Oldsmobile/Buick Repair: Auto Trouble, oldsmobile cutlass ciera, 1991 oldsmobile cutlass ciera

Question
drive a 1991 Oldsmobile Cutlass Ciera...I have been having trouble with it for quite some time ...I have had a switched repaired, ect.
Obviously the problem has never been fixed because it keeps on happening.I just got a job offer that is with a place that I'd love to work for but the dang car starts acting up again...
Here's what it does...I'll take it somewhere and it will crank just fine then I'll come back to my car and it won't crank sometimes I mean completely NOT turning over at all and not making a sound when you turn the key...com back an hour later and it cranks...It's not thought to be the battery because the battery tested fine....It starts up ok when it does start up sometime it just kinda starts like its hesitating then turns over all the way...The starter was tested to not too long ago and said to be ok.I am so tired of taking it in for erroneous repairs that never fix the problem and it couldn't start acting up at a worse time since this would be my ideal job and were in the poorhouse literally.Can you please help?

Answer
hi unhappy.well if it is not the battery and not the starter.then it has to be the cables.now the cables run pos.from the batt to the starter solonoid which is bolted on top of starter.this cable must be clean and tight.now the ground cable or neg cable runs from the batt to the eng block normally to the bellhousing of the trans.this cable must also be tight and clean.if they are both tight and clean.the only thing it can be is the starter cylinoid.and if this were the case the starter would test ok.this is the hardest type of elec prob to diagnose because it is intermittant and probably never happens to your mech.i really hope this helps and if not get back with me we will figure it out.and please take time to vote or rate my help as we recieve only small recognition for this service  billy mac