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2012 Hyundai Elantra Hard to Start
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Antroda
New User
May 26, 2020, 8:12 PM
Post #1 of 6
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2012 Hyundai Elantra Hard to Start
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Car: 2012 Hyundai Elantra with 1.8l and 88600 miles
I recently bought a used 2012 Elantra after my first impressions were good. No issues with the car running, shifting gears. After buying it this week and probably the third or fourth time starting the vehicle, I noticed that it had a little trouble cranking. At this point, it starts without fail. What I've noticed is that it that sometimes it has takes longer to start when the engine is cooled down, cranking for about 2-5 seconds longer than immediately, when the engine is warm. I changed the spark plugs, coolant, engine air filter, and oil all this week. I checked the battery and it tested good. I think there were a few times it had issues when the engine was warm. But generally, when the engine is cooled down, not cold. It's 60 degrees F outside. I haven't noticed any issues with the vehicle running.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
May 27, 2020, 1:47 AM
Post #2 of 6
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Re: 2012 Hyundai Elantra Hard to Start
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Quote you ">I noticed that it had a little trouble cranking.<"
With just that I still suspect battery isn't "delivering" proper amps to crank this engine might see that in voltage drop test at the battery while cranking when it happens.
Battery testing is still unsure most tests are reading it has reached proper voltage not how powerful it is to turn an engine or "AMPS" required, just FYI on that tid-bit,
T
(This post was edited by Tom Greenleaf on May 27, 2020, 1:49 AM)
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Hammer Time
Ultimate Carjunky
/ Moderator
May 27, 2020, 4:05 AM
Post #3 of 6
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Re: 2012 Hyundai Elantra Hard to Start
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The next time you start it cold try cycling the key from off to on, leaving it on for a few seconds each time, 3 or four times and see if it starts right up after that.
What may be happening is the fuel pump is draining the residual pressure back into the tank and losing it's prime.
If that trick works, then you likely have a bad check valve in the fuel pump.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Antroda
New User
May 28, 2020, 9:27 AM
Post #4 of 6
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Re: 2012 Hyundai Elantra Hard to Start
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So, that test seemed to help in diagnosing, I figured it had to do with the fuel or some energy lowering as the car sat. If not the fuel pump directly, could it possibly be the fuel injectors? I would probably be more successful in diagnosing that myself as of now in the time that I wait to see a mechanic.
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Antroda
New User
May 28, 2020, 9:29 AM
Post #5 of 6
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Re: 2012 Hyundai Elantra Hard to Start
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I took my car to a place where they did free battery testing. At the time, I didn't think about cranking amps, the person only tested the battery as the car was off. The device said the battery was good, but would such device be able to distinguish if the battery had issues delivering power as it started?
In the meantime, I'll just check the battery again.
(This post was edited by Antroda on May 28, 2020, 9:30 AM)
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Tom Greenleaf
Ultimate Carjunky
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May 28, 2020, 9:41 AM
Post #6 of 6
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Re: 2012 Hyundai Elantra Hard to Start
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Here's a way to test if AMPS are up to par for your exact situation + machine with a starter motor. ANTHING:
You can take live voltage at a battery, with a helper watch it drop from just sitting there when starter is cranking an engine of any sort. Usual 12V batteries common to this should read about 12.6 just sitting there but not if you just activated interior lights or other anything right before.
So watch it with a helper cranking the engine how far it drops which it will or your test isn't fast enough need a better voltmeter.
It should never really drop below about 10V with almost never exceptions of extreme cold we know isn't the case.
When engine starts then watch volts climb right back up. You've just acquired more info than a lot of tests would.
If way off test battery itself not out hoop of any U-bolt type connection. No side posts known to me if so I'll ramble on longer how to test those,
T
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