Citroen c3 1.4 kfv engine.Idling issues.

[bonecrusher]

Hello.
Guys I am working on This citroen C3 1.4 kfv engine.Idles perfectly when cold.The issue here is that the car does not idle once warmed up.There are no fault codes stored.A brief history on the car.The cylinder head has been redone at another workshop.

In live values with engine off ignition on.I have idle signal.Temp sensor working well.


Any input greatly appreciated.

regards

[Meat-Head]

don't think this is your problem, but some of the shitreons had problems with the fanny moulds warping or something

[d.zio]

change for first the ect sensor to be sure.....never mind that shows good to live data....

[purdy]

Not sure but Citroen/Peugeot had a flash that cured a lot a running problems. When there is no apparent faults.


Purdy

[quinnd]

I agree with Meataxe. Prob got a intake leak. Whats your fuel trims?

[Ashraf6119]

What are the Front and Rear Lambda Sensor readings when Engine Cold Temp and When Engine Warm Temp..........

Check how does the Front Lambda read does it change from 0.15 to 0.80 V or its just staying at one position.

Also as mentioned the Intake Leak could well be your problem so worth to have a good look..........

[m3vuv]

had the same problem on a 1.1 206,it was the engine loom rotted and causing a high resistance on the ect sensor,it had no codes recorded,was back to basics with an ohm meter,hope this helps.

[quinnd]

Also check coolant migrating up the loom into the ecu

[bonecrusher]

Hello

Just an update to this,

Removed the intake manifold and found the mating face slightly melted and warped.Used my trusty old file, installed new o rings and car is fixed.

Thanks for all the valuable input, It helps!

[Meat-Head]

was it plastic?

would have excpected it to have been sucking in enough air to make it idle faster

next time squirt some UB40 down it see if it sucks bevis

[m3vuv]

had it been cooked?,i would expect head gasket probs further down the line!