I have an EA II Falcon S, it is CFI. The problem is when I first start her up in the mornings it runs very smooth then after about 15-20 seconds she runs very rough until warmed up, Oh but always starts first go.
It has always done it since I have owned it.
I have done
New 2.5" exhaust, hi flow lukey muffler - - - same old cat and manifold.
All leads are fine
New spark plugs
New hydraulic lifters
New timing chain and all other related parts
New clutch fan - - - thermos coming soon
Fully synthetic oil - - - not contaminated by water (water not contaminated by oil either)
When I start the car it spits black water out the exhaust, when the car has been running for about 5 min it runs smooth as.
Could it just be a blocked cat?
Can someone help its driving me crazy!!!!!!!!!!!!!!
Good by my EA S Pack
never late in a V8
K&N air filter
XR8 intake snorkle
High flow exhaust/cats/hm headers
Clear front & side indicators