Revolutions failure

Renault 19 1992  135000 miles
When braking, revolutions raise to 1500 rpm, they are then maintained at 1000 rpm and finally drop to 500 rpm, almost at the point of stalling.
Liz from United States 11 years ago  
LI
1 report 
HOWARD from United States 11 years ago
It might be sucking to much air from the vacuum servo. Check that.
mpenconelius@gmail.com from South Africa 4 years ago
Map sensor is new petrol pump is new petrol is in half tank
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