuts out instantly. Any suggestions?

[944 Ecology]

Check all your vacuum lines, especially the 1/2 inch ID one going to the intake manifold.

Also, check your TPS and AFM for good connections.