Unstable rev, not idling, whirring

1999 Peugeot 406 1.8 MT petrol 16V UK
Car: Peugeot 406
Year: 1999
Variant: 1.8 MT petrol 16V UK
Categories: Running Rough, Starting & Power Loss
Hi
The car is exploding on starting and produces a whirring sound. It slowly switches off on idling. Sometimes it switches off on releasing accelerator eg stopping at a robot. The whirring sound eventually dissapears in 10 mins. When in motion it jerks with a clicking sound and revs high. Sometimes it just revs without stepping on accelerator. U sometimes step on the eccelerator and it does nt respond, it may switch off or ma delay esp just after starting. Changed pump, filters, cleaned throttle, changed stepper motor. What cld it be?
Problem added: Oct 2, 2017 (6 years ago)
Better not to open 3 posts , 1 is sufficient and helps with answering .
Answered Oct 16, 2017 (6 years ago)

This problem is archived

If you're having a similar problem please click below to re-post this problem, you can then customise it to suit your situation.

Helpful & Related Pages on AutoInsider

More problems with the 1999 model year Peugeot 406

We have 67 problems and solutions in our database for this model year of the car.

View all Peugeot 406 Problems