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Greg
Greg, import technician
Category: Hyundai
Satisfied Customers: 6794
Experience:  27 year and 16 year as shop owner, import technician
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I have a5 speed Hyundai Sonata 4 cylinder and the car cranks

Customer Question

I have a5 speed Hyundai Sonata 4 cylinder and the car cranks and starts but shuts off after 3 seconds, starts back up and shuts off again after 3 sec and so on, I replaced the crank sensor and the cam sensor also the timing belt all marks are right, I'm getting spark but no signal to injector
Submitted: 1 year ago.
Category: Hyundai
Expert:  Greg replied 1 year ago.

Hi .

Do you have a good scan tool to check for codes .

But this does look like a immobilizer problem , do you have another key that you can try .

Mostly when a car will restart and die is due to the immo system, because when you open the ignition the command goes though to energize the fuel pump, but when you turn the key to start the immo system can not read your key so it cuts off the fuel pump and

injector feed .

Please check theis then if needed

please get back to me with the reply button, and not the poor or bad service, this way i can get back to you or suggest another expert if needed.

Your deposit does not pay me until the answer is rated in a positive way,
Not rating or a bad rating does not constitute a refund.

If you are not happy or you have sorted out your problem before the answer then please let me know with the reply button .

Kind regards Greg.

Customer: replied 1 year ago.
I tried 3 different keys as well and they all do the same thing
Customer: replied 1 year ago.
I also put a scan tool on it and it reads no codes
Expert:  Greg replied 1 year ago.

Okay you need to get a locksmith out to reprogram the keys ,this can happen where the system fails to read the keyas and need reprogramming .

Or the system has a problem which the local locksmith can hook up his diagnostic scan tool and check what has malfunctioned and repair from there .

Try this site not sure if you have this in your area so this is an example of what you can do .

http://www.hightechlocksmiths.com/

If this does not work you will need to have the car sent into the dealers .

Hope this help and if you need further assistance then please get back to me.

Kindest regards Greg

Customer: replied 1 year ago.
The hyundaui is an 2002 i don't think it needs the keys programmed, I also verified with my locksmiths and they told me the same thing
Expert:  Greg replied 1 year ago.

Using a code reader will not read immo codes .you need a dealer level scan tool for this or a top end GST .

Rgds Greg

Expert:  Greg replied 1 year ago.

Let me double check this for you

Customer: replied 1 year ago.
All grounds have been checked and ecm has been checked as well all test fine,
Expert:  Greg replied 1 year ago.

Yes the SE does not have a chip key ,or do you have the GLS

Customer: replied 1 year ago.
No it is not the gls
Expert:  Greg replied 1 year ago.

Can i get to you tomorrow when i get back into work .there i have the info needed to help you .

Or i can opt out and let another expert help you.

Greg

Customer: replied 1 year ago.
Sure what time, I also own a repair shop and I have all data and Mitchell, I know the fix is something so minor but it's driving me nuts, I'll wait for your text tomorrow, I will be army shop 8:30 am eastern time, thanks and I'll wait for your response
Expert:  Greg replied 1 year ago.

Also on eastern time 20:18 now

Be in my shop at 08:30

Greg

Customer: replied 1 year ago.
Ok so I will here from you morning time I take it thanks again
Expert:  Greg replied 1 year ago.

If you keep your foot on the gas will the engine still stall .

Was there any codes before you replaced the crank and cam sensor .

Try in the morning to keep the engine running with ether ,spray it down the throttle body want to know if you are loosing spark or fuel .

What type of scan tool are you using .

Greg

Customer: replied 1 year ago.
It does stay running with ether but the moment you stop spraying it shuts off, and it does not stay running with your foot down on the pedal
Expert:  Greg replied 1 year ago.

Sorry taking so long we have internet issue here at the moment .

Do you have a scope or what type of scan tool are you using .

What year is this car .better give me the Vin .

Greg

Customer: replied 1 year ago.
03 sonata
Vin# *****
Expert:  Greg replied 1 year ago.

What scan tool are you using

Customer: replied 1 year ago.
Launch
Customer: replied 1 year ago.
I am not getting any codes what so ever
Expert:  Greg replied 1 year ago.

This is looking like a igniter issue have you checked the ignition circuit .

When cranking the engine on the launch go into live data and check engine speed

you should have 250rpm with a good battery .

Crank engine 10 seconds then wait 5 seconds then crank again for 10 seconds do this 3 times then check for codes .

If you are getting rpm on the scanner , then switch on the ignition and start the engine by jumping the starter motor direct .

Let me know what happens

Greg

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