No Pressure after Oil Change

Eagle2000GT · March 2nd, 2011, 08:05 PM

Over the years I have done hundreds of oil changes on dozens of cars that I've owned. Today, changing the oil after putting in Mobile 1 oil and a new Mobile 1 filter I had no oil pressure whatsoever. No leaks. Dipstick said plently of oil. I put the odometer in test mode, no oil pressure. I put the old oil filter back on and oil pressure came back.

Just curious, have any of you gotten a bad filter before?

casper gt · March 2nd, 2011, 08:09 PM

I've never gotten one in a car (knock on wood

) but I see it all the time on Cummins ISX motors in heavy trucks.

Shaun03GT · March 2nd, 2011, 08:31 PM

Thats wierd. When you put the old filter on you were getting oil pressure? That doesnt seem right

Evil Klown · March 2nd, 2011, 08:55 PM

either the new filter isnt the right one (just because u buy it new doesnt mean its not bad) or two orings are installed on the new filter...check the filter

03SonicBoom · March 2nd, 2011, 09:02 PM

Originally Posted by Evil Klown

either the new filter isnt the right one (just because u buy it new doesnt mean its not bad) or two orings are installed on the new filter...check the filter

Double stacking o-rings will cause it to leak like crazy when the car is turned on.

Eagle2000GT · March 2nd, 2011, 11:34 PM

Originally Posted by Shaun03GT

Thats wierd. When you put the old filter on you were getting oil pressure? That doesnt seem right

It does if the new filter is clogged and not letting oil through.

As I said, in the hundreds of oil changes I've done, I've never had that happen before. By the way, they gave me a refund on the oil filter.

By the way, the O-rings were not double stacked, and there were no leaks. Just no flow through the filter.

KV007 · March 2nd, 2011, 11:35 PM

Originally Posted by 03SonicBoom

Double stacking o-rings will cause it to leak like crazy when the car is turned on.

did it the other day. 5 gallons on our nice ass floor. well lets just say i wont do that again

F8L GT · March 2nd, 2011, 11:36 PM

Thats good they gave you a refund. Im running the same setup in my car and never had a problem. My guess is a bad filter

F8L GT · March 2nd, 2011, 11:36 PM

Originally Posted by KV007

did it the other day. 5 gallons on our nice ass floor. well lets just say i wont do that again

5 gallons? what the hell were you filling?

Eagle2000GT · March 2nd, 2011, 11:53 PM

Originally Posted by F8L GT

Thats good they gave you a refund. Im running the same setup in my car and never had a problem. My guess is a bad filter

Yes. Mobile 1 oil and filters are exceptionally good products. I seem to have got the one in a million bad filter. The moral of this story is "if you suspect something is wrong, don't run you motor." Even if you put excellent products in it.

Hell, my first thought was I didn't put the plug back in the oil pan. (It's happend before. I'm old. Don't ask me about this.)

BaznastyDave · March 3rd, 2011, 01:19 AM

I have heard of this problem in a LS1 using a Fram filter before, stuff happens i guess.

Dutch 09 · March 3rd, 2011, 02:01 AM

LMAO........5 GALLONS? of WHAT WHERE?

03SonicBoom · March 3rd, 2011, 09:58 AM

Originally Posted by KV007

did it the other day. 5 gallons on our nice ass floor. well lets just say i wont do that again

I think a lot of people have done it once. When I was in middle school and just learned to change my oil, I did it. You'll do it once and [hopefully] never do it again.

I think you ment 5 quarts, not 5 gallons.

Loki · March 3rd, 2011, 10:04 AM

I'm having a problem with my care after changing oil, too. Also used a Mobil1 filter....But I also used fi cleaner and engine cleaner, so....I doubt its related. Just won't start for shit when its cold, have to floor the gas and let it sputter rpms until it finally forces through. I'm thinking the cleaners clogged something up with gunk old oil. Not on a Mustang, though, so completely unrelated here. Didn't mean to hijack. Lol

Eagle2000GT · March 4th, 2011, 07:56 AM

Update: I went out to start the car last night and no oil pressure again. It has to be coincidence and unrelated to changing the oil.

Perfectcircle · March 4th, 2011, 08:11 AM

I don't know about these motors but the oil pressure sending gauge on my jeep is right next to the oil filter, if this is the case in our mustang motors then it is likely you wacked it by accident, have a loose connection etc. Are you running a separate oil pressure gauge or just going by what the one on the dash says? The stocker isn't much to pay mind to.

gt_andy · March 4th, 2011, 11:00 AM

I have a 2000GT also doing the same thing. I can start it up and it has pressure and then drops. The car sounds and seems to run just fine with no knock or any issues... After I rev it up a little or it warms up it appears to get full pressure. Im assuming it is a sensor... or the oil pump is starting to go out..

Please help me.. i will be pulling this thing out soon.

Eagle2000GT · March 4th, 2011, 11:23 AM

Update: After two trips to the parts store I've got oil pressure again. Evidently Ford made a mid-year change. My 2000 GT has a 2001 Oil Pressure Switch. I guess I gave Mobile 1 a bad rep when it wasn't necessary. I wonder what the odds are of the switch going out during an oil change?

Perfectcircle: Yes, the switch is located next to the oil filter and is easy to change. And, you are correct about the stock gauge. It doesn't really measure oil pressure. Its basically an idiot light with a needle. Above 6 psi it will read the middle of the gauge. Below 6 psi it reads zero.

gt andy: It is most likely your switch. It costs $40 at Ford and $9 at Autozone.

KV007 · March 4th, 2011, 12:23 PM

yes 5 quarts haha sorry

0949er · March 4th, 2011, 12:30 PM

I dunno about you guys but when ever I pull my filter off even if im trying to be careful I still get oil all over that sensor. Bound to make it go out eventually.

March 2nd, 2011, 08:05 PM	#1
Eagle2000GT I Post Entirely Way Too Much 2000 Mustang GT 12.73@111.36 Join Date: Aug 2007 Location: Shelbyville, IN Posts: 5,311 iTrader: 1 reviews	No Pressure after Oil Change Over the years I have done hundreds of oil changes on dozens of cars that I've owned. Today, changing the oil after putting in Mobile 1 oil and a new Mobile 1 filter I had no oil pressure whatsoever. No leaks. Dipstick said plently of oil. I put the odometer in test mode, no oil pressure. I put the old oil filter back on and oil pressure came back. Just curious, have any of you gotten a bad filter before? __________________ ProCharger P-1SC, 9 psi, STD 396/383; Uncorrected 388/375; SAE 383/370 Mods list in Garage.

March 2nd, 2011, 08:09 PM	#2
casper gt Moderator 2012 300a gt auto 12.10@116 Join Date: Mar 2008 Location: creighton pa Posts: 7,697 iTrader: 4 reviews	I've never gotten one in a car (knock on wood ) but I see it all the time on Cummins ISX motors in heavy trucks. __________________ MM BRACKET RACING CREW CO-FOUNDER BAMA Performance Drag Team Founder 2012 300a GT auto

March 2nd, 2011, 08:31 PM	#3
Shaun03GT I Post Entirely Way Too Much 2003 Mustang GT 1/8 - 7.92 @ 91.13mph 1/4 - 12.21 @ 115.84mph Join Date: Sep 2009 Location: Weymouth, MA Posts: 13,447 iTrader: 12 reviews	Thats wierd. When you put the old filter on you were getting oil pressure? That doesnt seem right __________________ Vortech V1 Intercooled @ 11psi 394rwhp/392rwtq @ 9.5psi 415rwhp/400rwtq @ 11psi on Methanol Tuned By: Pete @ Performance Dyno Affordable Supercharger Build Guide Supercharger Info for Noobs

March 2nd, 2011, 11:36 PM	#8
F8L GT !FACEPLATED! 2002 Mustang GT 7.84 @ 86.01 Join Date: Jul 2008 Location: Upper Michigan Posts: 12,917 iTrader: 13 reviews	Thats good they gave you a refund. Im running the same setup in my car and never had a problem. My guess is a bad filter __________________ MM Bracket Racing Crew Co-Founder ~Its a Drag Car, Not a Show Car~ LINK-->Custom Race Transmission Build<--LINK

March 3rd, 2011, 01:19 AM	#11
BaznastyDave MM Fanatic 2004 Mustang Join Date: May 2010 Location: NC Posts: 4,336 iTrader: 4 reviews	I have heard of this problem in a LS1 using a Fram filter before, stuff happens i guess. __________________ 305/333 WHP/WTQ with CMS Stage II cams 440/552 WHP/WTQ on Spray 7.86 @ 89.1mph, 1.61 60 foot N/A 7.20 @ 98.8MPH 1.55 60 foot on spray Stock Longblock with Cams

March 2nd, 2011, 08:55 PM	#4
Evil Klown Regular 2002 Mustang GT Join Date: Dec 2007 Location: Idaho Posts: 134 iTrader: 0 reviews	either the new filter isnt the right one (just because u buy it new doesnt mean its not bad) or two orings are installed on the new filter...check the filter

March 3rd, 2011, 02:01 AM	#12
Dutch 09 Regular 2009 Mustang V6 Vert Join Date: Jun 2010 Location: Michigan Posts: 123 iTrader: 0 reviews	LMAO........5 GALLONS? of WHAT WHERE? __________________ Tru-Fiber SH/GT, Steeda CAI, 3.73s, Pypes Cat-back True Duals, 18" Boss 304s, 2010 "MY COLOR" illuminated sill plates, SCT/F3 tuner, GT front end, CDC chin spoiler, Quik-Latch hood pins

March 3rd, 2011, 10:04 AM	#14
Loki Enthusiast 1996 V6 Join Date: Feb 2011 Location: Connecticut Posts: 632 iTrader: 0 reviews	I'm having a problem with my care after changing oil, too. Also used a Mobil1 filter....But I also used fi cleaner and engine cleaner, so....I doubt its related. Just won't start for shit when its cold, have to floor the gas and let it sputter rpms until it finally forces through. I'm thinking the cleaners clogged something up with gunk old oil. Not on a Mustang, though, so completely unrelated here. Didn't mean to hijack. Lol

March 4th, 2011, 07:56 AM	#15
Eagle2000GT I Post Entirely Way Too Much 2000 Mustang GT 12.73@111.36 Join Date: Aug 2007 Location: Shelbyville, IN Posts: 5,311 iTrader: 1 reviews	Update: I went out to start the car last night and no oil pressure again. It has to be coincidence and unrelated to changing the oil. __________________ ProCharger P-1SC, 9 psi, STD 396/383; Uncorrected 388/375; SAE 383/370 Mods list in Garage.

March 4th, 2011, 08:11 AM	#16
Perfectcircle Enthusiast 2001 GT Join Date: Jun 2010 Location: connecticut Posts: 611 iTrader: 0 reviews	I don't know about these motors but the oil pressure sending gauge on my jeep is right next to the oil filter, if this is the case in our mustang motors then it is likely you wacked it by accident, have a loose connection etc. Are you running a separate oil pressure gauge or just going by what the one on the dash says? The stocker isn't much to pay mind to. __________________ Rollin on 335 Steamrollers.

March 4th, 2011, 11:00 AM	#17
gt_andy Regular 2000 Mustang GT 13.10@103 Join Date: Oct 2007 Location: Toledo, OH Posts: 309 iTrader: 0 reviews	I have a 2000GT also doing the same thing. I can start it up and it has pressure and then drops. The car sounds and seems to run just fine with no knock or any issues... After I rev it up a little or it warms up it appears to get full pressure. Im assuming it is a sensor... or the oil pump is starting to go out.. Please help me.. i will be pulling this thing out soon. __________________ 2000 Ford Mustang GT 5spd (TOY) 1997 Ford Tunderbird LX = Daily Driver Last edited by gt_andy; March 4th, 2011 at 11:05 AM.

March 4th, 2011, 11:23 AM	#18
Eagle2000GT I Post Entirely Way Too Much 2000 Mustang GT 12.73@111.36 Join Date: Aug 2007 Location: Shelbyville, IN Posts: 5,311 iTrader: 1 reviews	Update: After two trips to the parts store I've got oil pressure again. Evidently Ford made a mid-year change. My 2000 GT has a 2001 Oil Pressure Switch. I guess I gave Mobile 1 a bad rep when it wasn't necessary. I wonder what the odds are of the switch going out during an oil change? Perfectcircle: Yes, the switch is located next to the oil filter and is easy to change. And, you are correct about the stock gauge. It doesn't really measure oil pressure. Its basically an idiot light with a needle. Above 6 psi it will read the middle of the gauge. Below 6 psi it reads zero. gt andy: It is most likely your switch. It costs $40 at Ford and $9 at Autozone. __________________ ProCharger P-1SC, 9 psi, STD 396/383; Uncorrected 388/375; SAE 383/370 Mods list in Garage.

March 4th, 2011, 12:23 PM	#19
KV007 Hardcore Enthusiast 2003 Mustang Gt Slow Join Date: Jul 2009 Location: redding,california Posts: 2,532 Blog Entries: 2 iTrader: 2 reviews	yes 5 quarts haha sorry __________________ 409rwhp at 4500 rpms.Vortech V1 Intercooled,kurgan motorsports powerpipe, 3.12 pulley, all Mac Exhaust,Sct Tuner,Bolt Ons,Cobra Brakes,MM cc plates,Vis 2000 cobra r hood,MGW shifter,Strange 31 Spline axles,Eaton Possi

March 4th, 2011, 12:30 PM	#20
0949er MM Fanatic 2004 Mustang GT 12.85 @ 114 Join Date: Apr 2010 Location: Charlotte Posts: 3,225 iTrader: 0 reviews	I dunno about you guys but when ever I pull my filter off even if im trying to be careful I still get oil all over that sensor. Bound to make it go out eventually. __________________ MODS: Vortech V1 T-Trim @ 7.5 PSI (tuned down) Comp Cam Stage 2's + more 432 rwhp / 396 rwtq 02/27/2011 NEW VIDEOS! It takes ~$60 a rwhp (over stock) for a 99-04 Mustang GT. Do the Math C2H5OH on the horizon

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