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I have a N reg renault clio 1.4 RT that will not start, the fuel pump relay cuts in on initial cranking but then cuts out, sometimes the engine attempts to start up but then stops. I removed the air box, cranked the vehicle and shorted the relay and found no fuel to be injecting in. Vehicle is sparking ok so this is not an immobiliser problem. ANY ideas would be appreciated .
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Vehicle is sparking ok so this is not an immobiliser problem
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Are you sure its not the immobilisor?
is it just a chipped key or the blipper type with the flashing light in the centre consOLE
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I'm certain it's not an immobiliser fault, it is the key with the flashing light though
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when you have turned off the immobilisor the light on the centre console should be steady red as you crank it
if it flashes as you crank then its imobilised
usual cure is dry out the pickup by the sunroof switches,they usually go well manky here due to poor sealing of the roof aerial
you need to dismantle the cover,cant remember if its just clipped of self tapped
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another thing thinking on, have you 2 keys for this emotive vouture?
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Cheers for your help but the light is steady when cranking not flashing
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i would take the cover off the pump under the back seats undo the pipes put some tubing on them into a gallon can turn the ignition with immobilisor off and see if the pump is actually priming for 10 secs prior to cutting off
if it is then i would move on to the engine itself and be checking crankshaft senser in case this has a baring on the situation
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This link any help?
www.honestjohn.co.uk/forum/post/index.htm?t=7863&v...f
Nub of the tread is that replacing the Coolant Temperature Sensor (about £25 ish and easy to replace) cures lots of starting problems on Clios.
Might be worth a try, though I am no expert but followed the advice (from Adam Going) and it cured the fault on my son's Clio and several other peoples Clios as here
www.honestjohn.co.uk/forum/post/index.htm?t=14083&...t then someone else had a different solution
www.honestjohn.co.uk/forum/post/index.htm?t=27323&...f
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Phil
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phil, do you know if it was the coolant temp switch or the coolant temp sensor? as they do different things and im a bit confused as to why the temp sensor would affect the fueling, the switch would more sense to me. cheers for your help.
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Jonny,
Sorry, did not see your Q until today.
In our case it was definitely the CTSensor not the switch. As I said, I'm no expert and this worked on my son's Clio - that's why I suggested a look at the different threads. Your prob may be different and you would probably be better off taking note of those who actually know (Andrew Moorey etc) rather than me 'cos I now very little! Just hoped that the tread I suggested might point you in a direction that would help with prob.
Good luck
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Phil
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cheers for replying, i have disconnected the fuel pipe from the throttle housing and turned the ignition on, fuel is pumped out for a short time. i have bypassed the immobiliser 5 months ago due to a fault, suspect immobiliser control unit. and i dont believe this is fault is related with that as i previously found that the immobilser cut off the spark aswell, it is sparking ok at the moment. i had in mind the crank sensor but would this not bring up an engine warning light? and how would you recommend testing it? is it located on the back of the block near the starter? cheers
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get one from a scrappy if there is one near you, cost should be less than a £5 ,you would be very unlucky to buy a bad one
seems like you know your onions you could probably teach me a few tricks
with ignition OFF
pull plug on crankshaft senser and then put your multimeter on it
it should read 200 ohms approx
re reading your post you have fuel and you have a spark
not much left really then
assume belt is ok?
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yeah i know a bti im mechanic but just got a bit stuck and am looking for a bit of advice, yeah got fuel upto the throttle housing but the injector isnt injecting, does momentarily intermittantly. so i think its because the ecu isnt telling it to but im unsure for what reason.
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hi jonny
sorry to be a bit off topic but can you describe how you disable the immobiliser on this. daughter's rt came with two plippers for the immob. only one left now and its falling apart.
many thanks.
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I'll describe this the best I can, I found that the immobilisor cuts off most engine management systems not just fuel or spark I decided that if I could provide a cranking and ignition live to this circuit it should hopefully run!!! Start off with removing the top half of the dash it is held in with five torx screws, there is a connector block at the back of the dash behind the instrument cluster I found the last wire on the right hand side was linked to the engine management system I then jointed a wire into that and down to the ignition barrel, using a test light I found an ignition and cranking live (needs to be live whilst cranking) I think it was yellow or white but you'd need to check. I then jointed it into that wire I would recommend putting an inline fuse although I didn't which might be the reason for my problem now!!!! Now help me get mine started!!!!!!!!!
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Its a long shot but if you can get hold of the resistance values of the throttle switch worth a checkout & the wiring because if the throttle switch is telling the ECU thats its at full throttle it will turn the injector off as it goes to what is called clear flood mode
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do you mean the throttle potentiometer on the throttle housing mate? i dont think the is one on the pedal assy as far as im aware. cheers for the help
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sure do!. If you had someone who could access live data info you might find problem in minuets
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cheers for replying, would something like a snap-on diagnostic computer do that?
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On many occasions the aftermarket security switch fitted inside the glove box can lose one of the wires mentioned above going to the two wires running under the top of the dash. just rejoin and insulate the cut wires and the problem goes away. 90% of the clio owners we come across don't even know it is there. But I'm not sure this is your problem.
If you have a spark then its not the crank sensor. On turning on the ignition the pump will prime for a few seconds then wait until the ECU sees a crank signal to draw in the fuel pump relay. We have had a few immobiliser probs with these and unfortunately this is integral with the engine ECU. It's possible to have the immo function disabled by ECU reconditioners. but I have never had this problem personally so cannot comment further.
Andrew
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Simplicate and add lightness!!
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cheer andrew, i bypassed the immobilisor about 5 months ago, and it doesnt have that type of immobilisor on. you were right the crank sensor did not work. at inital cranking it injects a very small amount of fuel, then does not again, im suspecting the ecu as you said just thought id try the other things 1st. do you still think it will be that from what iv said? cheers mate
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You said in your original post the relay for the fuel pump cuts in when you crank it and you have a spark. A sit cranks and the relay cuts in suggests that the crank sensor is ok and the immo is letting the system go to start. Have you checked for fuel quantity and pressure at the injector? Disconnect the return line to the tank fit a length of tube to the outlet from the throttle body and put it into a container. Switch on the ignition and you should get a 2 second gout of fuel into the jar. Doing this on the return will prove you have enough pressure to get past the pressure regulator. If not suspect the fuel pump or the relay. If the fuel is present crank the engine briefly and a similar result should happen. If this is the case suspect the injector and signal to it. The signal can be checked simply by attaching a test lamp across the two terminals to the injector connector (disconnected). On crank the bulb should flash. If it does but you have fuel and nothing coming out of the injector then go for injector, if it doesnt flash check for a power supply to the injector (same relay as fuel pump). Got to go to work now, have a bash and come back to us.
Andrew
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Simplicate and add lightness!!
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ok cheers for that, i checked fuel supply to the throttle housing seemed plentyful, the car isnt at my house which makes it a bit more awkward. iv swapped the fuel pump relay, so i dont think thats at fault. on initial crnking the relay clicks in then shortly after cuts out. iv tried shorting the relay and had someone crank the engine it obviously wouldnt start. the injector does fire a very small amount of fuel to start with, but thats all. could it still be an injector fault if it does this? cheers for your time and help mate, you sound pretty clued up. im a technicien but hate electrics hahahaha, doesnt help i cant get hold of some wiring diagrams.
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