intermitant idle speed when first started but simmers down once warm
I have just purchased a vauxhall astra and when you first start the car the idle speed slightly goes up and down between 1000 revs but simmers down once warm , is this electrical or a mechanical problem .
https://www.google.com/#q=vauxhall+astra+intake+air+temp+sensor&tbm=s hop
does this need to be replaced or just cleaned
this is like a tiny lightbulb filament...easily broken....do not attempt to clean...these are relatively cheap...just replace it~
it's to let the computer know how dense the air is coming into the intake plenum....if cold will make the mix rich...if warm will know that too- again like a tiny filament~
i went to halfords and no crc cleaner can i use electrical contact cleaner to clean the mass flow sensor
yes...perchloroethane...or trichloroethane....radio snack also sells "electronics cleaner" which is a boat-load of money for what it actually is~ more importantly will it be gettin' buggered up again right away....there is excessive crankcase fumes in the intake....perhaps the Positive Crankcase Ventilation valve is plugged or malfunctioning~
