Peugeot 307 1.4 hdi starting issue.

[glyndwr1998]

Hi, only bought the car 2 weeks ago, alitle disapointed with it.

OK, eml came on, antipollution on the display, code P0230,car wouldnt start when warm. Found fault to be the primer bulb worn letting air in and diesel leak. Changed return fuel hose harness ?120 .Ok for a week, then today, wont start, eml on Plugged in a snapon diagnostic machine, codes P0233, high pressure regulator curcuit fault. Rail pressure less than minimum.

Reset the error code, tried to start, turned over for an age, then started, and run fine and smooth, no erratic running or smoke. Knocked off, tried to start, wouldnt start. Used diagnostic tool to check readings on live data.
Monitored injection system, noted fuel pressure set point at 305 psi, woulndt start, during cranking. Tried bumping, no joy. Engine rpm during cranking 260 rpm.

Tried to start again, started. Checked readings on pressure rail whilst running, fuel pressure set point 267, pressure in rail 280. Starts every time very quickly. without driving, revved engine over 5000 rpm a few times. Knocked engine off, wouldnt start, checked pressure set point, again 305. turned key on and off a few times, checked rail pressure set point, 267, engine starts no problem.

I am a novice at diagnostics, but am thinking, have i got a fuel rail pressure sensor fault as its parameters are changing, when high, engine wont start, when 267, starts every time very quickly, or fuel pump relay sticking, giving wrong readings. On previous readout from peogeot, cranking spped 250 minimum, so achieving the speed thro the starter motor.

Autodata shows error code p0233 as fuel pump relay circuit intermittant. I am trying to get hold of a lexia and see what that shows, to see if the information for that fault is the same.

Anyone got any ideas as to what i should check first, before i start changing components when they dont need changing.
I downloaded peugeot planet today to see if i cold access the software just to see what eror code p0233 means and a way to rectify, but on loading, needs to be plugged into the lexia tool, which i havent got.

Thanks for you input guys.

Hope someone can help.
I am in south wales, aberdare to be exact.

Best regards, Glyndwr1998

[Liteace]

Have you checked the fuel pressure reg ? its maybe sticking

[Albanais]

Hello mate
Check the priming pump, prime it and if there is no leaks and no bubbles your pipes are in order so the low pressure circuit is okay. So on if this is okay, I mean if no bubbles then an-clip the pipe which one goes to the HP pump and re-clip it again, do the same thing for the other one. And if you still have problems then just change the fuel filter in order to make a good diagnose before changing parts.
Cheers

[glyndwr1998]

Cheers for the replies lads.

Liteace buddy, is the fuel regulator screwed to the pump, i was going to remove that part and clean it today. If not, could you point me in the diection where its located on the 307 1.4 hdi.

I changed the fuel filter last week when i changed the priming bulb and hose assembly complete been as the system was being disturbed.

The revious fault was the low presure circuit low pressure code p03230, this new fault indicates fault in the high pressure regulating curcuit, code p0233.

Thanks again lads, and liteace, if you do know where the reg is located, i would love to know.

Cheers, hope to hear from you soon.

Best regards, glyndwr1998.

[Liteace]

The reg is in the fuel metering unit

[glyndwr1998]

Hi liteace,

Spent all day on the car today, between the MOT and trying to solve this starting issue.
I tried to remove the fuel pressure regulator (or whatever component is fixed to the underside of the fuel pump.) After asking a peugeot tekkie for advice, that part isnt changeable on its own, only comes fixed with a new pump.

They suggested i maybe change the fuel pressure sensor on the end od the fuel high pressure rail, as this does cause my type of problems, and they have changed quite a few on my model of car, the 1.4 hdi.

Is this the same part as your are suggesting liteace buddy.
Apparenty, to get at this, the fuel filter has to be removed to gain access to the rail. Is this right mate.

Thanks for your advice.

Best regards, Anthony.

[ninja123]

hi mate, in my exp, your problem may well be the fuel rail pressure sensor, if faulty and not relaying the 'actual' fuel presure in the rail, the the ecu will not switch the injectors, this is true if the presure is too low or too high.
If the fuel flow regulator is at fault (also common, but not so common as the rail sensor) then a noticable drop in fuel presure on cranking will be seen. This part can also be reffered to as a 3rd pioston de-activator by some diag equipment.
Also, a worn or faulty injector can cause a low fuel rail presure situation, where by the fuel presure delivered to an injector is allowed to leak back via return pipe, thus reducing rail presure.
hope this info helps, regards the ninja

[glyndwr1998]

Thanks ninja,

been looking around, these sensors are about ?120, would you fit a second user one to see if it does clear the fault.

[ninja123]

must be worth a try!
Also, I have found several of these engines (in fords and psa models) where there is still air getting into system.
After further investigation, one of the fuel delivery pipes runs along the cam cover, but not visible until all plastic airbox is removed, and the pipe is covered with some kind of sheating, but remove pipe and cut off sheath and pipe has rubbed through.
I replace pipe with rubber fuel hose and no more probs.
regards the ninja

[glyndwr1998]

Hi again Ninja, i have aleady relaced those pipes last week with a new fuel hose set from peugeot cost ?120, couldnt beleive they could charge for somethig that costs less than a couple of quid to make.

Anyhow, thise have already ben changed, abd thanks again for your input.

Best regards, glyndwr1998

[glyndwr1998]

Hi ninja and liteace, good morning to you both and all on the forum.

Going top change the fuel rail sensor either later thisafternoon or tomorrow, and help and advice on the easiest way to change it.

Have read elsewhere that best access is to remove the starter motor, others advice the removal of the battery and fuel filter to gain acces over the top behind the engine.

Which way would you advice to get the job done,

Many thanks and a merry xmas to you all.

Best regards, glyndwr1998.

[Albanais]

Hi ninja and liteace, good morning to you both and all on the forum.

Going top change the fuel rail sensor either later thisafternoon or tomorrow, and help and advice on the easiest way to change it.

Have read elsewhere that best access is to remove the starter motor, others advice the removal of the battery and fuel filter to gain acces over the top behind the engine.

Which way would you advice to get the job done,

Many thanks and a merry xmas to you all.

Best regards, glyndwr1998.

Hi mate, just one other idea for you,just for information, I'm doing every day citroens and peugeots, so im sure that is not a problem of sensor. If you dont mind take a 5L can put some fuel inside and connect a pipe direct to the fuel filter, prime until you have no more bubbles and start the engine, if you fill a difference, than somewhere on the system you have an air leak or a clogged pipe.
Hope it will help you.
Regards

[glyndwr1998]

Thanks Albanais,

I have changed the fuel pipe harness complete with a new set from peugeot cost ?120 for a few pieces of plastic and a priming bulb . I cannot see any air bubbles in the small clear plastic tube near to the priming bulb, bet previous to the pipe chage, there was a constant passing of bubbles.

I have noticed after using the car alot over the weekend, that the car does start very well now, it now has an issue f cutting out, especially on low revs, ie pulling out of junction, going around slow corner then up alittle hill, sometimes cuts out. If i try to start without knocking the ignition off, will NOT start. However, when after a stall i knock off the ignition, then turn the key, engine starts 1st time very quickly, so something is resetting after ignition off / on sequence.

Thats why i think this is electronic related. I was going to buy a clone lexia but some reports sya they dont work well on a 307 diesel, i could have seen live data anf graphs and posted on here for your expert opinions.

any advice fr my nest step guys.

Thanks

[Albanais]

Exactly, it would not start because of the fault stored on the ECU once switch off and on again you reset the parameters and then you can start the engine, it is not an immo fault. If it cuts and it starts as you explained to me, there are two ways of interpreting the problem: If you are pretty sure that low pressure system is intact, that you clip and un clip the pipes from the pump, the either the o ring on the fuel pressure regulator is damaged either the fuel pressure regulator its self it is damaged. But I still believe that fuel pressure regulator in its self its okay.

[glyndwr1998]

Thanks again Albanais, for your valued advice.

Ok, so you beleive the fuel rail pressure sensor to be ok, but the fault to be in the fuel pressure regulator, and on the 307 1.4 hdi, is a bosch pump, is the pressure regulator the part that is on the botton of the pump?

I tried to remove that part on friday, very hard to get at, but did succeed in getting out the 2 retaining torx bolts, but the part would not come off the pump, still very tight.
I phoned lical peugeot dealer, and spoke to service tech, he said these parts are not available on their own, only come with the pump as a complete unit so he had never removed one to give advice on how tight they are within the housing that are fitted to.

With that info to hand, i replaced the bolts back into the regulator, reconnected the electrical wire, and put everything back together.

Have you changed the regulator, or o ring before on the 1.4 bosch pump unit.....

Thanks for your valued dvice again..

Best regards, Glyndwr1998