1993 Asuna Sunfire Ignition Problems
Question:
Hello Kevin,
I have a problem with starting my car, which is an asuna sunfire 93. And today I was supposed to check out what was wrong with it, but it was snowing outside. But I asked my dad what was wrong with it, and he said something about the ignition coil. What is that, and how can I repair it?
Sincerely,
Rameses
Answer:
Rameses,
The ignition coil creates high voltage for the spark plugs to fire the fuel and air mixture. Depending on your car, you may have one coil or multiple coils. When you have starting problems, you need to check the three major components your engine needs to run… air, fuel and spark.
Air: Check air filter and throttle body for any obstructions. Also check for loose electrical connections on the throttle position sensor.
Fuel: Make sure fuel filter is not clogged. On a fuel injected car, it’s harder to check for fuel flow since the fuel is at high pressure. I would check spark and if that’s good, then suspect low fuel flow as your problem.
Spark: You can pull a spark plug, reattach the spark plug wire and rest the tip of the spark plug on a metal part of the engine. Have someone crank over the engine and you watch the spark plug to see if you are getting a spark. Don’t touch the spark plug while you are turning over the engine, as you will get a shock if it’s working. They do make a tester for this, so you don’t have to take out the spark plug. You could also using a timing light if you have one to test for current to the plugs, but it will not tell you how strong the spark is. While you are there, take a look at the spark plugs themselves. Are they black and sooty or white. Black and sooty means rich mixture (too much fuel) white mean lean (not enough fuel)
As with working on any car, a good repair manual is invaluable to helping track down issues. The Alldata online manuals have troubleshooting procedures in the book, and is what the professional mechanics use to fix cars in their shops.
Good Luck,
Kevin
P.S. You may have to use Isuzu Impulse as your make and model for your repair manuals, since I am not sure Alldata lists the Asuna