Member Since: 06 Mar 2017
Location: Lost
Posts: 4651
OK so maybe we're getting somewhere now, keep cutting yµ (idµ - eAµ) ψ=mψ
26th Jul 2020 8:46 pm
Discomadness
Member Since: 19 Jan 2015
Location: Caerphilly
Posts: 2256
I’ve found quite a few. Some places retaped with black insulation tape etc. Been chatting to disco Mikey and dean smithson. I think a replacement harness is a good shout at this point.Jarrod
Current : D3 2007 HSE - AKA the lemon
-beanie grille
-detango with led bulbs
-club body off rebuild. TWICE.
26th Jul 2020 9:12 pm
wedgev8
Member Since: 17 May 2019
Location: Kerpen
Posts: 181
Let me understand. After deleting the fault code, how long you can drive the car till the P0193: comes up?
When it comes up without limb mode, is there also no misfire or power loss in this moment?
26th Jul 2020 11:02 pm
Discomadness
Member Since: 19 Jan 2015
Location: Caerphilly
Posts: 2256
It hasn’t come back in 20 miles of driving. No misfire but I’m waiting for the injector to trim in.Jarrod
Current : D3 2007 HSE - AKA the lemon
-beanie grille
-detango with led bulbs
-club body off rebuild. TWICE.
26th Jul 2020 11:11 pm
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4651
Sounds like the harness has been butchered so I agree replacement is advisable. It will likely provide trouble down the road otherwise. yµ (idµ - eAµ) ψ=mψ
26th Jul 2020 11:39 pm
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4651
gstuart wrote:
PROFSR G wrote:
gstuart wrote:
Hiya den
Respect my friend and can I say that lot went over my head
Took a screen shot if that’s ok so can try and read it a few more million times to see if it clicks
Really like learning new things , hats off to u mate as always with ur expertise
It might be about to go over my head too Gary
,
Can I take a guess on this please, so by putting one lead on the negative lead at the battery and the other on the various connections of the fuel pressure sensor are u therefore testing the resistance as it goes from one test probe to the other via the ECM please
Including looking for the canbus 5Vdc signal that comes from the ECM, does that sensor work like a thermistor as in the ohms change as the internal diaphragm changes as pressure changes
Plus , looking for the signal as it goes to the sensor then back to the ECM with the earth signal sharing each side of the wires , so need to ensure wires aren’t touching each other to short
Hope u don’t get a headache with me asking daft questions, lol
Thks as always
Hi Gary,
It's just a case of "suck it and see" really when you don't actually have the car in front of you.
There is of course methodology too but principally you are looking to see if there is any signal leakage, and whether there is sound continuity within the signal wires themselves. The other nono is shared continuity, and there are slightly different methods of testing. I was conscious of Jarrod saying he wasn't great on electrics, so I probably over-described what is a simple process.
He's better with the MM than he gives himself credit for and so hopefully he's on the right road.
If not we'll just have to have another suck! yµ (idµ - eAµ) ψ=mψ
26th Jul 2020 11:58 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13629
Hi den
Many thks and indeed understand where ur coming from
Also starting to make more sense , ref where the ECM looks for a certain amount of voltage from the fuel rail pressure sensor and then what it gets back
Wondering if a new loom is going to be purchased of cutting the 3 x wires near to the ECM and sensor and running 3 x new wires
Unless of course the ECM connector pins are bad causing tracking across them
Plus 1 and totally agree, where’re Jarrod is considerably knowledgeable
27th Jul 2020 2:44 am
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13629
Discomadness wrote:
It hasn’t come back in 20 miles of driving. No misfire but I’m waiting for the injector to trim in.
Jarrod
Just thought and don’t know if u remember , when I retrofitted some heated windscreen washer jets I bought a complete engine loom
So wondering if I lay the loom out and see if the fuel pressure sensor wiring is there , just in case u can’t get that section on it’s own and if it will be any use to u
Of course will need to identify what section u may need
Just a thought
27th Jul 2020 3:04 am
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13629
Just having a quick look , just in case any of the wiring is there , don’t think candy will mind me using her towels, lol
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27th Jul 2020 3:52 am
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13629
Well that’s new, surely it can’t be a Mercedes connector , nah, being on a discovery must of come from a Mc Claren
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27th Jul 2020 6:19 am
Discomadness
Member Since: 19 Jan 2015
Location: Caerphilly
Posts: 2256
gstuart wrote:
Discomadness wrote:
It hasn’t come back in 20 miles of driving. No misfire but I’m waiting for the injector to trim in.
Jarrod
Just thought and don’t know if u remember , when I retrofitted some heated windscreen washer jets I bought a complete engine loom
So wondering if I lay the loom out and see if the fuel pressure sensor wiring is there , just in case u can’t get that section on it’s own and if it will be any use to u
Of course will need to identify what section u may need
Just a thought
Fair play buddy ! There’s not too many around like you. I was hunting for an old cavalier wiring loom to see if I could match the cable colours and sizes to splice some in and stumbled across the bits for the dog ramp I was going to make for you. I feel awful I’d forgotten about it.
I suppose having twins in January has pickled my head somewhat.
Unfortunately the euro 3 harness is very different to the euro 4. Dean smithson is on the case. He’s a breaker in Oxford that specialises in discoveries. I’ve sent him a list of bits, mostly trivial stuff. The pins that hold the engine cover on, noise reducers for the injectors etc to go with the harness. Fingers crossed he’s got a good one bit I’ll be testing it thoroughly before fitting. I believe I’m looking at body off number 3 now Jarrod
Current : D3 2007 HSE - AKA the lemon
-beanie grille
-detango with led bulbs
-club body off rebuild. TWICE.
27th Jul 2020 7:20 am
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4651
Hi Jarrod, can you not cut open the harness and splice it in?yµ (idµ - eAµ) ψ=mψ
27th Jul 2020 8:43 am
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4651
gstuart wrote:
Just having a quick look , just in case any of the wiring is there , don’t think candy will mind me using her towels, lol
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Gary have you been taking bits of the car again?
Or have you been teaching Candy new tricks. yµ (idµ - eAµ) ψ=mψ
27th Jul 2020 9:06 am
Discomadness
Member Since: 19 Jan 2015
Location: Caerphilly
Posts: 2256
PROFSR G wrote:
Hi Jarrod, can you not cut open the harness and splice it in?
I could yes but I realised last night most of the plugs are damaged, the harness is stabbed everywhere. I think starting clean is a good idea now. I have to change the vac pump etc also. It’s only 3hrs to lift the body off anyway lol.
Wondering how best to do a compression test first though. Might butcher an old injector and make up an adaptor.Jarrod
Current : D3 2007 HSE - AKA the lemon
-beanie grille
-detango with led bulbs
-club body off rebuild. TWICE.
27th Jul 2020 9:14 am
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4651
If there's a garage near you with decent diagnostic equipment they can do it for you.
It uses the current draw on the starter to pinpoint a weak compression on specific cylinders.
It works well and shouldn't take more than 10 mins yµ (idµ - eAµ) ψ=mψ
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