clio non start

[ninja123]

I have a 2002 1.2 8 valve clio that wont start - there is a very weak signal from ecu to coil pack, but strong pulse to injectors, I have replaced coil pack, checked continuity of wiring from ecu to coil, cloned sirius 32N ecu to another ecu, but still the same - am I missing something here?? Any one had this fault before?

ninja

[genius76]

but still the same - am I missing something here??

Yes mate u missed this one answer http://www.digital-kaos.co.uk/forums/f152/help-bleeding-easytroice-gearbox-astra-h-2004-a-404142/#post2244148
:)

[racin-snake]

is it the earthing to ecu or 12v feed mate ?

from ecu the two earths switch to trigger the coils test both volt drop if possible also test feed on 12v from the fuse box sometimes wiring there corrodes what fault codes you getting ?

[mowgli5381]

As above says, check the lives at the fuse box, if you follow them back they are all crimped into a big bunch thats crimped to a heavier gauge cable, these joints are a bloody plague on them.

[cactikid]

so it wont be a faulty cranksensor then,ahh oxidised connections.

[racin-snake]

seen one which someone else had had a probe about on the terminals on the coil were splayed

probably by someone sticking a test light into the connectors from the front and opening the female connectors causing shyte contact

[ninja123]

I have put 12v and earth direct to ecu and still the same :(

Cant be crank sensor as injection pulse is perfect.

ninja

[ninja123]

Yes mate u missed this one answer http://www.digital-kaos.co.uk/forums/f152/help-bleeding-easytroice-gearbox-astra-h-2004-a-404142/#post2244148
:)

I dont quite understand what you mean?? I asked where this guy was, so maybe I could help if he was local, but he is on other side of planet earth, you are welcome to go though :)

[Meat-Head]

Cool love non start cli7tos

1) deffo deffo change crank sensor there low cost
Rumor states, GENUINE FACT (in verified, but believed true)
the signal goes into ecu but over time gets weak, but has enough ppower to fire one...
but not the other

2) loom over bell housing/ i front of battery rotten


3) white plug syndrome in under hood fusebox

4) in front of engine at bottom just above
Sump is earth for ecu, manifold off for what eever earth gets loose

5) hate this ishit

6) the relays chew ge / check them (iShit)

7) cambelt snapped, har har

8) for reference if 4 coils on each pot there wweirded.

In series

[cactikid]

if all of the above not understood scrap car lol

[gttuning]

hi i say crank shaft sensor must be replace on them cars.this is first thing what i do if clio dont start,stupid question:)immo light is ok? it comes on and off?

[ninja123]

immo light is fine, i progrmmed new key to this car, also its defo not crank sensor as checked engine speed with diag and have injection pulse, I have a ecu plug from scrapyard and wired coil, all earths and lives direct, and crank sensor too, but still the same :(

ninja

[cactikid]

spray ether into throttle body and see if any effect.

[Meat-Head]

Err for the sake of $8 stick crank sensor on

chevk wiring plug on crank sensor as there's a modified plug
if wires transposed then won't start

[ninja123]

it is not crank sensor, got engine speed and injection pulse, and spraying combustables into air intake wont ignite without a spark!!!

ninja

[Meat-Head]

DUMB QUESTION:-

Unplug fuel pump under back seat, see if spark gets bigger

DUMB QUESTION:-

Find ignition feed to coil, stuff wire into it to battery +

[rideon]

Should i go on with the dumb questions...........??
Try NEW coilS & sparkplugS

[Meat-Head]

Yes ride off. Unlikly coil could be internal shorted but diagnostic and yes if crank cranky cranky by everybody in the street and his dawg had a go, porcelain would be soaked with gasoline.

[shadow12]

did you load test wires from ecu to coil, or try wiring coil direct to ecu,

[ninja123]

Load test? I even REPLACED the wiring from ecu to coil, put direct live from battery to ecu and coil pack, tried new coil pack, tried another ecu, it is defo not crank sensor, i wired ecu earths x3 direct to battery etc etc???????

meaty - what will i gain by unplugging fuel pump?

ninja

[alessioblaupunkt]

Timing marks? Are they ok?

[bonecrusher]

try kick starting vehicle

[rideon]

meaty - what will i gain by unplugging fuel pump?

AFAIK there is one relay that supply the coil pack and the fuel pump.....
Now, that i read your first post with my eyes open...think that you should double check the ground points of ECU there should be at least 3 of them....

[Meat-Head]

Well after all that not, let's pretend Le fuel pump is drawing more than an maps (iShit) MP expensisez giving same if argument 10 volts to la coil

rideon near enough read my mind spooky


what is cranking voltage at coil and battery?

agree with boneface try kick starter

[alessioblaupunkt]

Disconnect all the useless electrical plugs that are not necessary to start the vehicle:
O2 sensor, H2O sensor, etc...
Leave only rpm sensor for ecu, IAT air intake temperature sensor, fuel pump, coil, injectors

Probably could be:
- intake air pressure sensor faulty ---> drive ecu crazy
- water temperature sensor faulty ---> drive ecu crazy too much fuel if -30C degrees or poor fuel if +130C degrees
- O2 sensor(s) faulty ---> drive ecu crazy
- got knock sensor? Disconnect it. Could be faulty.

Charge the battery when you're not cranking. Should be at 12.5 volts 24 hours after the full recharge.

See if there are silly electric stuff on coil supply or injection supply such as resistor to warm oil vapour in the cranckcase breather hose.
Those kind of resistor could be shorted.

Question time:
How many RPM during crancking?
Throttle body angle with: key on / during crancking ?
Are the timing marks ok? If out of timing for few degrees probably will not start.


This kind of faults is a huge time consuming. Hope you find it quickly or Reno owner must sell his/her house.

[rideon]

Read post 20 with my eyes open....about the ground points....
That coil pack delivers spark for two cylinders at one time ,I've seen spark issues when the spark plugs are faulty OR not the right type..

[alessioblaupunkt]

Hey what engine do you have?

D7F 720 , D7F 722 , D7F 726 , D7F 744 , D7F 746 , D7F 764

Silly French 6 engine same range: 1.2 8 valve in production in 2002. And the question is why???

I can help you with guided diagnostic but I need some data from you.

Let's get rid of some info first: Does car have AC? Or does owner get hot in the summer?

What Trouble code do you have? None?

Disconnect coil plug and tell me what's the primary resistance of coil. Should be in the kOhm range but give me the number.
Do the same for secondary resistance of coil. Should be in the Ohm range.

Connect the LED test lamp to the ignition coil negative terminal and earth.
Crank engine and observe LED test lamp. Does the LED test lamp flash while cranking?

[gttuning]

hi ninja it just come to my head year ago i had clio same crank signal ok all looking good i checked compression check and it was bit funny, (car was parked for one week in customer house) i end up towing car for 8miles befor it start.try this sounds stupid but there is something in them engines that cause them not to start if they or parked for few weeks. .and i had other clio after a put head gasket on same fu...think had to tow the bastard for miles before it start.
there is some think to do with valves in head.but dont know what cause that. and had golf 5 petrol last month same think car parked up for 6 weeks no dtc car not starts i end up to try tow and it worked,worth to try.

[Meat-Head]

Ah sort of second above, intercorsa c. Oil pressure drops, engine cranking not fast enough to create oil presssure tow corsa 15 meters engine spins and runs, hope not auto!

easyenough to put 24 volt on starter only. Put two battery's on floor, unbolt pos of starter, hit key

[ninja123]

THE END!

Someone had been at this car before me (breakdown service) and had probed the coil multi plug with something way too big, and splayed the connections out so no contact was being made when plugged onto coil.

Cut off plug from scrapyard and all good now - thanks for all input, ninja

[cactikid]

so size does matter,the bigger the tool the more you **** up:top: