Frank rafferty

Hi all, just a quick question , have a sapphire cosworth rally car , running 803 green injectors 3 bar map sensor, lately got engine rebuilt, got car running but it's seriously over fuelling , plugs are black after a few minutes running , also fitted new blue coolant sensor and black/brown air temp sensor , plugs are iridium ngk , what else could cause the over fuelling

grcossie

Map sensor. Do you have any engine monitor?

Frank rafferty

The map sensor is 3 years old, it was replaced before just to keep electrical stuff fresh ,no engine monitor for

cossie2

which ecu p8 or l8..

Frank rafferty

Its the level 6 , 2wd sapphire, has a stage 3 chip too

martysmartie

iTrader: (1)

Check the MAP sensor hose is connected and in good condition.

Martin

Mad_Mat

Check fuel pressure regulator.
Standard setting is 3.5bar with reference hose disconnected.

Frank rafferty

Ill have another look this evening , i set fuel pressure reg to 45/50 psi i think which is around 3 bar , have a standard fuel pressure reg i can try on it anyway, i mite give the injectors a clean out too incase they are leaking or blocked

Bart

Did you adjust co screw to correct setting?

Frank rafferty

Never went near the co2 screw at all , i just checked and the map sensor wasn't replaced 3 years ago , but could it go faulty if it was just sitting around

grcossie

Have it been stored inside? Check the vacum hose to map, that can be worn. If it`s stored outside, rain can come into map plug through bonnet vent. Also seen some header thanks With cracks, thats leak into map plug. Before i move my map, to above inlet, i got rain in it, and my monitor showed 3bar boost with just ignition on, overfuel like hell.