307 1.4HDi Injector testing

This is the Forum for all your Peugeot Technical Questions, Problems or Advice.

Moderator: RichardW

Post Reply
doctle
Posts: 947
Joined: 16 Oct 2014, 12:17
Location: Meath Ireland
My Cars: 2008 Laguna 1.5 DCi
x 235

307 1.4HDi Injector testing

Post by doctle »

My 307 has a slight misfire at idle. I know this can only get worse I have no access to diagnostic software and doing a leak test isn't an option. Is it possible to unplug one injector at a time until I find the duff one and will doing this do any damage or even work?
Oh buggle
wheeler
Posts: 6847
Joined: 21 Sep 2002, 19:07
Location: United Kingdom
My Cars:
x 717

Re: 307 1.4HDi Injector testing

Post by wheeler »

Not advisable on an HDi injector, if it is a piezo type it can stay open if you unplug it & potentially hydraulic lock the engine.
Why cant you do a leak off check ? You can make a DIY kit with some empty bottles & some washer tubing. Leak off test is by far the best way to test injectors without specialist equipment, a diag tool wont really tell you much about injector condition unless its an electrical fault with it.
User avatar
Paul-R
Donor 2023
Posts: 6916
Joined: 07 May 2009, 16:24
Location: Wirral, NW England; Vaucluse 84, France
Lexia Available: Yes
My Cars: 2015 1.6 Blue HDi 120 Peugeot 308 Active SW
2013 2.0 HDi 163 C5 Exclusive Tourer
2003 2.0 HDi 110 C5 Exclusive Estate (Gone)
2001 2.0 HDi 90 Xsara Estate (Gone)
x 1369

Re: 307 1.4HDi Injector testing

Post by Paul-R »

Does that type of injector have a return fuel system?
As I get older I think a lot about the hereafter - I go into a room and then wonder what I'm here after.

Inside every old person is a young person wondering what the hell happened.

"Trying is the first step towards failure" ~ Homer J Simpson​
doctle
Posts: 947
Joined: 16 Oct 2014, 12:17
Location: Meath Ireland
My Cars: 2008 Laguna 1.5 DCi
x 235

Re: 307 1.4HDi Injector testing

Post by doctle »

Return as in leakoff? yes it looks like the one in the link http://www.ebay.co.uk/itm/Peugeot-1-4-H ... SwiiRZheGy
Oh buggle
doctle
Posts: 947
Joined: 16 Oct 2014, 12:17
Location: Meath Ireland
My Cars: 2008 Laguna 1.5 DCi
x 235

Re: 307 1.4HDi Injector testing

Post by doctle »

wheeler wrote: 29 Aug 2017, 18:16 Not advisable on an HDi injector, if it is a piezo type it can stay open if you unplug it & potentially hydraulic lock the engine.
Why cant you do a leak off check ? You can make a DIY kit with some empty bottles & some washer tubing. Leak off test is by far the best way to test injectors without specialist equipment, a diag tool wont really tell you much about injector condition unless its an electrical fault with it.

I was thinking about making up a kit but I dont have any adapters for the leak off pipe holes on the injectors and I'm not entirely sure how to do it anyway!
Oh buggle
Bick
Posts: 482
Joined: 19 Feb 2006, 17:35
Location:
My Cars:
x 44

Re: 307 1.4HDi Injector testing

Post by Bick »

doctle wrote: 29 Aug 2017, 21:08
wheeler wrote: 29 Aug 2017, 18:16 Not advisable on an HDi injector, if it is a piezo type it can stay open if you unplug it & potentially hydraulic lock the engine.
Why cant you do a leak off check ? You can make a DIY kit with some empty bottles & some washer tubing. Leak off test is by far the best way to test injectors without specialist equipment, a diag tool wont really tell you much about injector condition unless its an electrical fault with it.

I was thinking about making up a kit but I dont have any adapters for the leak off pipe holes on the injectors and I'm not entirely sure how to do it anyway!


I know you are on here for help but i must with your limited ability suggest taking it to a garage, not wishing to upset you in any way but sometimes we have to admit if we cant do things and get help. I can't plaster very well so i get a plasterer to do this for me, just the same as you asking a garage for help, no shame in that.
doctle
Posts: 947
Joined: 16 Oct 2014, 12:17
Location: Meath Ireland
My Cars: 2008 Laguna 1.5 DCi
x 235

Re: 307 1.4HDi Injector testing

Post by doctle »

Bick wrote: 29 Aug 2017, 21:48
doctle wrote: 29 Aug 2017, 21:08
wheeler wrote: 29 Aug 2017, 18:16 Not advisable on an HDi injector, if it is a piezo type it can stay open if you unplug it & potentially hydraulic lock the engine.
Why cant you do a leak off check ? You can make a DIY kit with some empty bottles & some washer tubing. Leak off test is by far the best way to test injectors without specialist equipment, a diag tool wont really tell you much about injector condition unless its an electrical fault with it.

I was thinking about making up a kit but I dont have any adapters for the leak off pipe holes on the injectors and I'm not entirely sure how to do it anyway!


I know you are on here for help but i must with your limited ability suggest taking it to a garage, not wishing to upset you in any way but sometimes we have to admit if we cant do things and get help. I can't plaster very well so i get a plasterer to do this for me, just the same as you asking a garage for help, no shame in that.

I'd normally agree with you however the last guy I approached to change an injector seal on the car quoted €300-500.00. I have done most of the work to this car including the brake discs and pads, windscreen, front and rear wheel bearings, suspension, drop links, engine mounts, injector seal and timing belt. Most of the work is done OCD style and with the help of a Haynes manual however the manual doesn't cover the leak test. I brought it for it's NCT (MOT) this evening and it failed on a ball joint the only items on the front that weren't replaced. I can't afford to pay the local mechanic to do this so it has to be me!
Oh buggle
User avatar
myglaren
Forum Admin Team
Posts: 25362
Joined: 02 Mar 2008, 13:30
Location: Washington
My Cars: Mazda 6
Ooops.
Previously:
2009 Honda Civic :(
C5, C5, Xantia, BX, GS, Visa.
R4, R11TXE, R14, R30TX
x 4888

Re: 307 1.4HDi Injector testing

Post by myglaren »

This is pretty much all that is required - plastic bottles and some plastic tubing normally used for aquarium use.

A slight variation - note that he plugs the return line, which looks like common sense.
The adapters aren't required for your injectors.
doctle
Posts: 947
Joined: 16 Oct 2014, 12:17
Location: Meath Ireland
My Cars: 2008 Laguna 1.5 DCi
x 235

Re: 307 1.4HDi Injector testing

Post by doctle »

Thanks very much Steve that's looking doable. I read somewhere that window washer tube would do none available near me but there is a pet shop! The 7mm tube will fit into the top of the injector? I'm not sure what the little caps are called or where to get them but I watched a video by bodgit and leggit earlier so I'll have to come up with something, maybe a small pipe between every 2 leakoff unions in a loop?
Oh buggle
User avatar
myglaren
Forum Admin Team
Posts: 25362
Joined: 02 Mar 2008, 13:30
Location: Washington
My Cars: Mazda 6
Ooops.
Previously:
2009 Honda Civic :(
C5, C5, Xantia, BX, GS, Visa.
R4, R11TXE, R14, R30TX
x 4888

Re: 307 1.4HDi Injector testing

Post by myglaren »

You should be able to seal the return pipe by clamping it instead of using caps.
Be aware though that the leakoff/return pipes get brittle with the heat of the engine bay and disconnecting them may crack them so having replacements at hand may be wise.
Pet shops are known for charging stupid prices for the pipes, usually cheaper in hardware stores.

That garage guy should have a mask and a sword - ridiculous prices.
I had an iffy injector, paid just over £100 to have a leakoff test done, then the injectors removed, cleaned, one refurbished and refitted with new fire washers and seals at a diesel specialist.

Note that I haven't done a leakoff test myself, just handed it over to my local garage and had it done along with other stuff I am far too indolent to do myself.
The question does crop up here periodically though - I think jrga1 was the last one to do it about six months ago.
doctle
Posts: 947
Joined: 16 Oct 2014, 12:17
Location: Meath Ireland
My Cars: 2008 Laguna 1.5 DCi
x 235

Re: 307 1.4HDi Injector testing

Post by doctle »

Prices are high in Ireland one's wife must drive around in a large 4x4 wearing too much badly applied make-up, pyjamas and sunglasses on damp overcast days whilst dropping little Satchel and Little Prissy the whole 200 yards they must travel to school. I know the return pipes can be brittle I'll have my mate on standby in case I damage them they'd be non returnable I'd imagine and if bought wouldn't be needed, sods law I guess. maybe the motor factors would have pipe or a breaker?
Oh buggle
User avatar
myglaren
Forum Admin Team
Posts: 25362
Joined: 02 Mar 2008, 13:30
Location: Washington
My Cars: Mazda 6
Ooops.
Previously:
2009 Honda Civic :(
C5, C5, Xantia, BX, GS, Visa.
R4, R11TXE, R14, R30TX
x 4888

Re: 307 1.4HDi Injector testing

Post by myglaren »

RichardW
Forum Treasurer
Posts: 10812
Joined: 07 Aug 2002, 17:12
Location: United Kingdom
My Cars: MK2 '17 C4GP 1.6 BlueHDi 120
'13 3008 1.6 HDi GripControl
x 983

Re: 307 1.4HDi Injector testing

Post by RichardW »

'Nuff said on the leak off test - although a slight miss at idle might be the EGR valve - ours (1.6) was a bit lumpy after I fitted a new EGR valve, but it did calm down eventually.

Note for the ball joint you need a (very) deep 41mm socket to get the joint out. You will also need to remove the hub from the car, I suppose in theory you could do it with it on the car, but as there is not enough down movement in the arm to disengage the bottom ball joint you either need to disconnect the strut, or compress the spring. To get the hub nut off you need a 35mm deep socket. On my 307, one joint came out easily, the other was monster tight due to the thread in the hub being poorly formed. I hope yours is the former!!!

Ah, I see you have changed the front wheel bearing already so you know about it, apart from the 41mm socket perhaps. Having had 3 of these fail at around 100k miles, as well as the wheel bearing, I would now do both together as the ball joint is very cheap and easy (ha ha!) to do whilst the hub is already in the vice!
Richard W
doctle
Posts: 947
Joined: 16 Oct 2014, 12:17
Location: Meath Ireland
My Cars: 2008 Laguna 1.5 DCi
x 235

Re: 307 1.4HDi Injector testing

Post by doctle »

I have 42mm 3/4 drive socket and a 1/2 drive torque wrench, I assume gooduntight is the correct torque? I can't get 7mm hose around here I think 7mm is the correct size for the leakoff test? Ebay is my next thought as long as I know the correct size!
Oh buggle
jgra1
(Donor 2021)
Posts: 4625
Joined: 27 Nov 2005, 19:07
Location: Kent / Susssex
My Cars: 2010 C5 X7 2.0 hdi 160 exc auto
MG TF 135
Boxer II 2.2 camper conversion
BMW R1200RT
BMW K1300 R
Honda V F R 800 5thG / MT500 Armstrong
x 39

Re: 307 1.4HDi Injector testing

Post by jgra1 »

hi Doc, yes do the leak off test yourself.. easy peasy.. I used a redundant numberplate as my backing board (anything will do) I bought 4 bottles of water and drank them ! and had some tube lying about .. As Steve says, the final point on Ing#4 can have a bit more tube doubled over and clamped with a zip tie to stop fuel leaking out from that*.. if you want I can send some tube or just send my kit for postage (I would like it back :) ) or just get some tube online and make your kit..

J

* the tube that ran to this injector (or from it) did leak a bit when disconnected, I don't quite know why but didn't spend any time thinking about it.. I blocked it with a 6mm bolt

My leak off may be in the blog linked below, an early pic I would guess,, I havent done anything with blog for ages so apologies to anyone who looked ;)
Post Reply