My 2001 hyundai santafe won't start. I scaned it and had this code, P0340, Camshaft Position sensor mulfunction. I have replaced the sensor, but still won't start. And there is no power suply to the injectors. what shd i do?
First of all, when you start, will it turn over at all or not? You say you have no power to the injectors. How did you verify this? If so, it's possible your fuel system fuse is burnt out. The fuel pump relay powers only the fuel pump. A separate relay and fuse take care of the injection system itself. Check those also. Until you know more about what the cam is doing, though, you might want to check it thoroughly. Also, just getting compression in one cylinder is not a verification of whether the cam is turning. There are bound to be more than one cylinder that will still build compression even if the cam is stopped. You might need to check more than one cylinder, or go as far as to do a compression test.
So, did you ever actually check the relays and fuses for the fuel system?
Just to reiterate:
There are pretty much only TWO possible reasons why your injectors are not spraying fuel
Either the power to the injectors themselves is out (which again has nothing to do with the fuel pump relay. That relay strictly runs the pump, and not the rest of the injection system) which would be either the fuel SYSTEM relay or the fuel SYSTEM fuse.
The only other possibility is that all of your injectors went bad at precisely the same moment, or they all became plugged at precisely the same moment, or you have a massive blockage of the fuel line just at the points where the lines enter each injector.
I'm guessing odds on all of them going bad at once are pretty slim. Also, really unlikely the blockage.
The final likelihood is that you have a broken wire in the harness that powers the injectors, or maybe the connector which plugs into them is corroded. There really aren't any other likely reasons that your injectors would be getting fuel, under pressure, but not actually injecting it into the cylinders.
As for testing the camshaft position sensor, I haven't had any luck at all finding a manual test you can do. One final thought ... have you raised the back end of the vehicle recently or had it towed?
Many vehicles, even some of the newest, have a fuel supply cut off switch which is activated when the vehicle is raised in the rear or front past a certain height. It's not as common on the newer vehicles, but the purpose of it was to prevent the vehicle being started in the event that someone tried to steal a car by towing, as well as being a safety feature to prevent the vehicle accidentally starting or dumping fuel in the event that the key was left in the run position. I'll do some checking to see if the santa fe is equipped with such a feature. In the meantime, check your owner manual to see. If so, it's possible that your initial problem might not be what is preventing it from getting fuel to the injectors.
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The engine turns alright, diesel fuel comes up to the injectors with pressure. but is like the injector does not open to spray into the chamber.There is compression in all the cylinders. the cam turns. I want to ask is there any way i can test the cam and crankshft sensors manuelly? I am using a LAUNCH X431 Diagnostic tool.Will I be able to test this sensors with that?
The timing belt was actually the first item i checked. it is intact, the camshaft turns alright,n and there is compression.I gave it direct fuel from through the inlet manifold and it started for some seconds. diesel comes up to the injectors but does not spray.
Yes the Vehicle stoped on the road and did not start again so we had to towed it to the garage.
Make sure cam is actually turning when cranking. Could be broken Timing belt/chain. Look into eng. with oil cap off if possible and watch for movement in rockers/valve train. Or remove one easily reached spark plug, and have someone crank while you hold your thumb over the hole. Is there air pumping past your thumb? Let us know. TT
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