Consult has arrived!

[richtheracer]

My Consult diagnostic unit has arrived and plugged in and cleared error codes first up!! Cranked and straight away 18 and 22 fuel pressure, disconnected ckp and 47 comes up disconected MAF and 12 comes up so would that rule out ckp and MAF if they only show when disconnected? Here are some pics if anybody can tell me what the guages represent and what the values should be? but remember this isnt running only cranking as no fuel at injectors as this is my problem. Trouble is my budget for sorting this truck were used up straight away buying a new battery and starter for it as both were knackered. For any member who has not read my previous thread it was running but wouldnt idle and would die but would rev up and sounded great. Even drove it but had to keep revs on as its auto and would die!! Ordered and installed new ckp from motor factors but no different so returned as faulty and got a refund as they couldnt source a replacement so have ordered one for nissan but there is now a delay on it arriving and is no return so desperately need to either rule out ckp or be sure this is the problem as I cant afford to lose the £238 I have paid for it. Really is getting to the point of no return with this Terrano as any more being spent on it and I'll have to keep going untill its solved but from what I have learned since having it (4 weeks) is that nothing is reasonable price wise for these trucks!! Anyways have had some great help and suggestion from members Clivvy and Geoffdown but to no avail as yet, have also changed return valve for new on back of pump but that doesnt seem to have been the problem either!! There must be some hope somewhere..lol. Here are pics form ecu talk.
Can anybody tell me where the pressure sensor is in the pump as there is a sensor or solenoind on side with black and yellow wires to it but is a nut and looks like it can be undone but dont want to try anything that drastic yet!!

Sorry for starting another thread but thought it might help now I have had diagnostic on it! :nenau
Cheers Rich..

 

[rayf3262]

Can anybody tell me where the pressure sensor is in the pump as there is a sensor or solenoind on side with black and yellow wires to it but is a nut and looks like it can be undone but dont want to try anything that drastic yet!!

Cheers Rich..

The sensor you are referring to (yellow wire) is the fuel temp. sensor, this plays a fairly minor role in the overall management process.
Some folks deliberately change the fuel temp sensor output to mimic cooler fuel temp., so the ecu provides greater fuelling under normal ambient temps.


There is no pressure sensor.

The only other electrical output from the IP is the control sleeve position indicator.
The ECU commands the control sleeve to a target position in order to achieve the desired timing, this position is verified by the feedback from the control sleeve position indicator. If this feedback information does not happen or lie within tolerance an error code is thrown.
That's why it was suggested to check the IP pressure valve, low internal IP pressure will result in the control sleeve position feedback being off target, although in this case the feedback information is quite correct.
The wiring from the control sleeve PI should be checked, as a flaky connection could easily cause these types of errors.
The sensor electrical parameters should be checked too.
Manual pages EC-380~ cover these checks.

 

[clivvy]

cant rule anything out, untill its running, unfortunately.

have you checked the ignition switch yet???

looking at the gauges, everything seems ok to me, but then again it would until you actually start the car. All the gauges show the correct readings i think...hmmm.....the plot thickens.

 

[richtheracer]

Hi Clivvy ignition switch seems fine turns over with ease if key turned fast or slow!! took cowling off yesterday and looked fine aswell the switch went on my old Mav so kind of know how that feels / sounds etc. I am really losing heart with this and can almost see me scrapping it / selling it. Spent sooo many days on it now phoned countless people etc and really no further forward at all!!

 

[clivvy]

i appreciate how you feel, it is frustrating and youre stuck between a rock and a hard place-fix yourself, pay a garage (a lot) of money to fix or scrap (lose it all).

I just cant fathom, looking at your previous posts, why it wont start. I think if it were the CKP at fault, then the software would detect it, and at the very least it would attempt to turn the engine over when cold. Unless that CKP is totally dead, which is unlikely.

did you confirm fuel is getting from the tank to the pump to the injectors? have you removed the intercooler to check the injectors? Injector number 1 has a sensor on it, have you checked that?

if it helps, ill hook up my laptop to my Maverick, load up the software gauges liek you have, to compare feedback? if we can spot any differences, maybe thats the key? Ill be late home tonight, but ill pop out and hook it up and take a video/pics of it. I feel its worth just a few more shots at fixing-id just be gutted if it turned out to be something simple, and lets face it if its not the fuel pump it probably is something simple....:nenau

also, with the laptop hooked up, when trying to crank it, did any gauges change? when turning the key, ign switch should change, as should a whole load of other gauges....lets see, ill video mine tonight for you, im sure we can get to the bottom of this.

**sorry, just re read the above post from you, you say it DOES turn over, just doesnt start? ok, what about the glow plugs and relay, there is a gauge for that on the software, maybe there is a glow plug fault, or the buzz bar is knackered? im no expert, but i know plenty of folk on here understand the basics of how the car starts, we need their input!!

 

[clivvy]

looking back through your previous posts, unless i have missed, it, i cant see reference to glow plugs.

I can see you had problems with thbattery terminals/cables, so I want to check some things.

* did you replace the positive cable and clamp through to the starter?
* did you check the negative cable?
* did you check the earth straps that lay near the battery-they rub on the inner wing and corrode underneath
* did you check the glow plug relay-light may come on and off, doesnt mean the relay is working properly - thats near the battery....
* did you check glow plugs and buzz bar? as in, check they are working correctly-forget the light on the dash.

it does seem to me that most of the above will be ok, its just that if it isnt, then enough power wont go to the starter AND the ECU. A Bad earth and wiring can cause this. If that is ok, an denough power is getting there, then the glow plugs are next. If they arent working, then there is no heat to set the fuel alight! the sequence just wont fire if they arent working. Maybe one plug is out, maybe all four, maybe its the buzz bar and not enough power is getting there-maybe the buzz bar is cracked.....!!!

Im more inclined now to think that it isnt a pump issue, isnt a sensor issue, im thinking its more a basic mechanical issue such as the plugs/electrical feed etc....!! hey, heres a though, can you actually HEAR the glow plug relay turn on/off? I can hear mine (i have great hearing) and if you cant, then its not working. if you CAN hear it, check it anyway....

 

[clivvy]

have a read through this as well...

http://www.nissan4x4ownersclub.com/forum/showthread.php?t=15735&highlight=engine+start

glow plugs...

 

[makeitfit]

If there's no fuel at the injectors all this electrickery stuff is a little premature isn't it ?:nenau
Back to basics on fuel supply , like crack one or two injector pipes and spin her over for a while. Do you then get juice squirting out ?
CKP etc may upset running but not stop it starting up I don't think.
What about antitheft device ?

 

[cncfabs]

If there's no fuel at the injectors all this electrickery stuff is a little premature isn't it ?:nenau
Back to basics on fuel supply , like crack one or two injector pipes and spin her over for a while. Do you then get juice squirting out ?
CKP etc may upset running but not stop it starting up I don't think.
What about antitheft device ?

I had crank position sensor failure on wifes laguna and it did stop fuel supply,was common rail so may be more technical than terrano but worth checking

 

[richtheracer]

Hi Makeitfit, cracked injectors and flattened battery twice no fuel what so ever at injectors!! not a drop but fuel is in pump and filter primer is hard after 1 press!! Just cant get my head round the fact that it would start and drive but just wouldnt idle but now nothing at all!! Clivvy mate, thanks again for offering to hook yours up and compare, glow plug light goes out after approx 1 second but dont hear it clicking in or out, how do I check the relay and where is it? on one of the dials on diagnostic it displays glow relay going all way round to 1 (max) on dial, also fuel temp at 29 degrees. As far as battery / starter terminal yes had new positive clamp fitted and soldered, negative was removed and checked, and new starter fitted. Can only find one earth that fits onto wing and was corroded so I fitted new connector and repositioned it onto wing after sanding back paint so good earth. Cannot find an earth that would rub on wing though!! had wheel and inner protector off but cannot find any earths there that would rub on inner wing, can anybody guide me on this? The immobiliser light behaves as it should and does not flash when engine is cranking, only problem ive had here was the fact I didnt have a fob as alarm was going off everytime i opened truck with key, but immobiliser light behaved the same as it does now I have a fob for it, only difference is now i'm using fob to open, alarm doesn't go off!! Got my day off tomorrow so gonna have one last crack at it but really dont know what I have left to try!! Apart form number 1 injector but dont have a clue how to check test or remove it so any help here would be great.
Cheers Guys, Rich..

 

[makeitfit]

Wish I could help more but diagnostics not my strong point
I changed my No1 injector but it wasn't bad enough to stop the engine, so too with the ckp. No1 injector is a sort of confirmation sensor I think and if out the ecu uses a default setting but still runs.
There must be some reason there's no fuel passing the pump. Are you sure it's not some sort of security setting ?
Check the manual as it has a pretty good flow chart for problem solving.
Good luck :thumbs

 

[clivvy]

yeah, this is odd, fuel should be getting to the pump and beyond, so it cant be glow plugs-although you should definately hear the relay click on and off regardless of trying to start the car. The gauge on ECU showing the GP relay on 1 is correct, as soon as you turn to ign the glow plugs should start warming up-the light going off after a second is wrong, shoudl be a smidge longer and you will hear a "click". the relay for it is sort of in a recess in the front drivers side inner wing. you have to pull the battery out to get to it. There is a group of relays, its one of them-unplug and check al three it very likely they are rusty/dirty.

the earth cable im on about is again, near the battery. it runs from the inner wing i thin inbbetween the coolant bottle, and the engine block-you can see on the inner wing various holes, then the connection for the main negative wire that goes right through the wing-its next to that-or it should be!!

also, with car IGN on, can you hear anything from the pump at all?? check the connections to the pump-if you look down near the starter motor, you can see another conenction going into the engine block (check that) then furthur forward the pump connectors, there are two, its tight but do-able.

My only confusion is, with tthe CKP. If its dead, i am not 100% sure how it works on these trucks. generally, a car wont start if a ckp is faulty, but as these cars are a mish mash of old design and new, i think the car will start-only badly thats my experience.

have you checked the pipe yet, that goes from the pump to the tank? you can see where it goes into the tank through the drivers rear wheel arche-inbetween the chassis. should be nice and snug in there, then trace it all the way down the side up over the gear box to the engine bay-then check all pipes from that to pump etc, get a nice bright light, there has to be something stopping fuel getting to the pump, or getting from the pump.:nenau

 

[clivvy]

ok, here is a very useful and simple check list, column one, bam.

http://www.dieseljones.co.uk/troubleshoot-a-diesel-engine.html

look at that-CKP, glow plug relay, pump, its all in there and im sure you have checked quite a bit, but not all, of this..!!!

good luck chap.

 

[richtheracer]

Morning Clivvy, thanks again for more info as soon as it stops being wet here I will be out to check see if I can locate this elusive earth wire!! The glow plug light does go out really quickly but 1 second does sound quick but will try and do a more accurate count deffinately no more than a couple of seconds but im sure I heard no click! As far as pump making any noise yes it does, when ignition is turned on before cranking makes what can only be described as a hissing noise is this normal? Have been under car a few times to check fuel pipes but seem fine although in a couple of places there is a bit of corrosion but no signs of diesel. Had clear pipe on filter to see if any air in system but have changed this back to original now as wasnt fuel pipe i was using. Will go and get some clear fuel pipe today and try again. May just change fuel pipe straight through just to eliminate the air scenario if I dont have any more joy today. Fingers crossed.
Rich..

 

[arcascomp]

Haven't reread everything, but have you checked the filter on the pump banjo bolt? Just in case fuel is getting stopped at the last point.

 

[richtheracer]

Hi arcascomp mine has no mini filter, first thing I checked a few weeks ago as had that problem with my maverick.
Cheers Rich

 

[richtheracer]

Also can anybody tell me if their pump hisses when ignition turned on as mine does this and to me dont know if this is right or not?
Cheers Rich..

 

[arcascomp]

Ah well, just wondered if the obvious had been overlooked - wouldn't be the first time I've done that! Does sound like a lack of fuel, oxygen or ignition.

As it was running okay before except for on idle, could you have air flow issues? EGR/Intake manifold gummed up? Something not opening up properly somewhere?

 

[arcascomp]

Never listened, but mine is the older mechanical setup, no fly by wire so I guess it would be different anyway. Will try and have a listen later if poss though.

 

[geoffdown]

Never listened, but mine is the older mechanical setup, no fly by wire so I guess it would be different anyway. Will try and have a listen later if poss though.

Def no point as its a diff pump:thumb2