Still have some problems - ahy ideas?

[David Cooley]

At 11:10 PM 12/7/1999 -0600, you wrote:


>Ok,
>
>My car is still not running quite right all of the time.
>
>Here is what I have.  On a cold start (cold engine) it won't idel
>right, I need to manually keep the rpms up.  It will run this way for
>5-8 minutes (the IAC will  e maxed at 160, MAP will be somewhere
>around 18-20), then all of a sudden the MAP will drop from that range
>down to 13-15 and the computer will then be able to control the rpm
>with the IAC valve (IAC is no longer maxed).    I don't see (or hear)
>any obvious vacuum leaks (I did find and fix one and it did not appear
>to change the idle).  The exhaust is not plugged to the best of my
>knowledge (!cat).   I just cannot figure out what is causing the
>vacuum to not be right were it should, and why all of a sudden the
>vacuum "fixes" itself.


Sounds like the ECM isn't giving enough timing advance or is trying to run 
way too lean on cold start.

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David Cooley N5XMT Internet: N5XMT at bellsouth.net
Packet: N5XMT at KQ4LO.#INT.NC.USA.NA T.A.P.R. Member #7068
We are Borg... Prepare to be assimilated!
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