<VV> Spyder Temp-Press light diagnosis - update

Hugo Miller hugo at aruncoaches.co.uk
Mon Dec 2 12:33:52 EST 2019

Sounds more like an over-sensitive temp sensor to me?

On 2019-12-02 12:14, Doug Mackintosh via VirtualVairs wrote:
> A new piece of information: Today I drove the car to run a couple of
> local errands. Total trip probably about 5 miles. Everything was
> normal until about the half-way point when the Temp-Press light came
> on and stayed on for the rest of the trip. At one of my intermediate
> stops, I pulled the connector off the Pressure switch while it was
> running, and the light stayed on (so it was not grounding through the
> switch). The engine temperature at this point was low (not even 
> warmed
> up) and there was no buzzer. Before I shut it off after getting home
> it was still illuminated. Less than an hour later I went out and
> turned the ignition on (the light came on as it should) then
> disconnected the wire from the oil pressure switch and the light went
> off (as it should).
> So it looks like it is a short to ground in the Oil pressure warning
> wiring somewhere between the switch and the dashboard, and it appears
> to be intermittant but "sticky", possibly temperature related, then
> un-shorting when it cools off. Next step will be to try to find where
> the wiring is shorting to ground. 
>> On Dec 1, 2019, at 4:53 PM, Doug Mackintosh via VirtualVairs 
>> <virtualvairs at corvair.org> wrote:>> OK guys, I am looking for some 
>> ideas or experience-based explanations for a problem I have had.> The 
>> car is my daughter's 1964 Spyder. Have been driving it regularly with 
>> no problems. I recently drove it to Farmville (a little over 1 hour 
>> away). When I drove back home about 10 minutes from home the 
>> Temp-Press light came on and stayed on.> There were no other symptoms. 
>> The temperature gage did not go into scary territory, there was no 
>> lifter clacking, loss of performance, problems idling at stops etc. 
>> The fan belt was still on. No noises. Oil level OK.> I continued 
>> driving home and switched it off (the light stayed on the whole time 
>> until I switched it off).> I figured it most likely was either a 
>> pressure sensor failure or a shorted wire. Today (5 days later) I did 
>> some diagnostics by testing the light status after disconnecting the 
>> pressure sensor wire, then after grounding the pressure wire and then 
>> the temperature warning wire heading to the dash. Based on my testing 
>> everything was working as it should with the engine off. I then 
>> started the engine and the light went off as normal after it started.> 
>> So at this point it seems to have "fixed" itself.> Ideas?
> -- Doug Mackintosh Corsa member since 1996 Corsa/NC member since
> 1996, Virtual Vairs member Corvair owner 1969-1971 and 1996-on
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