what do you all think?

noom14921992 · 11-15-2008, 07:02 PM

ok i just read a post about the oil pressure gauge. mine does some thong similar. when the engine is cold and the oil pressure is 20. once it gets warm it drops to 0. if you give it gas it climes. at full acceleration it might go to 40. it does not click,knock,ping,or any thing it just drives perfect.. so i read that it is most likely the oil pressure sensor. is that right? i know i need to go to a shop and get the pressure checked but i just have not had time. would an oil change place be able to do the pressure check?

thanks to all any input will be greatly appreciated.

noom14921992 · 11-16-2008, 02:51 PM

i was driving to day and it still drives good but the gauge is scaring me. i still think the thing is defunct. like when the engine is cold it would seem the gauge works but once the engine gets warm it goes to low pressure until you give it gas.

thanks and i would like an answer because it is my daily drive and i cant afford to hurt the motor

87c10slammer · 11-19-2008, 10:23 PM

i would replace the oil pressure sensor... it seems to be temp related but its still at fault... one wayto check and make sure you have oil pressure is to check your oil before you start the truck in the morning when its cold out then drive to work, school, etc and then check it again... if i reads low then oil is moving around in the engine like it should.... or you could use a can of seafoam and dump it in your oil and clean the hell out of the thing and then change the sensor to eliminate all possiblitites besides the pump itself

noom14921992 · 11-19-2008, 11:15 PM

well i have checked mt oil when the engine is cold and it is in the normal range and once the gauge says low oil pressure i checked it and it was at the same place. and i did seafoam it and it made it run better and i would have to say that is once it started to do the LOP thing

thanks what do you all thing

MikeInCtown · 11-20-2008, 10:11 AM

If you added any seafoam to your oil, make sure you change it almost immediately. that stuff is made to clean out the gunk and get the sludge into the bottom of the engine which is bad because you can clog your oil pump screen if there is enough of it. it will also thin your oil, which you may not really want or need at this point.

Get a new pressure sensor/sending unit and get it installed. if the oil pressure is really at 0 then the engine should get shut down by the computer. IIRC there may be two sensors, one for your guage and one for the computer.

Yogi · 11-20-2008, 11:43 AM

Quote: Originally Posted by MikeInCtown

If you added any seafoam to your oil, make sure you change it almost immediately. that stuff is made to clean out the gunk and get the sludge into the bottom of the engine which is bad because you can clog your oil pump screen if there is enough of it. it will also thin your oil, which you may not really want or need at this point.

Get a new pressure sensor/sending unit and get it installed. if the oil pressure is really at 0 then the engine should get shut down by the computer. IIRC there may be two sensors, one for your guage and one for the computer.

Sort of....... One sensor but 2 wires: 1 for the gauge and 1 for the fuel pump relay.

But I agree. Replace the sensor right away.

noom14921992 · 11-20-2008, 12:27 PM

well i plan on it but first i don't know if i have the 2 or 3 prong sensor. and then secondly it is almost imposable to get to the sensor. some one said to take the distributor of but that did nothing it was much lower(more like an inch but with big hands impossibly to low for me)and i went to the junk yard and it was so perfect the top of the engine was gone and the bottom was all that was left and the sensor was like on a silver platter but i first did not know or have the correct size tool to get it off and it was on there like nothing else. the sensor is going to be $20 from junk yard, $30 for 2 prong new, and $50 for 3 prong new. is there a secret to getting these off?

thanks to all

Yogi · 11-20-2008, 02:33 PM

Sorry for the confusion. It should be 3 wires: 2 for the FP relay and 1 for the gauge.

Don't pay so much! Their only $30 for the 3 wire at Rock Auto.com

noom14921992 · 11-20-2008, 02:35 PM

Thanks so much. I will see about ordering one soon. But with Christmas right around the corner i don't know.

But thanks again

blazerman · 11-20-2008, 02:35 PM

i had the same problem.ended up being the beginning stages of the intake gasket going out.but i dont know what motor you have

noom14921992 · 11-20-2008, 02:40 PM

i hope it is not that. it still drives perfect. what are some symptoms of a going out intake gasket?

thanks

btw i have the 4.3

MikeInCtown · 11-20-2008, 02:59 PM

I don't know what they look like now, but there used to be a special socket that basically did every oil sensor out there.

if your guage is reading that low, screw Christmas presents. Better to spend the $50 now than worry about where you'll come up with a grand for an engine overhaul or replacement.

blazerman · 11-20-2008, 03:34 PM

Quote: Originally Posted by noom14921992

i hope it is not that. it still drives perfect. what are some symptoms of a going out intake gasket?

thanks

btw i have the 4.3

it had low pressure for a while.then outta the blue i cranked it to leave work and there was a loud clicking from the valves so i limped it home and tore it down.

but im not saying thats what your problem is.

blazerman · 11-20-2008, 03:35 PM

Quote: Originally Posted by MikeInCtown

I don't know what they look like now, but there used to be a special socket that basically did every oil sensor out there.

if your guage is reading that low, screw Christmas presents. Better to spend the $50 now than worry about where you'll come up with a grand for an engine overhaul or replacement.

yeah,its just a socket.it has rounded corners on the sensor.a;so,you might have to pull the distributor to get it out.all depends

noom14921992 · 11-20-2008, 10:53 PM

well i am going to do that this week end. but where can i get an oil preesure test done ?

Yogi · 11-21-2008, 11:13 AM

Quote: Originally Posted by noom14921992

well i am going to do that this week end. but where can i get an oil preesure test done ?

That would be difficult and expensive. A shop would have to pull the existing sending unit and install a "T" fitting to run the sending unit plus a test gauge, then test the pressure. After testing, they would have to remove the T and reinstall the sending unit. It would be a lot cheaper just to replace the sending unit.

11-15-2008, 07:02 PM	#1
noom14921992 Registered User Join Date: Jul 2008 Posts: 96 Location: User is: OffLine	what do you all think? ok i just read a post about the oil pressure gauge. mine does some thong similar. when the engine is cold and the oil pressure is 20. once it gets warm it drops to 0. if you give it gas it climes. at full acceleration it might go to 40. it does not click,knock,ping,or any thing it just drives perfect.. so i read that it is most likely the oil pressure sensor. is that right? i know i need to go to a shop and get the pressure checked but i just have not had time. would an oil change place be able to do the pressure check? thanks to all any input will be greatly appreciated.
	[Reply w/Quote]

11-16-2008, 02:51 PM	#2
noom14921992 Registered User Join Date: Jul 2008 Posts: 96 Location: User is: OffLine	Re: what do you all think? i was driving to day and it still drives good but the gauge is scaring me. i still think the thing is defunct. like when the engine is cold it would seem the gauge works but once the engine gets warm it goes to low pressure until you give it gas. thanks and i would like an answer because it is my daily drive and i cant afford to hurt the motor
	[Reply w/Quote]

11-19-2008, 10:23 PM	#3
87c10slammer Registered User Age: 25 Join Date: Jul 2008 Posts: 391 Location: User is: OffLine	Re: what do you all think? i would replace the oil pressure sensor... it seems to be temp related but its still at fault... one wayto check and make sure you have oil pressure is to check your oil before you start the truck in the morning when its cold out then drive to work, school, etc and then check it again... if i reads low then oil is moving around in the engine like it should.... or you could use a can of seafoam and dump it in your oil and clean the hell out of the thing and then change the sensor to eliminate all possiblitites besides the pump itself
	[Reply w/Quote]

11-19-2008, 11:15 PM	#4
noom14921992 Registered User Join Date: Jul 2008 Posts: 96 Location: User is: OffLine	Re: what do you all think? well i have checked mt oil when the engine is cold and it is in the normal range and once the gauge says low oil pressure i checked it and it was at the same place. and i did seafoam it and it made it run better and i would have to say that is once it started to do the LOP thing thanks what do you all thing
	[Reply w/Quote]

11-20-2008, 10:11 AM	#5
MikeInCtown Registered User Age: 35 Join Date: Feb 2008 Posts: 927 Location: User is: OffLine	Re: what do you all think? If you added any seafoam to your oil, make sure you change it almost immediately. that stuff is made to clean out the gunk and get the sludge into the bottom of the engine which is bad because you can clog your oil pump screen if there is enough of it. it will also thin your oil, which you may not really want or need at this point. Get a new pressure sensor/sending unit and get it installed. if the oil pressure is really at 0 then the engine should get shut down by the computer. IIRC there may be two sensors, one for your guage and one for the computer.
	[Reply w/Quote]

11-20-2008, 11:43 AM	#6
Yogi Registered (Ab) User Join Date: Feb 2008 Posts: 4,093 Location: League City, TX (Houston) User is: OffLine	Re: what do you all think? Quote: Originally Posted by MikeInCtown If you added any seafoam to your oil, make sure you change it almost immediately. that stuff is made to clean out the gunk and get the sludge into the bottom of the engine which is bad because you can clog your oil pump screen if there is enough of it. it will also thin your oil, which you may not really want or need at this point. Get a new pressure sensor/sending unit and get it installed. if the oil pressure is really at 0 then the engine should get shut down by the computer. IIRC there may be two sensors, one for your guage and one for the computer. Sort of....... One sensor but 2 wires: 1 for the gauge and 1 for the fuel pump relay. But I agree. Replace the sensor right away.
	[Reply w/Quote]

11-20-2008, 12:27 PM	#7
noom14921992 Registered User Join Date: Jul 2008 Posts: 96 Location: User is: OffLine	Re: what do you all think? well i plan on it but first i don't know if i have the 2 or 3 prong sensor. and then secondly it is almost imposable to get to the sensor. some one said to take the distributor of but that did nothing it was much lower(more like an inch but with big hands impossibly to low for me)and i went to the junk yard and it was so perfect the top of the engine was gone and the bottom was all that was left and the sensor was like on a silver platter but i first did not know or have the correct size tool to get it off and it was on there like nothing else. the sensor is going to be $20 from junk yard, $30 for 2 prong new, and $50 for 3 prong new. is there a secret to getting these off? thanks to all
	[Reply w/Quote]

11-20-2008, 02:33 PM	#8
Yogi Registered (Ab) User Join Date: Feb 2008 Posts: 4,093 Location: League City, TX (Houston) User is: OffLine	Re: what do you all think? Sorry for the confusion. It should be 3 wires: 2 for the FP relay and 1 for the gauge. Don't pay so much! Their only $30 for the 3 wire at Rock Auto.com
	[Reply w/Quote]

11-20-2008, 02:35 PM	#9
noom14921992 Registered User Join Date: Jul 2008 Posts: 96 Location: User is: OffLine	Re: what do you all think? Thanks so much. I will see about ordering one soon. But with Christmas right around the corner i don't know. But thanks again
	[Reply w/Quote]

11-20-2008, 02:35 PM	#10
blazerman Ted's emporium. Join Date: Jan 2002 Posts: 6,390 Location: usa User is: OffLine	Re: what do you all think? i had the same problem.ended up being the beginning stages of the intake gasket going out.but i dont know what motor you have
	[Reply w/Quote]

11-20-2008, 02:40 PM	#11
noom14921992 Registered User Join Date: Jul 2008 Posts: 96 Location: User is: OffLine	Re: what do you all think? i hope it is not that. it still drives perfect. what are some symptoms of a going out intake gasket? thanks btw i have the 4.3
	[Reply w/Quote]

11-20-2008, 02:59 PM	#12
MikeInCtown Registered User Age: 35 Join Date: Feb 2008 Posts: 927 Location: User is: OffLine	Re: what do you all think? I don't know what they look like now, but there used to be a special socket that basically did every oil sensor out there. if your guage is reading that low, screw Christmas presents. Better to spend the $50 now than worry about where you'll come up with a grand for an engine overhaul or replacement.
	[Reply w/Quote]

11-20-2008, 03:34 PM	#13
blazerman Ted's emporium. Join Date: Jan 2002 Posts: 6,390 Location: usa User is: OffLine	Re: what do you all think? Quote: Originally Posted by noom14921992 i hope it is not that. it still drives perfect. what are some symptoms of a going out intake gasket? thanks btw i have the 4.3 it had low pressure for a while.then outta the blue i cranked it to leave work and there was a loud clicking from the valves so i limped it home and tore it down. but im not saying thats what your problem is.
	[Reply w/Quote]

11-20-2008, 03:35 PM	#14
blazerman Ted's emporium. Join Date: Jan 2002 Posts: 6,390 Location: usa User is: OffLine	Re: what do you all think? Quote: Originally Posted by MikeInCtown I don't know what they look like now, but there used to be a special socket that basically did every oil sensor out there. if your guage is reading that low, screw Christmas presents. Better to spend the $50 now than worry about where you'll come up with a grand for an engine overhaul or replacement. yeah,its just a socket.it has rounded corners on the sensor.a;so,you might have to pull the distributor to get it out.all depends
	[Reply w/Quote]

11-20-2008, 10:53 PM	#15
noom14921992 Registered User Join Date: Jul 2008 Posts: 96 Location: User is: OffLine	Re: what do you all think? well i am going to do that this week end. but where can i get an oil preesure test done ?
	[Reply w/Quote]

11-21-2008, 11:13 AM	#16
Yogi Registered (Ab) User Join Date: Feb 2008 Posts: 4,093 Location: League City, TX (Houston) User is: OffLine	Re: what do you all think? Quote: Originally Posted by noom14921992 well i am going to do that this week end. but where can i get an oil preesure test done ? That would be difficult and expensive. A shop would have to pull the existing sending unit and install a "T" fitting to run the sending unit plus a test gauge, then test the pressure. After testing, they would have to remove the T and reinstall the sending unit. It would be a lot cheaper just to replace the sending unit.
	[Reply w/Quote]