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Crank no start

Tiny
PULE
  • MEMBER
  • 2010 RENAULT LAGUNA
  • 1.6L
  • 4 CYL
  • TURBO
  • FWD
  • MANUAL
  • 145,673 MILES
Engine turns but does not start when switched on.
Saturday, October 8th, 2016 AT 11:50 AM

29 Replies

Tiny
RENEE L
  • ADMIN
  • 1,260 POSTS
Hi PULE,

While our expert moderators are going through the questions here is a link to an informative article from this site with step by step instructions and pictures and a video on what to check for when your vehicle cranks, but will not start. One of our experts will get back to you shortly.

https://www.2carpros.com/articles/car-cranks-but-wont-start

If you need any further help please come back to the site as we are always happy to help.

Thank you for visiting 2CarPros.

Kindest regards,

Renee
Admin
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Saturday, October 8th, 2016 AT 1:32 PM
Tiny
JIS001
  • MECHANIC
  • 3,411 POSTS
Unfortunately we do no have that vehicle here in the United States, but all gas engines work on the same theory. First thing you will want to check is your fuel pressure. If no fuel pressure check your fuel pump fuse. If okay swap the fuel pump relay with one that is identical (preferably the horn relay if possible)

If you have fuel pressure normally something like 45-55 psi then check for spark. If pressure is too low or no pressure at all. Verify power and ground to fuel pump. If okay then you have a faulty fuel pump. If you have no spark check your injector pulse. The link Renee posted shows you how to do it with a paper clip and test light. You just want to be careful not to use a thick paper clip or you will spread open the terminals on the connector. Best bet would be to rent a noid light set from your local parts store. With noid light connected verify the light flashes. If it does check that one of the wires has power.

If you have no spark and injector pulse then you will have a faulty cam or crank sensor. If no power on one of the injector wire harness make sure to check all fuses. Also if you can, scan the computer for fault codes.
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Saturday, October 8th, 2016 AT 2:42 PM
Tiny
JIS001
  • MECHANIC
  • 3,411 POSTS
Sorry on the noid light test meant to say if it does not flash, then verify one of the wires has battery voltage.
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Saturday, October 8th, 2016 AT 2:44 PM
Tiny
RENEE L
  • ADMIN
  • 1,260 POSTS
Thank you JIS001!
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Saturday, October 8th, 2016 AT 2:54 PM
Tiny
ESCORTBRV612
  • MEMBER
  • 1 POST
  • 2005 RENAULT LAGUNA
Engine Mechanical problem
2005 Renault Laguna 4 cyl Front Wheel Drive Manual

hi I am borrowing a laguna on a 55 plate 1.9dci, and my mate jumped off it the other day and now it seems to not start, we have replaced the battery because we fought that was the problem but it comes up with the dash lights and says all ok but push the start button and it doesnt want to start, please help many thankz
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Wednesday, March 25th, 2020 AT 1:09 PM (Merged)
Tiny
DAVE H
  • MECHANIC
  • 13,383 POSTS
If there is a red light flashing on the dash didplay the vehicle immoboliser is on. Try locking and unlocking the car with the remote control (keyfob/card)
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Wednesday, March 25th, 2020 AT 1:09 PM (Merged)
Tiny
MICHAEL_CAT_UK
  • MEMBER
  • 7 POSTS
  • 2002 RENAULT LAGUNA
Engine Mechanical problem
2002 Renault Laguna 4 cyl Two Wheel Drive Manual

Car doesn't start when cold, but does when warm.

I've had glow plugs replaced, a new battery and a new crankshaft sensor.

If I take off the air filter and squirt WD-40 in the intake, it helps to start the engine.

The car idles and drives fine - No loss of power and is averaging low 50's in the mpg so appears fine here too.

Any ideas? Apparently the fuel is getting to the fuel rail ok. Does this sound like a problem with the pressure regulator or the injectors? Any help would be great.

Michael
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Wednesday, March 25th, 2020 AT 1:09 PM (Merged)
Tiny
DAVE H
  • MECHANIC
  • 13,383 POSTS
Replace the fuel filter. Check fuel pressure is good. Add a good fuel treatment to the fuel tank to clean injectors
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Wednesday, March 25th, 2020 AT 1:09 PM (Merged)
Tiny
MICHAEL_CAT_UK
  • MEMBER
  • 7 POSTS
Sorry have changed the fuel filter also and added shell diesel and wyn's injector cleaner into the fuel to help clean them up. Now it's difficult to start.
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+1
Wednesday, March 25th, 2020 AT 1:09 PM (Merged)
Tiny
DAVE H
  • MECHANIC
  • 13,383 POSTS
This could be a low fuel pressure fault .. fuel pressure at WOT (wide open throttle) sounds like it is working correctly as you have no loss of power ..so it could be the pressure regulator going bad or the pump going bad and losing pressure over periods of innactivity (overnight).. have the fuel pressure checked @ KOEO (key on, Engine off) .. I do not have the spec's for this vehicle as it was not released in the USA .. your local library or autoparts store should have a repair manual for the vehicle .. or most garages will have the spec's ! .. also have a garage/tech check the MAF/MAP (mass airflow/manifold absolute pressure) sensors are in the correct ranges @ cold start !


https://www.2carpros.com/forum/automotive_pictures/266999_AAA2_1122.png

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Wednesday, March 25th, 2020 AT 1:09 PM (Merged)
Tiny
MICHAEL_CAT_UK
  • MEMBER
  • 7 POSTS
Many thanks - I'll give it a go. I know that the mass air flow was updated a recent while ago.

Also when I bought the car it started fine, but when it stopped starting, I realised that the connection to the fuel pressure regulator was unplugged. I plugged it in but it made no difference. Maybe this was not working and they unplugged it to stop the fault being recognised.

Strange how it started fine for a while though.

Michael
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Wednesday, March 25th, 2020 AT 1:09 PM (Merged)
Tiny
SIMON228888
  • MEMBER
  • 2 POSTS
  • 2002 RENAULT LAGUNA
  • 4 CYL
  • FWD
  • MANUAL
  • 63,000 MILES
Hi, when I press the push button all the relays click as per normal, all lights come on and go out as per normal, steering lock disengages as per normal, but when the button is pressed all I hear is the relay click, and then after a short time the relay clicks again, I guess its timed if it dont start within the time limit,

if I bump the car its fine,
When the engine is warm, it can be turned off and will restart no problems, will do this every time,
but not when it is cold,
So dont think its anything major, just fed uop of parking it on hills,

Please can you advise.

Thank you

Simon
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Wednesday, March 25th, 2020 AT 1:09 PM (Merged)
Tiny
MICHAEL_CAT_UK
  • MEMBER
  • 7 POSTS
Sorry I got it wrong - Ignore the regulator.

When I bought the car it was the Fuel Filter Wiring Connector which was unplugged!

Any ideas why it was fine, but now won't start? What does the connector do? I looked in the Haynes book and it says it's a 'fuel heater wiring connector'.

Michael
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Wednesday, March 25th, 2020 AT 1:09 PM (Merged)
Tiny
MLYNCH1979
  • MEMBER
  • 1 POST
I have the exact same problem with my 1.6 laguna. Have you had any luck fixing it?
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Wednesday, March 25th, 2020 AT 1:09 PM (Merged)
Tiny
DAVE H
  • MECHANIC
  • 13,383 POSTS
There is a small fuel heater in the base of the filter housing. This aids vehicle starting on cold days. This is probably faulty and this is why it is unplugged. Replace this heater and reconnect the wiring
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Wednesday, March 25th, 2020 AT 1:09 PM (Merged)
Tiny
SIMON228888
  • MEMBER
  • 2 POSTS
Hi
yes I sorted it, I replaced the starter motor but also check the fuse (of some sorts) which is directly on the plus side red cable, just as it comes off the battery (it should be a cream coloured box on the lead) about 1" long. Mine was split so I was getting no live feed to the starter motor as well as the altenator. So I advise you to check this too. Also if you replace the starter motor be careful you get the correct one, as there are 2 variations, the difference being where it bolts onto the bell housing. I assume yours is the newer shape. I hope this helps.
Cheers
Si
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Wednesday, March 25th, 2020 AT 1:09 PM (Merged)
Tiny
MICHAEL_CAT_UK
  • MEMBER
  • 7 POSTS
Any ideas where I can buy this from?

Michael
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Wednesday, March 25th, 2020 AT 1:09 PM (Merged)
Tiny
DAVE H
  • MECHANIC
  • 13,383 POSTS
Most good autoaparts stores will be able to supply this .. halfords or any of the small independant stores will be able to get it for you if they do not have it in stock ..I'm not hundered percent sure if on this model it is actually built into the filter housing !

Hope this helps


https://www.2carpros.com/forum/automotive_pictures/266999_AAA2_1135.png

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Wednesday, March 25th, 2020 AT 1:09 PM (Merged)
Tiny
MICHAEL_CAT_UK
  • MEMBER
  • 7 POSTS
  • 2002 RENAULT LAGUNA
Engine Mechanical problem
2002 Renault Laguna 4 cyl Two Wheel Drive Manual

I have a 1.9dci diesel Renault Laguna 2002. Started first time and drove fine. Then starting took time and tended to start when I pumped the accelerator pedal. Now it won't start at all. Had the glow plugs replaced as only 1 out of 4 was working, but still no joy. Garage don't know and have a list of possibles such as injector leads, etc. However, when it was running it never hesitated, stalled or lost power. I remember when it broke down that there was a connection not plugged in and plugged it in. It was to the Fuel Pressure Regulator - So the car was running without this. Could this be the fault? A faulty regulator?
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Wednesday, March 25th, 2020 AT 1:09 PM (Merged)
Tiny
DAVE H
  • MECHANIC
  • 13,383 POSTS
A faulty regulator could cause the fault it may be supplying too much or too little fuel? Try unplugging again ! Also check fuel filter is good and check for air pockets in fuel lines. Prime system before attempting to restart
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Wednesday, March 25th, 2020 AT 1:09 PM (Merged)

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