Hy guys.I have a problem whith my car,the rpm is making problems and i dont know where is the problem maybe someone had the same problem and know the fix.I have the car for 4 years and from when i buy it its making me this thing but only when is cold outside.
[ame]https://youtu.be/qkjaaZaMruo[/ame]

is it only happening in idle mode? Is the A/C on? I dont know much about diesel engines, but a spark plug and throttle body clean can help imo

gihan798114 said:

is it only happening in idle mode? Is the A/C on? I dont know much about diesel engines, but a spark plug and throttle body clean can help imo

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Hi,
that made me smile
You are correct on one thing, you don't know much about diesel engines. They don't have spark plugs or throttle bodies. (before someone gets more pedantic than me, the shut down butterfly valve on the JTD is not a throttle body).
For the OP, the obvious areas to start are cleaning the MAF, cleaning the EGR valve and checking for leaks in the inlet system. If the car has not been serviced since this started then replacing the air filter and fuel filter would be a good idea too. Further from that you need to get Multiecuscan or similar diagnostics connected to the car and look at engine parameters.


HTH,
Robert G8RPI.

g8rpi said:

Hi,
that made me smile

You are correct on one thing, you don't know much about diesel engines. They don't have spark plugs or throttle bodies. (before someone gets more pedantic than me, the shut down butterfly valve on the JTD is not a throttle body).

Click to expand...

never owned a diesel bravo yep starting with the fuel filter is good

The maf sensor is new original bosch,the egr is clean in the summer works great and the filters 3 month new.I put it on ecu scan and i have no error,i wish to remind that this problem have 4 years old.I even check the voltage on the alternator i have between 13.9 and 14.2 whith all functions on.

Hi mates i have same engine and same car i guess and i have same problem. Does any one know something more about this. I'm thinking in the drv valve with problems.

The JTD erratic idle when cold has yet to be solved on this forum

I'm thinking in the actuator present in the pump, this weekend i'll try if it is just electric\electronic or mechanical too.
I noticed that this does not happen all the time but is alot stronger when the engine is cold, but stil get this at hot engine noticeable but not so strong