Renault laguna x reg starts great when cold but struggles when hot. i have to pump accelerator two or three times before it will start

take out all you coil heater and change them as you might have one not working it will start on three so just check you can test them have a look on youtube at testing glow plugs they will show you some trick of the trade

renaults are notorius for the throttle sticking they are electronic and cannot be ajusted you can try spraying it with wd40 of eqivelent if that doesent work will need a new throttle pedal easy to do a couple of nuts and a wire harness you can do this yourself hope this helps ivan

The first thing to do is get a compression check done,as you dont say what miles its got im assuming it has a few, so getting this done will confirm that it aint worn out.yet.

dont talk to me about these renaults ,pain of my life but iam a bit confussed here as to the warning lights because i would expect the warning lights to come on with the juddering ,then it picks up again this is caused by the sensors on the pedals under the dash ,(want to see my teashirt) but i dont remember the heater lights coming on at the same time ,you sure the timing belt hasnt broke ?? does it still run ??

i have seen a problem where a jetta diesel would really turn slow no matter what you did..the starter was weak.the increase in heat added to the torque needed to turn it over......

I had the same fault on my laguna remove idle air valve and clean with carb cleaner
then lightly oil with light oil like 3in1 DO NOT use WD40 as it goes sticky when the
solvents dry out replace valve and check connections

Worked on my car 2 years ago and still OK

Hi, I had the same fault on my Laguna 1.9dci. you have a faulty injector. possible one or more. changed one on mine and it got better but then a second had to be done, now problem completely gone.

theheaer core could be clogged or the thermostat isnt opening all the way either of those will keep you from getting heat

Don't know which Laguna you have but normally there is a reset button on the dash. switch the ignition on , don't start and twist the black button firmly either left or right and wait for the result.

check your linkages and shifter problem may be also in the gearbox