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EricFromCT
EricFromCT, ASE Certified Technician
Category: Hyundai
Satisfied Customers: 3409
Experience:  ASE Master certified L1, L2, Diesel Certified 16 years experience
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Hyundai Sonata: 2001 hyundai sonata 2.4 engine will start then

Customer Question

2001 hyundai sonata 2.4 engine will start then dies and will not start again
Submitted: 1 year ago.
Category: Hyundai
Expert:  EricFromCT replied 1 year ago.
Hi. Have you done anything to try and fix this yet? Have you verified if you have fuel at the engine?
Customer: replied 1 year ago.
yes
Expert:  EricFromCT replied 1 year ago.
So what are all the things you have done or replaced so far?
Customer: replied 1 year ago.
crankshaft position sensor, camshaft position sensor, fuel pressure regulator, maf sensor, plugs, tps sensor, it is getting fire and getting fuel. 65psi, The car will start and run for 3 seconds and dies and will not start for 10hrs and then do the same thing.
Expert:  EricFromCT replied 1 year ago.
Will the car run if you spray starting fluid into the intake?
Customer: replied 1 year ago.
no
Expert:  EricFromCT replied 1 year ago.
You should probably make sure the injectors are firing. They should have power all the time to one wire of the injector, and the other ground wire gets pulsed to ground by the computer.
Customer: replied 1 year ago.
Tried that, they are firing
Expert:  EricFromCT replied 1 year ago.
Did you check the engines compression?
Customer: replied 1 year ago.
both ground wires are hot when the key is turned on. and yes I checked the engine compression.
Expert:  EricFromCT replied 1 year ago.
what was the compression readings?
Customer: replied 1 year ago.
its been a while since I did that but if I remember correctly they were all high around 145
Expert:  EricFromCT replied 1 year ago.
That is not high. The compression for that engine is supposed to be 175. 30 psi low on all cylinders is not good. You may have a timing belt problem
Customer: replied 1 year ago.
I have it written down somewhere, and we checked the timing belt can I respond tomorrow? I am about to leave.
Customer: replied 1 year ago.
can we continue tomorrow?
Expert:  EricFromCT replied 1 year ago.
yeah
Customer: replied 1 year ago.
When we checked the compression it was around 170, all of them were about the same.
Expert:  EricFromCT replied 1 year ago.
Ok. You should check the exhaust to see if it is plugged solid.
Customer: replied 1 year ago.
checked that and it's good
Expert:  EricFromCT replied 1 year ago.
Ok. Sounds like everything checks good, so I do not think I will be able to tell what is wrong. I will open the question up to other experts. Please do not respond or the question will lock to me. Thanks.

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