2009 Elantra 5-speed Won't Start - Hyundai Forums : Hyundai Forum
 
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#1 Old 05-01-2010, 07:42 PM
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PBlackmore
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Love the car, but in the last 2-3 three weeks it just randomly refuses to start. Turns over fine but seems like its not getting fuel. Got some advice that it is most likely a relay that needs replacing. This relay apparently controls the computer and the fuel pump. Guy told me this is a common problem but I see no mention of it here on this forum. Maybe I'm just looking in the wrong place. Any advice, suggestions, redirection would be welcome. I hardly dare drive my car anywhere now for fear It will not start when time to go home.

Problem came to a head this weekend when the dealership was closed. I'll call them most likely on Monday morning to see what they have to say.

In the meantime, I seem to be able to get the faulty relay to function (if that really is the problem here), by making sure lights and radio are turned off, and by turning ignition key just one click (listening to be sure fuel pump has loaded the lines) before actually starting the car. No point in running battery low cranking engine over and over, waiting for that magic moment when the car suddenly starts like there was never any problem at all.

I guess I am trying to avoid some expensive guesswork at the dealership, as they seem to be flummoxed by even such a simple matter as getting me a third "chip key" that actually works in both my doorlocks and ignition. I haven't got much confidence in the dealer I'm afraid, and was willing to buy an online response ($25) to my problem which is supposedly a common occurrence (but not mentioned yet in this forum that I can see)

Thanks

Paul M. Blackmore
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#2 Old 05-13-2012, 07:03 PM
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Quote:
Originally Posted by PBlackmore View Post
Love the car, but in the last 2-3 three weeks it just randomly refuses to start. Turns over fine but seems like its not getting fuel. Got some advice that it is most likely a relay that needs replacing. This relay apparently controls the computer and the fuel pump. Guy told me this is a common problem but I see no mention of it here on this forum. Maybe I'm just looking in the wrong place. Any advice, suggestions, redirection would be welcome. I hardly dare drive my car anywhere now for fear It will not start when time to go home.

Problem came to a head this weekend when the dealership was closed. I'll call them most likely on Monday morning to see what they have to say.

In the meantime, I seem to be able to get the faulty relay to function (if that really is the problem here), by making sure lights and radio are turned off, and by turning ignition key just one click (listening to be sure fuel pump has loaded the lines) before actually starting the car. No point in running battery low cranking engine over and over, waiting for that magic moment when the car suddenly starts like there was never any problem at all.

I guess I am trying to avoid some expensive guesswork at the dealership, as they seem to be flummoxed by even such a simple matter as getting me a third "chip key" that actually works in both my doorlocks and ignition. I haven't got much confidence in the dealer I'm afraid, and was willing to buy an online response ($25) to my problem which is supposedly a common occurrence (but not mentioned yet in this forum that I can see)

Thanks

Paul M. Blackmore
I've got the same problem with my 2009 Elantra with auto transmission.. It stalled on me then it would just crank with no start. When you turn the key on do you see the yellow security indicator light under the red EPS light in the dash? If not then maybe it's a problem with the security system. I then went and locked and unlocked the door with the key directly in the door, instead of using the remote , I cranked the motor and it started right up.Try it and let me know. I'm taking mine to the dealer this week.
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#3 Old 05-13-2012, 11:03 PM
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jeff3820
Go to a professional. You need to see if the computer has any error codes. This will usually show a bad sensor. Other than that, do you have spark? Fuel pressure?
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#4 Old 05-14-2012, 11:04 PM
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A few months ago, I bought my son a used 2008 Elantra - with only 26,000 kms (16,500 miles). Before buying it, it too had problems starting. It would crank and crank but would NOT fire. Then, it would suddenly fire, then run normally - like a brand new vehicle. A few days later, it would do the same "crank and crank but NO fire" issue. After 4 visits to the dealer, they finally found the problem. If wondering, relay was good, fuel regulator pressure was good (after vehicle ran), computer codes were good, 12V to fuel pump wire was good, fuel pump made humming sounds, etc. etc. Long story short, it turned out to be a bad fuel pump - inside its fuel tank. They replaced the fuel pump and its been runnning great ever since. To our surprise, the defective fuel pump was the one they installed in 2010 (after fuel pump recall in 2009). On its 3rd fuel pump replacement, this vehicle has been starting great ever since. I cannot prove it or remember where I read it but do remember reading that Ethonal additive fuel is hard on some electronic fuel pumps. Something about their design and the fuel pump "sticks". Thus, they sound like they are working (re: slight hum noise) but they don't pump fuel.

If our 2008 Elantra's fuel pump blows goes again and OFF factory warranty, I'll probably order another fuel pump assembly from E-Bay and install it myself. I read they are very easy to replace - when replacing the "entire fuel pump assembly" (instead of individual parts inside its assembly container).

If all else fails, do investigate the fuel pump on your Elantras as well. Google search for "Elantra Fuel pump problems" will result is lots of found hits. Way too many search hits...

Hope this helps...

Last edited by Jack99; 05-14-2012 at 11:23 PM.
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#5 Old 05-14-2012, 11:48 PM
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Forgot to meniton... Do investigate the "crank sensor" electronics on your Elanta as well.

If wondering, the "crank sensor" is a mechanical safety switch that determines if your vehicle engine is turning over (moving). Its output wire goes into Fuel Pump Relay switch. Output of this relay goes to fuel pump (located within its gas tank). If the crank sensor is defective (unstable), it won't allow the vehicle's fuel pump relay to work, which won't activate its fuel pump.

What does the crank sensor safety switch do? If the ignition key is ON (within its engine running position) and its engine is NOT turning (crank sensor detects engine is NOT moving), its STOP the fuel pump from pumping fuel down its fuel line. Thus, dramatically reducing the risk of fire under its front hood (especially in a high speed accident). If engine NOT turning over, then NO 12V power to its fuel pump (located inside its engine). When testing fuel pump relay and/or 12V power to the fuel pump, do ensure the ignition key is on its Starter turn position as well. Little trick that some mechanics forget to test - which points to a defective Fuel Pump relay.

Hope this helps as well...

Last edited by Jack99; 05-14-2012 at 11:50 PM.
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#6 Old 10-26-2014, 04:19 PM
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Elantra randomly don't start

I have the same problem with my 2009 Elantra GLS Sport Auto. It randomly don't start, and it seems like it's not getting any gas even tho the fuel pump has cut in. But I did notice the indicator light that shows a yellow car with a key in the middle not lighting up when it don't start up. But when you roll the key back to off and try again, everything starts like there no issue at all. I even took a video of it if anybody want to compare issues.
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#7 Old 10-26-2014, 07:46 PM
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Quote:
Originally Posted by jeff3820 View Post
Go to a professional. You need to see if the computer has any error codes. This will usually show a bad sensor. Other than that, do you have spark? Fuel pressure?
telling someone to go to a professional for a simple code scan is outright insane. a professional is not required to get the codes out of the ECU. rather a simple code scanner (even a cheap one) or some parts stores will stick one on there for free.

the point of forums is to help people out. not tell them to go to a shop. i think the OP can figure that out on his own.

moving on....yes hyundai has had some issues with that particular relay - in multiple vehicles since they use the same one between some models. this was the exact problem i had in my accent and yes it was a devil to track down.

crank sensor IS a possibility as it will prevent the ECU from firing the engine up. this is a safety lockout. without that sensor, the ECU doesn't really know whats going on. it does seem to happen sometimes with these cars that the sensor can be faulty and the ECU doesn't report it. even trying to test the relay can be fun....mine bench tested fine, but didn't want to work when it got a bit of moisture in it.

to keep this short-ish, replacing parts on assumptions is exactly the wrong thing to do. start with the ECU codes (if any) and use that to start narrowing down the problem. think FAS = Fuel, Air, Spark. check you're getting those items properly and then start looking at sensors and relays. something cheap like that relay you might end up replacing as part of your troubleshooting, but i'd only do that once all other possibilities are exhausted.
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