High Oil Pressure
Thread Starter
|
Freshman User
Joined: Oct 2005
Posts: 27
Likes: 0
High Oil Pressure
I have an '86 150, with a 302 efi from a '91 Crown Vic. Same motor that was in there. I just swapped the motors out and ever since, My oil pressure is running a little on the High side. The needle stays about on the "A" of normal. When I swapped the engines out, I put in a new High Vol. oil pump and had to swap the oil pans so that it would fit my truck.
I'm sort of stumped on this one. It's a new one to me.
Thanks.
I'm sort of stumped on this one. It's a new one to me.
Thanks.
Thread Starter
|
Freshman User
Joined: Oct 2005
Posts: 27
Likes: 0
Is that the same thing as the Oil pressure sending switch? the can looking thing with the stud coming off the top? IF so, then it's the one off of the '91. I didn't realize that it would give different readings.
Junior User
Joined: Nov 2005
Posts: 51
Likes: 0
High Oil Pressure
My 347 stroker with a high volume oil pump ( melling) runs exactly as you describe with a mechanical gauge it equates out to 50 psi consider yourself lucky read other posts of little or no oil pressure. if your concerned hook and keep a mechanical gauge I have both mechanical and the stock Ford dash gauge. i keep the dash gauge for sentimental reasons.... like comfort food it gives me a warm fuzzy feeling to know it at least works LMBO
Trending Topics
Fleet Owner
Joined: Sep 2005
Posts: 28,609
Likes: 18
From: Lake Tahoe, Nevada
Originally Posted by Jrog86
So that one will give off a bad reading then? So, all I do is buy a new one for a '86 150 instead of the '91??
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
Thread Starter
|
Freshman User
Joined: Oct 2005
Posts: 27
Likes: 0
Thanks, I was getting worried. I was just waiting for something to blow. That takes some pressure off of me too.
Yeah, My old motor had the little or no pressure problem. I know all about that. I once had a guy at a Super Lube tell me that the reason for the low pressure is because it's an old truck and they all just do that. I told him, "Yeah, alright. Thanks, that makes me feel better" That your actually working on my truck. ha
Yeah, My old motor had the little or no pressure problem. I know all about that. I once had a guy at a Super Lube tell me that the reason for the low pressure is because it's an old truck and they all just do that. I told him, "Yeah, alright. Thanks, that makes me feel better" That your actually working on my truck. ha
Thread Starter
|
Freshman User
Joined: Oct 2005
Posts: 27
Likes: 0
well, there's no way to be sure if the old one was good. I mean, I don't think that it worked properly before, or it was always low pressure because of the leak. But it has been sittin for 2 1/2 years. Plus, That motor is back in P'cola and I'm in J'ville. It would probably be better if I just bought a new one.
Posting Guru
Joined: Jun 2004
Posts: 1,635
Likes: 0
From: Niceville, FL.
I'm pretty sure all the '80s Ford truck oil pumps have a built in pressure relief valve that limits max pressure to 60-65 psi which on my '83 460 makes the gauge read about center of Normal.
Postmaster
Joined: May 2004
Posts: 2,854
Likes: 0
Then there's the issue of whether the threads are the same between both units.
Note: Oil pressure SWITCHS are associated with the red idiot lights, while oil pressure sending units go with gauges. Two different animals.
Note: Oil pressure SWITCHS are associated with the red idiot lights, while oil pressure sending units go with gauges. Two different animals.
Senior User
Joined: Jan 2002
Posts: 377
Likes: 0
Everyones NORMAL stock gauge reads different PSI's at the same spot in the gauge. That is one of the reasons ford didn't put numbers on the gauge as they would have correct every gauge. I run the stock gauge and a AFT MK gauge. When my stock gauge is off of the word Normal and almost pegged it is only 40PSI on the AFT MK gauge.
Posting Guru
Joined: Jun 2004
Posts: 1,635
Likes: 0
From: Niceville, FL.
74F250,
If your stock gauge is reading way high then you most likely have a bad sender, a bad gauge or somebody has misadjusted the gauge calibration screw (on front of gauge-you have to remove the cluster front panel, lens and black gauge faceplate to get to it). You don't think someone substituted a sending switch for a sending unit do you? For a quick check of the gauge and wiring substitute a 10 Ohm, 10 Watt wirewound resistor (available from Radio Shack) for the sender. The resistor should make the gauge read at the high mark. If it doesn't, the gauge, or wiring, or Instrument Voltage Regulator (IVR) is likely bad (or possibly a bad ground between engine and cab). If it does, replace sending unit. P.S., if fuel and temp gauges are also reading high, suspect the IVR. OBTW, I've got a cheap aftermarket mechanical oil pressure gauge (in my junk box) that takes about 14 psi to move the needle off zero but it does pretty well from about 40 psi and up (as compared to a Stewart-Warner mechanical gauge).
If your stock gauge is reading way high then you most likely have a bad sender, a bad gauge or somebody has misadjusted the gauge calibration screw (on front of gauge-you have to remove the cluster front panel, lens and black gauge faceplate to get to it). You don't think someone substituted a sending switch for a sending unit do you? For a quick check of the gauge and wiring substitute a 10 Ohm, 10 Watt wirewound resistor (available from Radio Shack) for the sender. The resistor should make the gauge read at the high mark. If it doesn't, the gauge, or wiring, or Instrument Voltage Regulator (IVR) is likely bad (or possibly a bad ground between engine and cab). If it does, replace sending unit. P.S., if fuel and temp gauges are also reading high, suspect the IVR. OBTW, I've got a cheap aftermarket mechanical oil pressure gauge (in my junk box) that takes about 14 psi to move the needle off zero but it does pretty well from about 40 psi and up (as compared to a Stewart-Warner mechanical gauge).