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I have a 2003 Hyundai Tiburon Gt 2.7 v6 6 speed VIN# KMHHN65F13U100010 157k miles that will not start due to not getting power to the fuel pump when I turn the key. The engine cranks and will fire on starter fluid. The car ran fine one no intermittent problems or anything to lead up to this issue. I parked it one day and it sat for maybe a week . I have checked the relays and all are good crank sensor and cam sensors are new, I jumped the fuel pump relay under the hood and the pump kicked on fine. ALSO my obd2 scanner will not communicate with my ECU but the scanner does power on. Every fuse is good and did not have any blown or anything. I did not find any corrosion or breaks during my visual inspection which was pretty extensive throughout the car (i pulled all panels/carpet ect...) I am hoping to eliminate the ECU as the issue. what is the easiest way to eliminate this possibility ? Electrical systems are my weakness to say the least but i do have the basic testing tools. This is not my main vehicle but i really like driving it in the summer and helps keep mileage down on my newer car.
Verify power on FUSE 16 (10 amp), when the key is in the ON or CRANK positions.
ENG CTRL RLY, Pin23, Orange wire should show battery voltage with the key OFF. Turn the key on, and it should, momentarily, turn to ground. Cranking, it should be ground.
"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer." I have learned more by being wrong, than I have by being right.
Check engine light does show on dash with the key on, I did not crank the engine when I jumped the fuel relay cause I was working alone at the time. Normal key ignition no transponder. I will check sensors first and get back asap with what I find out. The ECU will take some time cause Hyundai put it in a very tight spot on this car. Thank you for the quick reply.
5V reference alive at sensors. When I power the pump at the relay (30/87) and the fuel pump runs and fills the fuel rails with fuel. The engine still does not start.
I will add that I did change all 6 injectors back about 4 months ago. not sure if that would cause any issues. I did not drive the car but a few times since I changed them.....
Havent touched the car for months but i went out to try n get my scan tool to connect and i finally did get it to scan, I unhooked my Idle Air Control Valve and my scanner linked up. no codes found, could a shorted IACV cause my computer to shut down my fuel relay?
car does not start with iac unplugged, i get no spark and no fuel. this car is a pita when it comes to the computer with its location, it literally took an hour to just remove one to swap with a known good one. while the ecu is plugged in there is absolutely no room to back probe it. i am now looking for the computer ground in the dash area. The ecu sits under dash right side where you basically have access to only harness plugs that plug into the ecu, no slack at all
