A damaged pressure sender unit can work for a while and then fail
after several minutes or hours of driving. Shortly after I got my car,
the light started going on during idle at the end of 30-minute trips.
I started to freak out, but a new sender cured the problem.
Doug Braun
'72 Spit
At 03:38 PM 7/17/02 -0400, Greg Rowe wrote:
>Well spitfires are notorious for slow pressure build-up at
>start-up ('specially if you're using a non-non-draining oil
>filter). But once pressure builds, it should stay up. I
>don't think that low pressure at idle is a big deal, but it
>may be symptomatic of low pressure across the entire rev range.
>The 5W-30 oil probably isn't helping (try 20W-50).
>
>I think the oil gauge is very sensible since you really want
>to check pressure at engine speeds other than just idle.
>
>Good luck!
>
>Greg Rowe
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