Oil Pressure Dropping Help!!!

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smitty194

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When I stop at light or stop sign , oil pressure drops to zero pressure an car cuts off , when driving oil pressure run normal, when i stop an oil pressure drop if i press throttle it rises to normal , does any have an idea Wat is causing this

 

MFE92

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It sounds like you think the low oil pressure is causing the engine to die, but it's far more likely that it's the other way around. Something is probably causing it to stumble and die at idle, and when that happens, the RPM drops so low that the oil pressure drops below the 10-12 psi necessary to make the stock needle show pressure.

 

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a91what

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Need more info, is the engine a rebuild? How old is the oil pump? how much pressure do you have running it down the road?
I ask because i have seen the sending unit go bad and send a false reading to the gauge, but you say the car cuts out... does it die abruptly or sputter and die?
does the car have oil pressure when you first start it in the morning?

 

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smitty194

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Motor is stock303 cam , good pressure in the am , it only cuts off when press clutch to stop , it don't do it all the time tho , sometimes wen I stop everything is normal

 

a91what

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which 303 cam? b, e, f, x....ect. i would say it has nothing to do with your oil pressure. your pressure is dropping due to the engine stalling. Once again does the car jerk around or does it just die as you roll to a stop?

 

ID89GT

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Put a mechanical gauge on it, also would check the oil level itself just to rule it out.

 

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smitty194

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E 303 cam , car doesnt jerk or sputter just simply cuts off, nice an gently cuts off lol when car is not cutting off it will idle smooth rpm stays steady in one spot, but sometimes it just simply cuts off when I stop

 

a91what

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suspect the IAC or VSS probably the iac... it controls the idle of the car.

 

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smitty194

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Iac is brand New replaced it less than 300 miles ago , I just researched vss issues an some people were having same problem as me , I will get one with in the next two days an let you if it solved problem , thanks for your help

 

YLWSTANG

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#10

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I had the same issue last week on my car it ran nice no problems just would shut off. I checked my base idle and brought it up to 800 no more issues.

 

Noobz347

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smitty194 said:

Iac is brand New replaced it less than 300 miles ago ,

Click to expand...

Just wanted to comment that being brand new doesn't mean anything. It can be junk, right out of the box.

That said, with what little information you've posted, I would suspect a wiring/maf problem or vacuum leak is causing your car to stall.

Pull codes and see if anything pops up.

 

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smitty194

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K , will see if any codes come up , my gut instinct has be telling me is vac leak or maf

 

YLWSTANG

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A vacuum leak is easy to find put a hose onto the capped port on the firewall tree light a cigar and start blowing smoke in. Eventually you'll see smoke come out the air filter hopefully somewhere else before that, if there is a vacuum leak.

 

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tca7291

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^ That sounds like a fun trick! Remember to pop a beer with your cigar!

 

MFE92

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YLWSTANG said:

A vacuum leak is easy to find put a hose onto the capped port on the firewall tree light a cigar and start blowing smoke in. Eventually you'll see smoke come out the air filter hopefully somewhere else before that, if there is a vacuum leak.

Click to expand...

LOL WUT

Vacuum leaks don't leak air OUT of the system, they leak it IN.

 

Noobz347

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MFE92 said:

LOL WUT

Vacuum leaks don't leak air OUT of the system, they leak it IN.

Click to expand...

I think he means with the motor off, blow smoke in through vacuum tree through a hose. That would work great if that were the only place you could get a vac leak at.


(I sure hope MFE sees this before he heads out the car running in the garage with a cigar and garden hose)

 

MFE92

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:facepalm:

I thought he meant with the engine running

 

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smitty194

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Yea was hoping he was talking bout doing that with car off lol I'm off Fri so I will try to solve the problems an let yall no Wat the solution was

 

YLWSTANG

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MFE92 said:

:facepalm:

I thought he meant with the engine running

Click to expand...

Lol, definately with the motor off, I've done plenty of stupid things. You should meet the wife.

 

YLWSTANG

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Noobz347 said:

I think he means with the motor off, blow smoke in through vacuum tree through a hose. That would work great if that were the only place you could get a vac leak at.


(I sure hope MFE sees this before he heads out the car running in the garage with a cigar and garden hose)

Click to expand...

The firewall tree is attached to the intake so the smoke goes through the whole intake. It does work better if you block the throttle body with duct tape.