4kq engine performance questions

CTDiesel at aol.com CTDiesel at aol.com
Mon Dec 16 11:08:01 EST 2002

Let me explain forgive me in advance for the long detail:

I've had a hard time starting my car and had real hesitation when i'd first
go each morning (first start).  All electricals are working to specs,
thermo-time switch, o2 sensor, diff. pressure reg, cold start valve.   Then i
decided to turn the air/fuel mixture (3mm T) screw to richen the mixture.
Voila!!  problems went away.  Car pops right off when its cold and no
hesitation when you first go.  HOWEVER, the problem has changed now.  When
the engine is warm and you go to accelerate from a stop, there is a huge
hestitation.  Almost reverse of the first problem.

Can anyone give me ideas as to what to do?


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