small question

i took my plugs out today and found the clyd 1 and cyld2 plugs running nice great colour but cyld 3 & 4 running rich black in colour what will be the cause of this injectors??? i checked coil packes and the readings are right

plls can someone help me on this

thanks

maybe rings

rat wrote:

maybe rings

i know im slightly under spec on cyld 3 rings but was told its fine

are you using oil? car smoking sometimes?

rat wrote:

are you using oil? car smoking sometimes?

strange enough no im not i had the pressure tested and all 3 were spec and 1 was i say extremly slightly under but no smoke or burning of oil

Can you post a pic’s of all four of your plugs, Spark-plugs reading is a bit of an art but the basic’s are easy to tell like overall richness and if there are hints of detonation and the severity also if the plug is the correct heat range

There are a number of things that could cause a cylinder or two to over-fuel or under-fuel, like the intake manifold, Fuel Rail, Injectors and boost to give a few examples.

Also to all the guys that have Walbro fuel pumps please remember that you car will start to overfuel it been proven on a few forums in the states that pump seems to overpower the stock Fuel pressure regulator resulting in an increase of fuel across the board this does not happen to all FPR’s but it’s a very common occurrence, Why I mention this is because this could also result in over fueling

Pinkfluffybunnys wrote:

Can you post a pic’s of all four of your plugs, Spark-plugs reading is a bit of an art but the basic’s are easy to tell like overall richness and if there are hints of detonation and the severity also if the plug is the correct heat range

There are a number of things that could cause a cylinder or two to over-fuel or under-fuel, like the intake manifold, Fuel Rail, Injectors and boost to give a few examples.

Also to all the guys that have Walbro fuel pumps please remember that you car will start to overfuel it been proven on a few forums in the states that pump seems to overpower the stock Fuel pressure regulator resulting in an increase of fuel across the board this does not happen to all FPR’s but it’s a very common occurrence, Why I mention this is because this could also result in over fueling

thanks pfb ill post pics now

spark plugs look funny to me the in order left to right 1 -4