I have a 2003 Pontiac Vibe GT. for the last 2 years I have been having problems with intermittent starts. It seems like when the car is warm, it won't engage the starter and turn over. If I wait an hour or so or give it a push start ( 6 speed manual tranny), it starts fine. I have gone to 3 different GM dealers and have replaced 2 batteries, clutch switch, starter, and starter relay. As it is intermittent, the dealerships always have difficulty replicating the problem. Any ideas what can be done.

SOURCE: Mazda Tribute Intermittent Starting problem

I can think of 2 possibles,it could be a bad battery cable or an intermitent short in the starter solenoid, check or have the battery cables and there connections on both ends first not only are they a cheaper fix but the problem you describe sounds like a current flow issue.Test them with or have them tested with an ohmmeter they should show o ohms resistance,and while not attributed to the problem I do not reccomend using Bosch spark plugs of any variety,the best plugs for any Japanese vehicle are NGK's,this comes from my personal experience with them and other techs that I have worked with.

SOURCE: Begin having intermittent problems with

Your Ignition Relay Is Faulty.
It is located in the Underhood Fusebox.
Consult your manual or the box lid for the exact location.
Please accept this answer to remove it from the work queue.
You have multiple questions for the same problem.
Thanks :D

SOURCE: Car will not start. Battery good, starter good.

When you turn the key, does the starter relay click? Could be the heavy connection from the battery to ground or to the starter solenoid. Make sure these connections as well as the battery terminal connections are clean and tight.

SOURCE: My daugthers 2003 Olds Alero

This sounds like there is a dead spot in your starter. The easiest way to resolve this issue is to replace your starter. Many times, if you take a lot of short-distance trips over the life of your car, the wiring inside the starter itself will wear (short trips means starting it more often, causing a lot of wear over time). Then the inner wiring of the starter wears too much, it forms a "dead spot" -- when the starter is stopped at a very specific spot i will not form the magnetic force needed to torn the starter motor. This is a common issue which can be dealt with for a time if you have to save the money to replace the starter. Tapping the starter, or arcing it with a screwdriver makes the inner workings of the starter jump a little, allowing it to move out of the dead spot and kick over as normal, but it is only a temporary fix. Unless you refurbish electronics for a living, it is very unlikely that you will be able to repair the starter on your own, and such a repair takes some time, so you are better off to replace it than try to repair the starter itself.
As long as the starter does not happen to stop in the dead spot, it will work as normal ... but in time the dead spot will spread, causing the issue to worsen. You can keep forcing it to turn with the two tricks you used until you have had the opportunity to earn the money to replace the starter (or until you have a day off to get the repairs done) .. but over time this can cause more damage to other parts of the car, so I recommend replacing the starter as soon as you can.

SOURCE: 1990 HONDA ACCORD WON'T TURN OVER TO START BUT IT WILL ROLL START. I HAVE CHANGED THE ALTERNATOR AND TESTED THE IGNITION SWITCH STARTER RELAY SEEMS FINE CLUTCH SWITCH SEEMS FINE MAIN RELAY IS FINE

About the only thing you didn't mention was the starter itself. You could have it tested. But before that, try to see if you have power on the small wire to starter solenoid on the starter, when key is held in cranking position. Pull the small wire off and check for power with a multimeter or a testlight while someone holds the key in crank. This is the signal wire from ignition switch that closes the elec. contacts inside solenoid so the starter gets full power from the battery to spin. (This wire also is in the circuit with the clutch switch and the starter relay.) If you have power on this wire in crank, it is very likely the starter is bad. If there is no power, check that circuit out. It is losing power somewhere from switch to starter solenoid. Good luck.