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Oil Pressure Problems
#1
88 Mustang - 4cylinder

Fresh oil + Filter.

When initially started, fantastic oil pressure, once warmed up oil pressure goes to almost Zero @ idle but oil pressure is OK as long as RPMS are up.

After being driven for about 20 minutes, oil pressure keeps dropping, increased RPM helps boost oil pressure but less and less. About a 1/2 hour after being warmed up, oil pressure becomes non existant @ idle and VERY LOW, no matter what rpm.

The motor sounds and runs fine.

Any ideas?

I'm thinking oil pump and/or screen might be clogged...i dont think its the gauge.

TIA
97 LSC - blk/blk, Sniper Tuned, 13"cobra brakes, 05+ staggered saleen wheels, hubswapped, kybs, ss shock mounts, ss brake lines, JMOD, 4.10s, eaton truetrac, 8000k hid's, spider valve v3, x pipe, 3rd cat deleted, lms muffs, air silencer delete, k&n, 160* Tstat & MUCH More.
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#2
I'd say oil pump/screen - but for shits n' giggles, how many miles are on it?

I've had quite a few windstars w/ the 3.8 have this very problem - dropped the oil pan - and NOTHING but crud n' shit on the inlet screen...(pump was ok)
Babies stay on the bottle, real men get blown! :dunce:
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#3
like 80,000

it hasnt been driven for 7 years...so i figured it was just viscosity break down, until i changed the oil and it had the same problem.
97 LSC - blk/blk, Sniper Tuned, 13"cobra brakes, 05+ staggered saleen wheels, hubswapped, kybs, ss shock mounts, ss brake lines, JMOD, 4.10s, eaton truetrac, 8000k hid's, spider valve v3, x pipe, 3rd cat deleted, lms muffs, air silencer delete, k&n, 160* Tstat & MUCH More.
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#4
Its probably parrafin wax and carbon deposits being sucked off the bottom of the pan (as SVT said). Drop your pan and check for that. It also wouldnt hurt to pull a couple of main and rod caps to check your bearings.
ASE Master Tech with 15 years experience


Daily Driver: 1994 GMC Sonoma, Extended Cab, 2WD, with the 4.3 V6 Vortec.
Future plans/projects: Finishing that darn 64 Malibu SS
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#5
I'd recommend that you do not trust the factory gage. Check to make sure of the oil pressure before you do anything else!!!!
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