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The Toyota Service Manual wants the idle up speed to be adjusted to 1250 rpm. I see a diaphragm valve operating this feature on my lift truck. Is this the same as the cold start elevated idle on carbureted cars?
The truck has a 4Y dual fuel engine, now operated on propane.
  • Posted 9 Jul 2019 10:56
  • By Georg
  • joined 7 Mar'14 - 20 messages
  • Ontario, Canada
1998 426FGCU25 Ser No 67740

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From the forum discussions …
"Unicarriers - it would have to be for a dual fuel unit also. Usually a bad cam or crankshaft sensor will throw a E-27 or a E-28 code on the dash panel... If it does not light up and the bulb is bad then it will not start also."
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