159 1750tbi won't start - Page 2 - Alfa Romeo Forum
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(Post Link) post #26 of 27 Old 30-04-19 Thread Starter
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Originally Posted by JON156VELOCE View Post
By wiggling the earth clamp you might of fixed your issue of a bad connection that can pass enough current for the lights etc but not the much heavier load of the starter motor.
Start with the basics, remove both battery terminals, remember negative off first and on last and clean both the posts and inside the clamps and if nessasary pack out the negative clamp with some short lengths of copper cable so its a tight fit and then remove the 13mm bolt that holds the battery earth to the body and clean up and lightly grease the contact areas.
A high idle is a sign the alternator isnt charging, my 159 did that when the earth cable snapped but check it with a volt meter you should be getting 14v. If its not try the jump lead between the battery negative and engine again and see if it helps.
It turns out you were spot on regarding poor connection to terminal. It happened again yesterday, got back to the car from the office only to find it wouldn't start. Called the RAC and as luck would have it the chap who turned up (very quickly too, thank you RAC) was a former Alfa Master Technician! He took one look and spotted straightaway that the positive terminal had come lose, so while the car could get enough power for dashlights etc, the alternator hadn't been able to pass enough charge into the battery, so it slowly drained to the point where it wouldn't start. Going to follow your advise and build up the battery terminal with copper wire to get a good fit for the connectors - particularly the quick release earth connection, which I suspect was the culprit first time round.
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Copper plumbing pipe also good for this,I did nieces Clio recently on neg terminal. Cut a piece same height as battery post,cut lengthways in 2 then inserted both pieces between post and terminal then tightened the bolt. Nice tight connection now.
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