2000 Hyundai Elantra Won't start on first crank

Tiny
WF1PBRI1
  • MEMBER
  • 2000 HYUNDAI ELANTRA
  • 4 CYL
  • FWD
  • MANUAL
  • 285,000 MILES
6 years ago, I ran out of gas. Ever since it takes 3-5 seconds of cranking to start. Now it is getting worse and I have to stop cranking and try again. It will usually start on 2nd crank but occasionaly will start dieseling and I have to shut it off and the 3rd crank starts right up. I have replaced the fuel filter, fuel pump, spark plugs, spark plug wires, and air filter. Just recently I got a check engine light and the code indicated a cylinder 4 misfire. Mechanic replaced the coil, plugs, and wires and it is back to 2-3 cranks before it starts but does seem to continue to get worse.
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Wednesday, August 18th, 2010 AT 9:52 PM

7 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
Have you checked fuel pump pressure? Is sounds like there is bleed off and it takes a second for it to build. I realize you replaced the pump, but there still could be a restriction.

Let me know.

Joe
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Wednesday, August 18th, 2010 AT 10:53 PM
Tiny
WF1PBRI1
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Hi Joe,
I hooked up a fuel pressure gage and with the engine running it is 36 psi and when I disconnect the regulator vacume line it goes to 44 psi which is spec. However, when I shut the engine off, it goes to 0 in about 3 seconds. The Haynes manual I have said that this condition is a defective check valve in the fuel pump and to replace the pump. In that this was the reason I replaced the pump in the first place and when I did replace it, it made no difference; I am hard pressed to believe that replacing it again will fix it this time and I would rather not spend another $140 unless I can know for certain it will fix it. I checked all the lines and did not find any kind of a fuel leak all the way back to the gas tank. Any suggestions on what to test would be appreciated.
Thanks
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Saturday, August 21st, 2010 AT 11:23 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Turn the key on so it builds pressure and pinch off the rubber hose coming from the pump. Shut the key and see if the pressure holds. If it still drops, then you have a bad regulator or leaking injector. If it doesn't drop, you either have a leak or it's the pump.
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Sunday, August 22nd, 2010 AT 9:51 PM
Tiny
WF1PBRI1
  • MEMBER
Hello, I did the line pinch test and the pressure held for 10 minutes before I released it so the problem appears to be a fuel injector or the regulator. Is there a way to test the regulator to see if it is the problem before I have to oull the injectors? Thanks for your help.
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Monday, August 23rd, 2010 AT 11:16 AM
Tiny
JACOBANDNICKOLAS
  • EXPERT
If it held pressure, the regulator and injectors are fine. Chances are the check valve in the fuel pump is bad.
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Monday, August 23rd, 2010 AT 10:53 PM
Tiny
WF1PBRI1
  • MEMBER
The problem is fixed so I thought I would add this to this chain. When I blocked the fuel return line and cranked the engine, it started to drop pressuer when I first turned it off but then it held it at 30psi and continued to hold it at 30psi until I bled off the pressure after 10 minutes. This told me that the fuel injectors were not leaking or else it would have bled off immediatly so the problem appears to be the fuel pressure reulator leaking fuel back to the tank on engine shutoff. I ordered the part, but before I could get it installed, the engine now starts right up like it is supposed to and I have not had any more problems with it. If it gets worse, I will replace the regulator but for now if it ain't broke, I ain't fixxing it. Thanks for pointing me in the right direction. This is an awesome website!
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Tuesday, August 31st, 2010 AT 7:46 AM
Tiny
JACOBANDNICKOLAS
  • EXPERT
I'm glad you it is running good now. Like you said, if it isn't broken, don't fix it.

Take care and thanks for using 2carpros. Com.

Joe
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Wednesday, September 1st, 2010 AT 8:03 AM

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