No oil pressure when pulling away hard from a standstill

[TylerCharger69]

He said he did that already....made a difference, but not significally.   When I toasted my main bearings as I stated above,  It wasn't necessary to re-align bore my mains.  The dial caliper still said it was perfect.  (You can actually still see factory etching on them)  I put in a new set,  let it break in properly this time,   and I have great oil pressure 7 years and counting.  The only reason I would see the need for an align bore is if you actually spun the bearing,  which this is not the case. Just 2 more cents...

[AWSOM50]

Man, I feel really stupid. 

At least I figured it out.

The sending cable was getting caught on the throttle linkage when the pedal was pressed.  There is no loss of oil pressure on this car...  Why it never happened when flooring it when driving I don't know.  And I guess the adding more oil and the improvement was a coincidence.

Looks like I have a good engine after all.  40psi at idle, 60-80 when driving.

So thanks to everyone, maybe the info in this thread will be useful to someone doing a search another time.

[RECHRGD]

Cool!!  No need to feel stupid.  The thread had a lot of good information in it and nobody thought of that one.  Nice CHEAP fix. Bob

[TylerCharger69]

It's sometimes the littlest, simplest, things when things occur.  Glad it wasn't a major problem!!!

[andy74]

my electric oil pressure guage suddenly dropped to zero while i was at 4400 rpms,and i almost had a litter of kittens,turned out the wiring was faulty and a short caused it,man did i feel some relief there!

[TylerCharger69]

Good to hear it was a electrical malfunction and not mechanical!!!    That's why I converted to manual mechanical gauges.  I just don't want to rely on electronics to tell me what my engine is doing...well....except for my AMP gauge of course.

[squeakfinder]

I use the VDO copper tubing kit part number 701 2154 for my mechanical oil pressure gauges. I've seen those plastic tubes break.

[1968Dodge]

I have the opposite problem. I've put probably less than 1,000 miles on my 440 since I built it and it holds high oil pressure all through the RPM range, but once the motor gets a good hot soak and it returns to idle, pressure drops to 10 psi and sometimes below. It will continue to idle at very low oil pressure unless you spike the throttle to pump it up every few seconds. Thinking this may be an oil pump issue, I put on a brand new Melling high-volume pump; same problem. Porosity problem in the block? I doubt any bearings are bad but I suppose it's possible- weird behavior for a bearing though. Any ideas?