alexlintern

Having some problems with 2001 1.8 petrol C5 ( 6FZ engine code ) Symptoms are: 1. Poor starting (intermittent) A new crank sensor (1920 7W 96 324 005 80) has been fitted when the car was a total non-starter. 2. Poor performance (I would compare this to a prolonged flat-spot; as if there is zero ignition advance) 3. Misfire / backfire sensation on part throttle. All vacuum pipes are checked and ok. Is it possible to try cleaning throttle body and what spray is safe to use (if any)? Thanks guys!!!!

The non-start traced to faulty crank sensor! located in a hiding place on the bell housing! The sensor sends a signal to the ECM and that runs the fuel pump & injection system. The engine is still suffering from a fluttering type of hesitation and I wonder if the EGR valve is faulty; could this be cause of fault code p 0171? I tried removal & clean of EGR and car seemed to run better for a week. I had intermittent fuel pump problem before replacing the crank sensor.

MAP sensor part no is 0-261-230-057 Made in Germany (Bosch part) I shall try and locate the crank & cam sensors to measure resistance values; any clues on their locations much appreciated. This is a nuisance!

Thanks for the valuable info! Very kind of you. The absence of MAF will end my headscratching about where the blessed French have hidden it hehe. I am now thinking that the crank sensor is possible however the fault code p0171 fuel injector fault. There is a split in the breather pipe from the cam cover to throttle body air intake which may cause the ingress on additional unmetered air to cause the lean fuel mix and the injwctor fault code. An air leak will cause severe long term problems in older engines. A new car would be great!

Very sound advice, thanks! Fuel in tank and pump runs to prime fuel system pressure. The MAF sensor part is Bosch 0-261-230-057 and is located in the swirl manifold. I am presuming that no signal from a crank/cam sensor would deliver a subsequent fault code; it could however explain why the motor will not fire! Fuel + spark = GO until the electronics get inputs. I am now wondering what the ECU read when starting.

Hello - A 2001 C5 Break 1.8 petrol 16v will now not start :( The engine cranks but will not fire. X431 diagnostic shows the following: p0170 Fuel injection - intermittent fault There is also a fault stored for 'richness regulation intermittent fault'. Before the non-start problem the car has been suffering from poor power and also from a bad misfire (possible EGR valve?) The EGR valve was removed and cleaned which gave a short term improvement. Now the car will not start and I want to ask if anyone has experience of cleaning the MAP air mass sensor (this seems like a common cause of failure) I cannot see how to remove the air intake elbow after the flexible coupling from the air filter box. There seems to be a hidden screw somewhere! I have also read that C5 will not start if one injector is faulty and the ECU gets a low pressure reading from this circuit. Is this correct???? What can the DIY er do next? Thanks for any help and advice offered!