Re: Nasty Idle Question

[Colin <cwass99@home.com>]

HI,
     I only wish I was :)

Cheers,
Colin


On 16-Oct-01 Mike Blain wrote:
> are you running forged aluminum pistons
> 
> Colin wrote:
> 
>>Hi,
>>     I'm quite new to this list, but I searched the archive using every
>>combination of words that seemed to fit and had no good hits. 
>>First the car:
>>
>>87 8v just over 200k
>>head completely rebuilt, polished and decked
>>stock cam
>>4 into 1 header (Pacesetter)
>>2" piping all the way back, through a high-flow cat and Dynomax muffler
>>K&N Filter
>>expanded inlet (no swiss cheese, though)
>>stock throttlebody
>>less than 5k on the valve timing belt
>>air conditioner
>>timing about 8 degrees BTDC
>>
>>The problem:
>>
>>     When it first starts on a relatively warm day, it idles like a 20 year
>>     old
>>Ford.  After it warms up for a few minutes, it smooths out and is good.  On
>>cooler days (like we've been seeing up here recently) it starts not bad, but
>>the idle goes lousy again after a couple minutes until the engine gets up
>>towards normal operating temperature.  Yes I put the O2 sensor in, and it's
>>fairly new.  Can't find any intermittent vacuum leaks and the header and
>>manifold are snug with good gaskets.
>>
>>     My question is...is the lousy idle when cold something I have to live
>>with, or can I smooth it out, even a little?  I expected it to roughen out a
>>bit with the head and exhaust, but it's really severe.  The idle bobs between
>>less than 100 and about 500 (it could be worse, I've got the warm, smooth
>>idle
>>at 1100).  I think it should be something I can resolve, but I'm out of ideas
>>on what to poke at next.  Maybe the fuel pump?  I replaced the filter about 2
>>months ago and that didn't help.
>>
>>     There's more about the car (you don't want to know how much I hate
>>balljoints...) including suspension and such, but that doesn't really apply
>>to
>>the question at hand.  Thanks for any responses.
>>
>>Cheers,
>>Colin
>>
>>
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>>
>>
> 
> 
> 
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