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Discussion Starter #1
Hello, new here and wondered if any one could guide me in the right direction?

About a year ago I bought a 2004 2.0 CRDI Santa Fe ,now done just over 100.000 miles, about six months ago it broke down whilst driving but restarted after a few mins , turned out to be the Crank PS, so while I was changing that I decided to change the water pump, cam belt and some other bits as I intend to keep the car for some time. Any way been fine, apart being a bit lumpy on first start up of the day, until yesterday when it would not fire up!
It is turning over fine (strong battery) but just not starting, I have checked if fuel is getting through which it is and the glowplug fuse is fine.
I am now thinking it must be the cam positioning sensor.
Would this cause a problem like this?
Many thanks in advance.
Carl.
 

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Hi Carl,
To my info it just is the camshaft sensor which provides the initial timing for the engine to get started. After that the cranckshaft sensor takes over for keeping the engine running.
So I would certainly check it for function. Maybe you have some crumbled insulation with a shortcircuit at the sensor, not uncommon with older engines.
Otherwise, don't you have CEL (check engine) indicator on? That would indicate you have an error code you could read for diagnostics.
Good luck,
Paul
 

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Discussion Starter #3
Hi Paul03, well thank you for your replie.
Here is an update. I fitted the new cam sensor tonight and the car started straight away. Very pleased.
Should I be aware of anything else that might need changing on a 100,000 miles Santa Fe ? As I said, I intend keeping the car for a fees years so would like to make it reliable.
 

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Hi Carl,
Very good you have it rolling again. Yes, that sensor generally is for startup timing.
The only things for 100.000 miles seems to me the timing belt. Often the waterpump and idler pully and tention pully also are renewed because they are under the cover there and have run the same mileage.
Mine at some 180.000 miles now also is due for in the coming time. I wonder where to get the parts from in my neigbourhood here.
Also you could look into the general stuff like airfilter, oil filter, oil change, fuel filter, brakes, brake fluid, cooling water checkup, gear oil top up, leaks underneath, exhaust piping etc.

Good luck,
Paul
 

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I'm not familiar with that engine - but when changing a belt, also change any pulleys, tensioners or pumps, etc which are driven by the belt - if any one of them fails or wears, the the result is the same - belt failure ( been there, got the T-shirt !)
 

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There are 2 belts, one timing belt to the cams etc. and one additional to the alternator with oilpump and the airco pump.
The latter drives freely in the air, the timing belt is covered so a bit more difficult to get to without taking out the entire engine.
Not much working space at that though.
(seen the horrible pictures)

RT: Suppose you didn't like the T-shirt.

Good luck,
Paul
 

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Discussion Starter #7
Have changed all of the above. Fitting a new timing belt and water pump was a nightmare !
Any way the car has been fine all week until I went to start it last night! Same problem as before, turns over fine, fuel at injectors, good strong battery, glow plug fuse OK but just won't start. Also got quarter tank of fuel. And it is diesel.
Any ideas what could be the problem please?
 

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Discussion Starter #8
So, I have spent all day trying to get my car to start. Have had the hp fuel pump off, every plug cleaned and checked, all seems ok. Sprayed easy start in air filter and it fires up. Runs really smooth and good until the revs drop to below 1000 rpm and if just stops dead. Really odd. Won't start again until I spray more easy start in air filter. Any help would be very appreciated.
 

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Sorry Carl, not much ideas left here, puzzled also.
Maybe then the throttle valve or it's position sensor?
Otherwise, don't know why, the cam position sensor (again?).
Or could it be you have a vacuum issue at the air intake, like loose hoses or the like?

Good luck,
Paul
 

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Discussion Starter #10
Well I got it running with easy start yesterday, it idled perfectly. Turned the engine off and on a number of times all ok. Went to the shop in it , got stuck in traffic, had a fast run in it, all ok. Got home and turned off ok. Went to start it again and just turned over! Hasn't started since( without easy start) and won't idle . So now I have removed all injectors and am going to get them tested.
Will up date soon.
 

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Discussion Starter #11
Latest up date for any one interested.
I took all 4 injectors to a place in Colchester, Essex, that specialise in fuel injectors, they tested all 4 and found three were faulty. That would explain the lumpy running, lack of power and eventually non starting.
They completely overhauled the three and they looked like new when I got them back. Fitted them this evening and the car started almost straight away( air in the fuel line) starts instantly every time now, better than it ever has since I have owned it.
So I would say this has been the main problem all along.
Also removed and cleaned the ERG valve and mass air sensor.
Can't test drive it yet though because I have strated to change the CV joints because the abs ring was broken. Was just going to fit a new ring but the CV joints were so reasonably priced I might as well change them.
Should be a well sorted car once it's on the road again!
 

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Discussion Starter #12
Car been running really well since getting the injectors sorted and changing the cv joints.
Until yesterday when it won't start again!
Really at a dead end now, any suggestions would be appreciated .
 

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Hi Carl,
What a bummer, after 2 weeks running fine it stopped again.
Not much left I think, you did all the works to it.
You now might check for an error code, because the CEL keeps lit when trying to start, so you do not know it maybe is giving a CEL. Maybe you get some info on that.
Or you could try easy start again if it helps to at least get it started.
Then you might get some idea by the way it is running.
You could check your injectors by pulling them out one by one and letting them spray in a little glass jar. A bit of a fiddle to hook them up again outside but then you would see if at least all are working.
Because the engine only needs fuel and a turn of the pistons to get it started (given a correct timing, you could check the connections to cam and cranck sensor.)

Good luck,
Paul
 

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Discussion Starter #14
No error codes showing.
I ordered a new fuel pressure sensor, just before fitting it I tried to start the car and it started!
I fitted the new sensor any way and has been running fine since. I just hope that's the end of the problems now.
But I am not so sure yet.
 

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Discussion Starter #15
A few days later the car wouldn't start. Tried it every day day for a week and the same problem, turns over won't fire up.
Today I went out to try it and it started first turn of the key! Have been using it all day no problems.
Has any one an idea what could be going on?
I am stumped!
 

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Well, a diesel only needs fuel and crancking to start. So it does come to the electrics of fuel pumping and injectors spraying it in.
For that it needs the cam and cranck sensors for timing, pressure sensor to let the pump keep pumping.
You still might check the fuel purge valve at the end of the line. If sticky open it drains the fuel from the line again so no or low pressure, even when pressure sensor asks for fuel and the pump is pumping.
Maybe best to test for actual fuel pressure on the line at startup.
So not much issues are left over to cure it.
Good luck,
Paul
 

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Discussion Starter #17
Thanks for your input.
So today went to start it and back to turning over and not firing, been fine all weekend!
This is what's been done so far.
New crank and cam sensor,
New water pump, timing belt and bearings. No input to starting I know.
All injectors removed , tested and overhauled by a proffesonal company
New fuel pressure sensor
Air filter changed , mass airflow sensor cleaned.
I am now thinking it could be the ECU?
Do they get intermittent faults?
 

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Hi Carl,
ECU's rarely break down. Seen only a few threads about a bad ECU being replaced.
So I would not get high hopes on that curing this. Also major €€€.
First I would check the purge valve. That would be able to produce these kinds of errors.
But for that I would suggest a fuel pressure checkup of the common rail, preferably when the engine fails the startup.

Good luck,
Paul
 

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Discussion Starter #19
When you say the purge valve , is that the ERG valve? I can't find anything relating to a purge valve except the ERG or the DRV that I have replaced.
 

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The purge valve is the valve at the right hand side of the common rail, at the end.
It purges resting fuel from the rail back to the gas tank.
The EGR valve is at the exhaust for recycling (part of) the fumes into the air intake.
It has to be something with fuelnotgetting to the injectors, but you checked the injectors already.
You can check the fuel to the injectors by temporarily taking off the little purge line at the top of each injector.
The left over fuel (not being sprayed into the cylinder) has to come out there and will be guided back to the fuel tank.
If nothing comes out, you do not have fuel pressure for your injectors.
You could check voltage spikes (very short peaks) arriving at the injectors. Take care, it can be upto 80 volts. But I suppose you would need some oscilloscope for that, a normal voltmeter would not see it.

Good luck,
Paul
 
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