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Author
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Topic: Oil pressure
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triple b
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Member # 8763
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posted
 
 
I got some funny biz with my oil pressure....it goes down when i accelerate hard on the freeway BUT if im not moving and rev my motor it doesn't drop.....pressure is going from 50psi to about 20psi at freeway speeds when i gas it if i drive normal there is no pressure drop....rebuilt 306, about 20k on motor and oil pump, deep sump pan running mobil 1 10-30 synthetic about 8 quarts....
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1988 4cyl conv 306 HCI "sasha"
2004 tahoe
Sold- 87 GT, 72 chevelle, 63 biscane, 82 monte carlo, 73 nova, 88 silverado,
Posts: 1730 | From: sacramento ca | Registered: Nov 2008
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turbo50
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Member # 6700
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posted
Id check it against another known good gauge, FIRST.
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.........when was the last time YOU built something with YOUR own hands?
I offer quality sidework at reasonable prices. PM ME
Posts: 7606 | From: Discovery Bay, California | Registered: Apr 2006
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triple b
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Member # 8763
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posted
Yeah thx i was think thats exactly what i need another analog gauge in the engine bay
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1988 4cyl conv 306 HCI "sasha"
2004 tahoe
Sold- 87 GT, 72 chevelle, 63 biscane, 82 monte carlo, 73 nova, 88 silverado,
Posts: 1730 | From: sacramento ca | Registered: Nov 2008
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89foxstang
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Member # 5908
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posted
long shot but also something to check after you verify with a known good gauge as said above would be your clearance between the bottom of the pan and your oil pickup i noticed you said that you have an aftermarket pan so its a possibility. also has this always been like this or just recently started happening?
Posts: 825 | From: Davis | Registered: Aug 2005
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FivePTSlow
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Member # 7682
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posted
quote:
Originally posted by triple b:
I got some funny biz with my oil pressure....it goes down when i accelerate hard on the freeway BUT if im not moving and rev my motor it doesn't drop.....pressure is going from 50psi to about 20psi at freeway speeds when i gas it if i drive normal there is no pressure drop....rebuilt 306, about 20k on motor and oil pump, deep sump pan running mobil 1 10-30 synthetic about 8 quarts....
Sounds like you need some n2o injected directly into your oil pump ![[Smile]](smile.gif)
Kidding... anyway I'd check the connection. I had a problem like this where the wire was frayed and only had a few strands left right at the connection point
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2011 GT/CS 5.0 + Boost(Procharger)
90 Bronco 5.8 Lifted
05 SRT-4 24PSI E-85 at least 50 million hp
07 Harley VROD NRS Stage 1
Posts: 1857 | From: Sacramento | Registered: May 2007
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93 twintrbo
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Member # 10475
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posted
I had the same symptoms right before a piece of metal lodged itself in my oil pump causing my oil pump drive shaft to snap. I dont think the oil pressure issue was related to the sudden piece of metal binding the oil pump. Upon inspection of the bottom end, it had excessive bearing clearances and I suspect it was the loose clearance that caused the oil pressure issue.
My car was a bone stock 5.0 with about 150k miles on it though. Good luck and hope your engine doesnt have the same outcome as mine did.
Posts: 42 | From: Nor Cal | Registered: Nov 2010
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triple b
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Member # 8763
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posted
My clearence is good I checked that before I put the pan it....I dont kno but I hope it a sensor the pressure is good in the morning and when I first fire it up maybe I need to do a oil change again....bad oil filter??
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1988 4cyl conv 306 HCI "sasha"
2004 tahoe
Sold- 87 GT, 72 chevelle, 63 biscane, 82 monte carlo, 73 nova, 88 silverado,
Posts: 1730 | From: sacramento ca | Registered: Nov 2008
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Blind
2.3L
CAFords OG
Member # 3052
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posted
quote:
Originally posted by triple b:
My clearence is good I checked that before I put the pan it....I dont kno but I hope it a sensor the pressure is good in the morning and when I first fire it up maybe I need to do a oil change again....bad oil filter??
oil is thicker when it's cold, so the pressure will be higher then.
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89 LX Notchback ex 4cyl, 14psi
02 Harley F150, 15psi
Posts: 8521 | From: Fairfield | Registered: Jul 2003
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triple b
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Member # 8763
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posted
seems to be working again oil pressure is stable now idk what caused it but hey thats a ford for ya.....Found On Road Dead
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1988 4cyl conv 306 HCI "sasha"
2004 tahoe
Sold- 87 GT, 72 chevelle, 63 biscane, 82 monte carlo, 73 nova, 88 silverado,
Posts: 1730 | From: sacramento ca | Registered: Nov 2008
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