Gloria: OBS build thread
Hotshot
Joined: Dec 2005
Posts: 14,380
Likes: 609
From: evansville in
Gear head does use the MAP, that is the issue. He says they can not just cut it out becuase it would cause issues for the truck going to different elevations and such. But it seems when the MAP sensor gets crammed with way more boost than it is supposed to, it starts getting messed up and does weird things.
Read it here
https://www.ford-trucks.com/forums/1...ost-huh-2.html
Read it here
https://www.ford-trucks.com/forums/1...ost-huh-2.html
Hotshot
Joined: Dec 2005
Posts: 14,380
Likes: 609
From: evansville in
Somebody needs to figure out how to use a gm map that's good for 3bar.that's what I had on my old blower mustang for the piggyback efi controller. I could tune from the drivers seat real easy...
Hotshot
Joined: Jan 2012
Posts: 11,132
Likes: 3
From: Southern West Virginia
I agree with some of the others Andrew. I would check the MAP. Since it doesn't do it in other tunes, then that leads me to think that the higher HP tunes are boosting hard enough to throw the MAP off. I would start there, and talking to the tuner.
Postmaster
Joined: Mar 2004
Posts: 3,897
Likes: 9
An easy way to tell if this is your problem is to grab a compressor regulator and plumb it into the map Lin with a max of 20-25 psi. I did that on my truck and it seems to work perfect. If you have a regulator around toss it in.
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Senior User
Joined: Mar 2007
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Have you been plugged into AE Gabe? Mine wasnt throwing low oil codes. I do have an interceptor gauge, but the conditions causing that low of oil pressure (3rd gear wide open) I never glanced at it as I was concentrating on driving. I didnt even know I was killing it until a friend monitored for me. Under normal driving conditions (when I look at it), it does fine.
Hotshot
Joined: Feb 2009
Posts: 10,410
Likes: 77
From: Plankinton, SD
Originally my bucking was a lot worse. I then put a new melling lpop on and it improved quite a bit, but still had some at the top of a big hill, pulling hard. So I'm sure thinking that is where my bucking came from. Now that I've put the resevoir addition on I haven't tried it towing yet. I never had bucking empty, but my ones aren't as oil hungry as two's either.
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Senior User
Joined: Mar 2007
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Originally my bucking was a lot worse. I then put a new melling lpop on and it improved quite a bit, but still had some at the top of a big hill, pulling hard. So I'm sure thinking that is where my bucking came from. Now that I've put the resevoir addition on I haven't tried it towing yet. I never had bucking empty, but my ones aren't as oil hungry as two's either.
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Post Fiend
Joined: Dec 2010
Posts: 10,121
Likes: 3
From: Orrville, Ohio
This is just me thinking out loud here, but if you were truly sucking the res dry, wouldn't the oil pressure light illuminate since the sender for it is threaded into the top of the reservoir? If the res is being sucked dry, the oil pressure in the res would have to go to 0 for you to do so, would it not? Isn't the sensor on top of the HPOP res the oil pressure sender (switch) that lights the light and runs the gauge?
Hotshot
Joined: Dec 2005
Posts: 14,380
Likes: 609
From: evansville in
Oil is pumped but then is in the resivour not under pressure. The hpop draws from theoretically the bottom(or close to). The resivour is just assubed to be full...I wonder..
I was reading over the weekend about the affects of a cracked pickup.the tsb stated that air entering the oil would make IPR DC skyrocket yet ICP flat line or drop. Wouldn't a resivour going dry cause similar symptoms? Its air introduced into the hpo system..
I was reading over the weekend about the affects of a cracked pickup.the tsb stated that air entering the oil would make IPR DC skyrocket yet ICP flat line or drop. Wouldn't a resivour going dry cause similar symptoms? Its air introduced into the hpo system..
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Senior User
Joined: Mar 2007
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Oil is pumped but then is in the resivour not under pressure. The hpop draws from theoretically the bottom(or close to). The resivour is just assubed to be full...I wonder..
I was reading over the weekend about the affects of a cracked pickup.the tsb stated that air entering the oil would make IPR DC skyrocket yet ICP flat line or drop. Wouldn't a resivour going dry cause similar symptoms? Its air introduced into the hpo system..
I was reading over the weekend about the affects of a cracked pickup.the tsb stated that air entering the oil would make IPR DC skyrocket yet ICP flat line or drop. Wouldn't a resivour going dry cause similar symptoms? Its air introduced into the hpo system..
Post Fiend
Joined: Dec 2010
Posts: 10,121
Likes: 3
From: Orrville, Ohio
Oil is pumped but then is in the resivour not under pressure. The hpop draws from theoretically the bottom(or close to). The resivour is just assubed to be full...I wonder..
I was reading over the weekend about the affects of a cracked pickup.the tsb stated that air entering the oil would make IPR DC skyrocket yet ICP flat line or drop. Wouldn't a resivour going dry cause similar symptoms? Its air introduced into the hpo system..
I was reading over the weekend about the affects of a cracked pickup.the tsb stated that air entering the oil would make IPR DC skyrocket yet ICP flat line or drop. Wouldn't a resivour going dry cause similar symptoms? Its air introduced into the hpo system..
I would surely think that the HPOP would be sucking air if the res went dry and then I would have thought you would see the same issues that you would when you had air in the system (funky idle, long crank times at starting, etc). So.....
You guys are the ones running these trucks, you know better than anybody what they're doing, but I just can't see stage 1s or 2s pulling the res dry with a T500 AND a HBJr. That's just me playing devil's advocate.
