[pgfpro]

From my back ground, tuning different engine management systems. The coolant temperature plays the biggest role when it comes to fuel enrichment.

When I do a tune on a stand alone management system the first thing I build is the fuel table. Then the ignition table. Then the fuel enrichment tables.

On cold start, the engine will struggle to stay running without cold enrichment able. On cold start you can get away with running a IAT table disable, but not the coolant enrichment table.

When comparing the two, the coolant table will always have more enrichment then a coolant table (added pulse width to the fuel table). This is because the fuel will stick to the combustion walls and cylinders until they warm up. The fuel fall out attracts the light weight fuel infractions and makes the problem even greater.

IMO if I had to weigh out the two enrichment tables I would say the coolant has around a75% enrichment to the IAT's enrichment 25%.