own a classic wrx with apexi power fc and its a reet pain in the ****... it only starts when it wants to and seems to foul the plugs like its flooding ?? its done it a few times and is getting worse to the point of having to change the plugs every time any ideas ?? thanks all

 

Has it been mapped?

have you an air / fuel gauge?

Do you have a hand commander forthe Apexi PFC ??


Had Apexi PFC on myclassic for several years, super bit of kit when mapped properly.

 

yeh its got the hand controller but was mapped by a great guy so dont think its the map but have seen something about cranking cycles etc..... I was thinking the coolant temp sensor or something similar but would this still effect the cold start as it is standalone surely the values are already set so the fuel on start cant change ?? im also looking at taking the injectors out to get them checked maybe? im not really sure think this one has got me beat also wondered if ring wear would cause it as it is an old engine that has been pushed hard any ideas on these would be great

 

O-rings on injectors could go and so allow fuel under pressure ( std fuel pump or Walbro or better ? higher pressure may force a leak on old o-rings?) to get into heads / bore ...

The temp sensors may be failing or the wiring rusting so giving odd readings to the PFC, which then over fuels thinking it is cold / colder...?
I recall there are settings you can change for cold start enrichment etc. on the PFC hand commander, worth a play with those to see if it gets better, worse or no change.


May be stand alone but the PFC does use all the std sensors ...

 

could be set to rich

 

thanks thats the sort of answers im looking for to bounce off im gonna change the coolant temp sensor tomorrow and fit more ngk plugs but i will pull the injectors out and check the o rings in the mean time i will search the settings on the pfc or on here but your right defo worth a go i know ive seen them just have to look hard.. thanks again

 

im also gonna put the standard ecu on and see if this changes the starting problems

 

Good idea, that eliminates any mapping, setting issues from the ECU end of things.

Just leaves the mechanical bits!