ianxbrown
Joined: 16 May 2009
Posts: 80
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 Posted: Wed Sep 14, 2011 12:43 pm Post subject: RV-List Digest: 9 Msgs - 09/13/11 |
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Greg,
Two suggestions:
1. The mass of the cylinder head is unable to give temps that fluctuate
wildly unless you mean changing over several minutes. Short term
fluctuations are going to be due to the sensor and it's associated wiring.
Since you're measuring very small voltages, you're susceptible to any
induced volts where the sensor lead passes through the firewall, and maybe
close to other wiring. Suppliers often suggest routing the sensor wires
through a different port in the firewall.
2. Does anything else change upon landing, like lower alternator output,
lower current draw on other devices, lights turned off, or whatever? I'd
expect only lower readings because of lost volts. Was "out of range"
downwards? A bad crimp or bad pin retention is likely to be the villain if
you're only seeing readings fluctuate downwards. I've had a couple of cases
where a pin or contact looked good but pushed out when the connector was
mated.
Ian Brown,
Bromont, QC
Thanks. Interesting that it cools down and becomes normal moments after
| Quote: | landing. But not on a long descent. Airflow thru cowl affecting poor
crimp connection. Will recrimp wires and clean injectors this weelend.
Greg
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