5ktq Possessed oil pressure auto check

[Grant Lenahan]

yea, its the pressure sender ( high/low pressure switch. dont recall if there's one or two. I think two.

Grant
On Oct 19, 2010, at 8:02 PM, John Cody Forbes wrote:

> It's interesting these days after 10 years and having owned 8 (as many as 4 drivable at once and currently 3) that 5000's can still come up with new issues to bug me. 
> 
> Patient: My "fast" '87 5ktq. 
> 
> Symptom: Auto-check oil pressure warning comes on only at idle and about 75% of the times the engine goes to idle (ie most stop lights).
> 
> I have checked the black .3 bar oil pressure switch, it seems to do it's job correctly. Oil pressure via mechanical gauge is great. Tonight I unplugged and made safe the wire for the black switch and the problem persists. I did verify via bentley wiring diagram that the correct wire is on the correct switch.
> 
> Any BTDT before I start tearing in to this thing? The autocheck triggers on ground to mean low pressure so it can't be an intermittent open, it's got to be an intermittent ground or a bad autocheck.
> 
> 
> -Cody (mobile)
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Grant Lenahan
glenahan at vfemail.net