4kq engine performance questions

R Mangas porter_dog at hotmail.com
Mon Dec 16 11:50:13 EST 2002

  I didn't see the oft-implicated thermo sensor on your list of stuff that's
ok; if it was bad you could be lean at cold start and fine when hot,
richening up your mix fixed the first and hurt the second.  Have you checked


>From: CTDiesel at aol.com
>To: quattro at audifans.com
>Subject: 4kq engine performance questions
>Date: Mon, 16 Dec 2002 11:08:01 EST
>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
>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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