Hey,

my car:

Citroen Berlingo 1,4 1997.

For some weeks ago, my Rpm meter ( tachometer ) started to have some problems. Some times when i started my car, the Rmp meter did function and some times it did not. At the moment, it have not been working for about 2 weeks. And now my engine Idle speed is very high. Its so high that i can drive in 2. gear without touching the accelerator pedal.

Estimated idle speed is about 3,5K to 4K ( Or even higher, hard to tell )

* When i start my car, regardless of Cold or hot Engine. My Idle speed is normal for about 5 sec then it will slowly go up.

* If i push the the accelerator pedal and then release it, the engine will stay at the same Idle speed as i had when i pushed the pedal.

* I have checked the gas cable, its OK

* I have checked the Throttle Body. Seems OK.

* A local Citroen workshop tryed to find the problem, but they could not get connection between the computer and my cars brain. So they was not able to help me at all. ( they told me to check the fuses, but every single one is ok. )

I think that the tachometer has two functions. It tells the brain what position the flywheel is in and provides information to the tachometer. I tried to disconnect the sensor, but then i cant start the car.
Is it possible that one of the function of the sensor is not working as it should?

I would also mention some other problems that I have not noticed until now.

When i turn on the ignition, I can then hear my fuel pump running. The only problem is that it just keep running. I believe it should run for about 5 seconds and then stop.

Chris H., November 2011

Connection with brain - Fixed
Tachometer - Fixed
Idle speed - Fixed

On citroen berlingo, there is a relè plug next to the batteri, i had a fulty connection on pin number 9 on the reley to pin number 1 in the contact that is going inn to the reley. Everything is now fixed. Thanks to everyone who tryed to help me out.

Chris, June 2012

Thanks for the advice, but i have a petrol engine and not a diesel. I pretty sure that my english isn't the best, but I hope that you are all able to understand me.

I'm so sick of having this huge engine problem. My car is like picking every sec in 80 km/t. Im almost crying every day to work -.-

as ive said earlyer, I took the car to a citroen workshow. but they can't get any connection with my car's brain.

Any suggestion?

Thanks alot.,

Chris, February 2012

iv got an early diesel vaireant less complex. but will give u a go, not sure about the fuel pump bit but get a haynes book and look up where the 1 camshaft position sensor is also 2 crankshaft position sensor is , ether of these CUD be linked to both rpm. speed or tacometer gauge , dont think there expensive to buy. my diesels rpm gage also hasent worked since purchase but has no effect on rpm speed. one thing to note modurn ECU brains learn things about the running engin and ures may be running on stored data IE a sensor is out and its in rough run limp mode. to get u home. also from expereance a lamda /exhaust gas sensor can last as litle as 50000 miles its giveaway is runs ok cold wen its not used soon as its wamed up its used and is giving the BRAIN/ECU bad readings - change it. good luck.

lee jcb mec., December 2011