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cold startup - unsure idle 200 1989

uid 18083's pic
posted by  lucid on  Wed Sep 17 13:45 CST 2003
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last visit: Fri Oct 24 12:31 CST 2014
[RELATED]

Greg, are the mornings getting chilly up there? Because those symptoms could be due to too little gas getting to the cylinders on cold/cool starts.

The reason (I'm told) is that some of it gets soaked up by porous deposits on the back of the intake valves -- maybe in the ports too(?). So even though the ECU tries to give extra fuel, the cylinders don't see it right away.

They do see it as soon as the deposits get saturated and let all the fuel pass to the cylinder. Only cure is to run something like Techron in the fuel for a tank or two.

Its most effective on short trip driving, as opposed to long trips (lots of run-soak-run-soak episodes.
--
Bruce Young,
940-NA (current)
'80 GLE V8 (Now gone)
'83 Turbo 245
'73 142 (98K)
'71 144 (track modified--and still here)
New 144 from '67 to '78
Used '62 122 from '63 to '67






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