In need of a littke help.

[Jamesc94]

Hi everyone, Im new to this and not sure if im on the right  page or not but i have a v5 wrx sti and when first started or driven it will drive fine but once its at full working temperature if idling and when it comes to a stop the rpm drops to idle it will cut out it smells very rich i have checked the voltage on the air maf sensor which was 3.5 volts idle and decreased as the rpm was increased i have always known for the voltage to sit at around 1.3 volts and increase voltage as rpm increases with other models not sure with this model impreza is there any other check or sensors that could cause this fault.

if anybody could help, would be appricated.

 

cheers 

[Scoobyghost]

Have you checked the ECU for any error codes? There is a guide on here for how to do it. On classics, there are two black connectors below the steering column. Connect those up, turn the ignition on and count the "check engine" flashes. A long flash is a 10, a short flash is a 1. I'd recommend videoing the flashes so you can watch it back. Once you have your numbers check them against the list on the forum. There is also a guide on how to clear the codes.

[savage bulldogs]

As ghost said , have a look in the tech section at the sticky thread on how to self check for ecu codes and reset the ecu . 

Unfortunately i haven't doen electrical tests on later classics and don't have a service manual for the v5/v6 , so can't help with voltage readings. 

The idle control valve and maf can be cleaned with electrical contact or brake cleaner , both of which tend to "gunk up". Just bear in mind ,You'll probably need a new gasket for the icv (from import car parts) if you do remove it to clean it .