HDI won't start

[smith]

Hi

My HDI won't start, moved it to wash it went to move it back no go. The engine keeps turning over. Its the first time I have had any problems with it. I have plugged it into a computer to check the diagnostics but the computer is unable to get access to the system. I have checked everything I can think of, diesel pumps, fuses, no water has got in anywhere. Anyone have any ideas? I'm thinking it might need a new ecu?

[lolsteve]

Imobilizer? When mine crashes the engine will crank but it doesn't inject any fuel

[smith]

Sorry should have said, yea checked the immobilizer. Got it running for a second with easy start then died again.

[Poodle]

I have exactly this problem, yet to be solved. I sent my ECU off to the ECU doctor and it made feck all difference, whether that means it's something else at fault or the ECU doctor is a rip-off merchant i'm yet to decide. Try the engine loom first, mainly because it's a damn sight cheaper to get than a new ECU. Have you definitely got all the required sensor signals? FRPS, cam, crank, etc?

[smith]

Everything looks to be fine in the dash, car just won't start. Computer can't connect to the ecu to read any codes, so I can't find out about the sensors. I assume all the sensors are there, this is the first problem I have had with it so have never really had to have a proper look in it. You have ideas whats wrong with yours?

[Poodle]

As stated above, the prime candidates are the cam, crank and frp sensors, or possibly the engine loom or ECU. If the sensors weren't there the car would never have worked in the first place, my question was about you checking the signals. You don't have to use a diagnostics program, you can check their signals with a multi-meter, you can do the same to check the engine loom is still in working condition. Boring and time-consuming, but better that than splash out on a new ECU only to find that wasn't the problem.

Which diagnostic software have you been using on the lappy? Are you using a PP2k or a generic reader like one of the £15 ELM327 clones?

[dturbo ash]

mine the same but ther no fuel come out the hp pump how do i check the immobilizer

[Poodle]

Don't know i'm afraid matey, if i knew that i wouldn't still be so stuck with mine lol.

[Mr Whippy]

mine the same but ther no fuel come out the hp pump how do i check the immobilizer

The immobiliser just means the injectors don't get their firing signals.

The HP pump is directly connected to the crank and so runs whenever you try start, and so fuel should run from it into the rail and then return back to the tank.

Is your tank pump dead?

If not then maybe the rail relief valve is a bit iffy?

Dave

[dturbo ash]

wher is the rail felief valve wood this stop fuel come out the hp pump

[Poodle]

Yes it would. It's on the opposite end of your HP pump to the cambelt, held in by two torx head screws. You'll find it a lot easier to remove if you whip of the fuel filter housing and bracket. Take the FPR off and give it a blast through with some WD40 or something similar, carb cleaner seems to be popular.

[Mr Whippy]

Just reading this again.

Your car worked fine, then you moved it and washed it, then it didn't work fine.

Has water got onto a multi-plug connection and/or blown a fuse somewhere? Maybe leave the car with the bonnet up pointing at the sun... maybe something got wet?

A mate had a van with EDC15C2 (PSA) and it rained hard one night and the next time he went to use it it didn't start, but upon removing his ECU it was quite wet/damp so clearly got water on/in it...

Some HDi's have bags over the ECU, some have it open... not sure if the bag was standard but it makes sense to protect it from water/damp.


Hmmmm, try unplug ECU, spray contact cleaner in there (repels water/damp), then re-plug and see what happens.

Dave

[smith]

As stated above, the prime candidates are the cam, crank and frp sensors, or possibly the engine loom or ECU. If the sensors weren't there the car would never have worked in the first place, my question was about you checking the signals. You don't have to use a diagnostics program, you can check their signals with a multi-meter, you can do the same to check the engine loom is still in working condition. Boring and time-consuming, but better that than splash out on a new ECU only to find that wasn't the problem.

Which diagnostic software have you been using on the lappy? Are you using a PP2k or a generic reader like one of the £15 ELM327 clones?

Sorry I haven't got back to this in a few days. Think it was universal, was just a local garage a non specialist. So I brought to a Peugeot dealer, they got the same response from the car and are suggesting replacing the ecu. Not worth putting a new one in.

---

RE: HDI won't start
Just reading this again.

Your car worked fine, then you moved it and washed it, then it didn't work fine.

Has water got onto a multi-plug connection and/or blown a fuse somewhere? Maybe leave the car with the bonnet up pointing at the sun... maybe something got wet?

A mate had a van with EDC15C2 (PSA) and it rained hard one night and the next time he went to use it it didn't start, but upon removing his ECU it was quite wet/damp so clearly got water on/in it...

Some HDi's have bags over the ECU, some have it open... not sure if the bag was standard but it makes sense to protect it from water/damp.


Hmmmm, try unplug ECU, spray contact cleaner in there (repels water/damp), then re-plug and see what happens.

Dave
gowhippy.com

Yea thats exactly what happened. No nothing got wet checked it afterwards. My Ecu is covered by the bag, no blown fuses anywhere. Looking for a second-hand one to put in and sees if that works.

[Poodle]

Ah i see, if a peugeot garage cant read it then youve really got a problem. Still a chance it could be the loom, can tell by checking the relevant circuits for resistance with a multimeter. Also worth noting you can get a second hand ecu along with the required immob bits for as little as 200 quid.

If youre not doing the work yourself it may not be worth it though....

[smith]

Yea I know, they're quoting around a grand to replace it. Going to try it myself, just afraid of locking the ecu.

[Poodle]

Youd be hard pushed to ruin an ecu just by fitting it, short of dropping it across the battery terminals lol. Whee are you based? There may be a locao member or two that can help you out.

[smith]

Not ruin it, lock so that it can be used in my car. I have read somewhere, when putting in an ecu there is some wires that have to be cut to disable the immobilizer in the car so that it will work with a different ecu unit without changing the transponder chips

[Jonny81191]

that's why you change the lot...

[smith]

Hi Jonny,
Do you know if its much hassle to swap it all over from a donor car? What all would it involve?

[vlj]

Hi Jonny,
Do you know if its much hassle to swap it all over from a donor car? What all would it involve?

If I've read this right you'll want to take the loom from the donor car and swap it over, then on the ignition wiring you'll have a black transponder that fits around the ignition barrel. Take this off of your loom and attach it to the new one otherwise you won't get far. You can test the loom without having to wire the whole thing in properly - just attach the ignition, the dials and the earth by the accelerator pedal and you should be able to fire her up.

[Poodle]

You mean unlocking, to unlock the ECU requires some internal changes to the unit afaik, not a cheap option.

[Jukie88]

Mine didn't start like this checked everything glowplugs fuel pumps immobiliser all ok, one day I thought f*ck it whilst I've got everything off and undone I'll charge the battery it had charge but plugged it In Any way and boom5 hours later plugged it back in car started first time haven't had any issues since :-)

[Poodle]

They can be funny about battery voltage, wont fire unless the engine's cranking above a certain speed. Thats a good point actually, its worth checking all your earths are ok too.

[Jukie88]

Mines just started doing this again yesterday :-( tried two batteries no luck where abouts are the earth Leeds ?? Any pics would be much appreciated ???

[smith]

Hi all,

Bought a secondhand ecu online and put it in, car started first time.

[Poodle]

Congratulations fella, you've solved that remarkably quickly, you have no idea how lucky you are lol.

[Jukie88]

Mines still a non runner so it's going to garage Friday I'm out of ideas although I haven't fine down the Ecu route yet so it May be that :-(

[Mr Whippy]

Hi all,

Bought a secondhand ecu online and put it in, car started first time.

So the ECU became dead in some way during washing... hmmm...



Glad it's fixed

Dave

[Jukie88]

Mine was the brown relay gave it another clean and a wiggle and voila !!!