2002 Hyundai Santa Fe Repair Question
2002 Hyundai Santa Fe Starts and runs for 3 seconds
Is there a sensor that the computer wants information from after the engine has been running for 3 seconds?
Check the fuel pressure and comeback with the pressure readings before we can go somewhere else. I need this information.
I'll get a guage and check it tomorrow. I did check the spark plugs today (they are new ) - black soot on all of them, one of them was gaped too small - reset the gap on all of them. Now the engine will run for exactly 4 seconds. Before regaping the plugs it would run for exactly 3 seconds. Took off the fuel rail with all four injectors - they all have a very nice spray. Bypassed fuel relay to keep the pump running - engine still dies at 4 seconds. Will check pressure next.
Get that done and comeback with the fuel pressures for evaluation that's with and w/o the pressure regulator.
Checked fuel pressure today. Pressure coming out of the pump: 75psi, pressure at the rail is 49 or 50psi - with or with out the vacuum hose plugged into the manifold port.
See below fuel pump specifications
Ok, so the regulator should be keeping the pressure at 37. I'll try and find a new one on Monday. As I understand this, the fuel pressure is too high at the injectors and they are spraying too much fuel into the manifold making the sensors send crazy signals to the computer - then the computer is shutting everything down? And all this stuff takes exactly 3 seconds? (I did get it up to 4 seconds - but now it is back at 3).
Installed new regulator yesterday, pressure at the rail was 43psi - engine would not start. Re-installed original regulator, pressure: 50psi - engine will not start.
It has spark, and it sounds like it will run, but when let the key off of the start position - engine stops.
Sounds like ignition circuit at ignition switch is open-No power to the igniton system-
Check the ignition failure sensor on rear of cylinder head.
Did start today, ran for 3 seconds, one or two times it ran for 4 seconds. Will only actualy start and run 1 in 6 tries.
Checked the wires to the shut off switch:
Pink/Black is 12v with Key ON
Orange has 12v also with the Key On - voltage stays at 12 while the engine is running for 3 seconds - and stays at 12v while/and after the engine dies.
White has .10 with Key ON and 1.5-3v when it does run.
Black is Ground at all times.
Was just thinking, what are the odds that the new crank sensor is a bad one?