When I start my '98 Millenia in the mornings, only, 50 percent of the time there is a rasping/rattling sound that is somewhat loud, but goes away quickly. It always starts right up, and the rest of the day it will start with no noise. Is this an early warning sign of some sort?
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The alternator might be shot. It is what charges the battery and keeps the engine running while the car is on. There are many other things it could be, though. How does it sound? Does it slowly die, or suddenly cut out? Does it always start easily, or is it getting harder to turn over each time you start it?
If it sounds like the engine is coughing or rasping through a dry throat while cranking, it could be that the timing belt broke. If this happens, the valves will be out of time and you will not get any compression in the cylinders. Air leaking past half open valves caused the weird rasping sound. This is why the engine cannot start. A cylinder compression test will confirm this. A mechanic with a compression gauge can perform this test where your car is sitting. You need not take it to a shop for the compression test. However, if the test indicates no compression in multiple cylinders, the timing belt is broken and the car will need to be towed.
Possible. It's hard to give you an accurate cause, since I'm not able
to hear the sound. Most of the time, when you hear a slight wrapping
sound, it's a rod bearing,or crank bearing. When the rod bearing goes,
you'll know it,since it will knock like an SOB.
check your starter and see if it is loose, this will cause it (starter) to use more amperage to start which leaves less amperage for the rest of the electrical system (maybe the long start problem too), hope this helps, let me know
Could be carbon build-up on the pistons, causing erratic flame travel in the combustion chamber... 'pinging'...... Decarbon the engine and use a high grade fuel for a few tanks.... also an octane booster can help