Have them do a voltage drop check on both battery cable.
Sometimes it turns over and over but doesn't start. When the starter is engaging the engine it means the starter is doing its job other than the overrunning clutch could be slipping.
Cranks but will not start do below to determine if its fuel or spark problem and get back with us.
Get a carb cleaner and spray into the carb or the throttle body on an EFI. Did it start and die? If not disconnect a sparkplug wire or 2 and ground it to the engine -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel problem, check the fuel pressure to rule out the fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light.
Fuel pump and Injector/s checks out-start checking the ignition system-power to coil, coil/s itself, distributor pick-up, control module, Cam and Crankshaft sensors.
If both fuel and spark is present-check the valve and ignition timing, this will lead you to problems with compression and valves opening and closing at the wrong time
Thursday, April 24th, 2008 AT 5:34 PM