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7.3 Oil Light stays on for 5 seconds

632 views 3 replies 3 participants last post by  JMF350 
#1 ·
Anybody ever had the oil idiot light stay on every time you start the engine. It stays lit up for about 5 seconds. i don't rememeber this haappening before. 03 E350 15' box van 7.3 with 70k . The dealer replaced the high volume oil pump under warranty( 100.00 out of my pocket) but it the same problem. Any ideas ? The oil pressure guage moves when the engine starts, like it works normally. I even changed the oil and filter just make sure that was not the problem.
thanks
 
#4 ·
The oil pressure gauges on ALL 7.3's and 6.0's are mis-leading. They are not actual pressure gauges but just an on/off switch. If you have 5 psi. or more oil pressure... it reads half gauge. If it is 4 psi. OR LESS... it reads zero. The sender also reads off the low pressure pump (as stated above), so the HP pump shouldn't have been bothered unless you had other driveability concerns.
 
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