At 01:54 PM 3/3/2003, Scott W. wrote:
>here. aux. air regulator is acting normal.

Hmm...no way to do the Bentley test if it won't idle cold, so how are you
determining "normal?"  Will it idle with the aux-air hose open?

>  temp 2
>sensor is fine.

By resistance or by voltage?

>ecu is fine.

Because it acts the same way with another ECU?

>  throttle switch is fine.

Wouldn't expect that to matter particularly at closed throttle.

happens with the van- start it up, cranks easily,
>fires up to idle speed, then dies suddenly. crank it
>again, and it will probobly die again, but sometimes
>it will run rough for a couple minutes before dying.

Might try squirting a bit of ether or propane into intake -- if it's lean
that will help and if it's rich will kill it quick.

Just possibly it's only starting to run well when the O2 sensor starts working?

My best guess is that either the aux-air isn't happening properly; or the
ECU either thinks it's hot (T II) or has lost the ability to richen the mix
when it's cold.  Of the three, I pick that the ECU thinks it's hot.

david

--
David Beierl - Providence RI USA -- http://pws.prserv.net/synergy/Vanagon/
'84 Westy "Dutiful Passage"
'85 GL "Poor Relation"