A610 Lumpy when cold

Hi chaps... noticing that my A610 is very lumpy when still on choke or half choke. Doesn't produce smooth power at all, seems i put my foot down a little and nothing happens then it goes. Obviously i don't use the turbo when it's cold, by putting foot down i mean just normal driving trying to keep up with everyday traffic.

Any ideas?
Alex

Probably coolant temperature sensor mounted on the alloy link pipe that goes from one head to the other behind the water pump on the front of the engine.

Thanks very much. Forgive me but i'm new to this car. Is the part expensive? and where from?

Cheers,
Alex

It'll be available from Renault - and if my measurements are correct, it's NOT the same as a GTA one. Loads of us probably have water pumps kicking about which would have spare sensors in them, but it's a good idea to buy the proper one from Renault. It'll probably be around 20-30 quid. Let me know if you'd like to get it through me, my lot are clued up on Alpine stuff.

BTW it might be a more simply basic problem - spark plugs, cap and rotor, etc.

(edit for spelling mistakes!)

Hi chaps... noticing that my A610 is very lumpy when still on choke or half choke. Doesn't produce smooth power at all, seems i put my foot down a little and nothing happens then it goes. Obviously i don't use the turbo when it's cold, by putting foot down i mean just normal driving trying to keep up with everyday traffic.

Any ideas?
Alex

clarkson had the same problem i heard

No, his steering lock kept jamming on

There are 3 water sensors on the cross over pipe off the water pump. I can't remember which one it is without my diagnostic unit plugged into the car (If it helps, I rent out this hand held unit so you can check all the sensor outputs on the car/ecu and check any faults)



14, 15, and 16 are 'water' sensors.

14 is 7700809907 £15.88+VAT

15 is 7700809909 £12.70+VAT

16 is 7700737571 £10.70+VAT (im guessing its this one, but don't quote me)

These are not Alpine specific parts, standard Renault sensors used on many vehicles including Safrane & Laguna V6.

You might want to check the plugs to these sensors first to check they are all connected/not corroded. It may just be a wiring/connection issue.

Again, it might not be the ECU coolant sensor at all, A610's suffer from clogged injectors, and from cold is when the car needs the right fueling so it may be running leaner on 'choke' and hence under powered.

Using my diagnostic would rule out if it is any sensors, and more a 'physical' problem.

Thanks very much for the info. The car has started stumbling when warm now. i had to sit in a big traffic jam the other day crawling for about 40 minutes. When the traffic thinned i hoofed it in second and the car just went dead. So i lift off and the car comes back to life, but when i try to go again it dies again. Then as quickly as it started the problem went away and was fine on the motorway. At no time did any of he gauges rise in traffic. Water and oil temp fine all the time. Is this problem connected?

Thanks very much for the info. The car has started stumbling when warm now. i had to sit in a big traffic jam the other day crawling for about 40 minutes. When the traffic thinned i hoofed it in second and the car just went dead. So i lift off and the car comes back to life, but when i try to go again it dies again. Then as quickly as it started the problem went away and was fine on the motorway. At no time did any of he gauges rise in traffic. Water and oil temp fine all the time. Is this problem connected?

It can be lots of things then. It may be a faulty throttle position sensor. If you are semi mechanically minded, just lift the metal cover off the engine, and you will see a red sensor unit mounted to the side of the throttle body, with a 3 pin plug connected to it. If you disconnect this, the ecu will run in default mode and ignore this sensor. You can then rule out if this is at fault if the car runs better.

Again though, the diagnostic will tell you exactly what each sensor is doing.

Thanks a lot mate. I used to own a GTI-R, which i knew inside out, but i lift the cover on this and have no idea what i'm looking at!!