Re: 2003 Accord Throttle Surging Problem/P0505

On Apr 5, 12:39 pm, motsco_ <mots...@[EMAIL PROTECTED]
> wrote:
> penthor_...@[EMAIL PROTECTED]
 wrote:
> > My 2003 Accord is experiencing a throttle surge problem similar to
> > what I have read about in this ng.  6 cyl.  No other apparent
> > problems.  120K on plugs.  27mpg.
>
> > It warms up OK.  Then it begins surging between 1000rpms to 2000rpms.
> > Up and down continuously surging.  It happens when it's sitting still
> > or when being driven.  Cruise on or off doesn't make a difference.
> > Using an Actron code reader I get a "pending"  P0505 (Idle Control
> > System Malfunction) which seems reasonable.  I don't know where to
> > start to address this problem.  Any advice would be greatly
> > appreciated.
>
> > Penthor
>
> ======================
>
> (since you're supposed to check this part anyhow) The first (cheapest)
> place to start is your cooling system. Just make sure there's coolant up
> to the underside of the rad cap and the reservoir should be filled up to
> the MAX mark. Once the engine is warm it preheats the throttle body (and
> several computer sensors) with hot coolant so it can screw up your idle
> if there's AIR in the system.
>
> Honda premix is a safe one.
>
> 'Curly'

Coolant level is full.