oil pressure at. idle

1989Gt. · November 28th, 2011, 09:39 PM

So today after 50 miles of driving my new engine I'm rolling up yo a light and I notice my pressure guage is low so I rev and it shoots to normal, now its been doing this all day.

Been fine up untill now I'm worried

Side note. The car wants to die at stop lights too could I be idling to low?

This is only ay idle so it scares me

iPAPKE · November 28th, 2011, 09:41 PM

Does it do it when you stop, could ave low oil

1989Gt. · November 28th, 2011, 10:02 PM

Yea when I'm sitting still

would that be a symptom

OptionalStang · November 29th, 2011, 10:13 AM

well my 1st guess would be your oil pump...does your Tbody have a throttle screw you can adjust?

Tang Stang · November 29th, 2011, 10:19 AM

What rpm are you idling at, and what oil pressure are you seeing at idle?

Originally Posted by OptionalStang

...does your Tbody have a throttle screw you can adjust?

Do not attempt to adjust idle rpm by messing with that screw.

OptionalStang · November 29th, 2011, 01:02 PM

Originally Posted by Tang Stang

What rpm are you idling at, and what oil pressure are you seeing at idle?

Do not attempt to adjust idle rpm by messing with that screw.

i never have but i did on my old honda..doesnt the screw just set the tps abit to run up or decrease the rpms based on the posistion on the tps? or open or close the throttlebody blade to allow or decrease airflow to adjust the idle?

Tang Stang · November 29th, 2011, 01:15 PM

The TPS "latches" when you first turn the key to "ON", so no. However, it needs to still be within range. Just remember that idle speed is adjusted in the EEC, not by the throttle body stop screw.

1989Gt. · November 29th, 2011, 01:15 PM

Originally Posted by Tang Stang

What rpm are you idling at, and what oil pressure are you seeing at idle?

Do not attempt to adjust idle rpm by messing with that screw.

This is hard to answer because when its running normal its usually 700 or so. But like i said when im coming to a stop it surges a bit then turns off. But anywhere between 500-900 on surging. Just sits at low.

Tang Stang · November 29th, 2011, 01:36 PM

Originally Posted by 1989Gt.

This is hard to answer because when its running normal its usually 700 or so. But like i said when im coming to a stop it surges a bit then turns off. But anywhere between 500-900 on surging. Just sits at low.

When it's idling steady at 700 rpm, what is the oil pressure? If by "sits at low", you mean you're using the factory gauge, then it's time to get a real oil pressure gauge. The factory gauge is just a 7psi on/off switch.

Also, what oil viscosity are you using? This is on your 4V swapped car, right? Have you tuned the car for whatever you've done to it?

1989Gt. · November 29th, 2011, 02:15 PM

Ok so i went out this morning checked the oil it was a little low, so i put about 3/4ths a quart in Turned it on, When the car warmed up went and pulled the iac valve it wanted to die so i know thats good,

Then i checked the voltage at the battery with the car running it was around 13v. So im pretty sure that was good.

Then i let the car idle warm and my freaking tach isnt working i got one of those tachs you have to tap the guage face and this time it wouldnt freaking move (cold maybe?!)

So i couldnt tell what she was idleing at but it was flickering between nor"ma"l and low oil pressure so before the " "normal.

1989Gt. · November 29th, 2011, 02:17 PM

Originally Posted by Tang Stang

When it's idling steady at 700 rpm, what is the oil pressure? If by "sits at low", you mean you're using the factory gauge, then it's time to get a real oil pressure gauge. The factory gauge is just a 7psi on/off switch.

Also, what oil viscosity are you using? This is on your 4V swapped car, right? Have you tuned the car for whatever you've done to it?

Checked ford tsb and it said for initial start up use 5w-20 So i went with that.

I have not tuned the car yet no. But everything and i mean everything in the bottom end is new, not used Brand new.

Havent had an issue for the first 50 miles ive been driving it till yesterday its not making any funny noises either. But i think your right i need to get a oil pressure guage or check it manually, its just making me mad my stupid tach already doesnt work either i hate ford tachs.

Tang Stang · November 29th, 2011, 02:24 PM

The surging idle is likely due to the tune, especially if you're running the stock tune with larger injectors/different MAF.

Definitely install a real oil pressure gauge, even if just temporarily. You're not receiving any useful information whatsoever from the factory gauge.

1989Gt. · November 29th, 2011, 02:26 PM

Yeah i know it sucks ok im gonna hook it up to a manual pressure reader for the time being,

And i didnt change injectors or maf so i doubt thats the problem

Tang Stang · November 29th, 2011, 02:41 PM

Are you running your stock 2V injectors and MAF then? Or the ones that came on the 4V?

1989Gt. · November 29th, 2011, 02:43 PM

The ones that came with my 2v. Im not 100% sure im making over 280whp IT honestly runs fine. When i get on it. I did pop a lean code bank 2 when i first started it but i turned it off and it hasnt came back up yet so im just waiting.

1989Gt. · November 29th, 2011, 02:55 PM

Is a mechanical or electrical aftermarket gauge better?

Tang Stang · November 29th, 2011, 03:00 PM

I prefer electrical as it's a cleaner install as opposed to routing the capillary tubing for a mechanical, but that is entirely your choice.

1989Gt. · November 29th, 2011, 03:08 PM

will a sunpro one suffice? for awhile till i can get a autometer?

1989Gt. · November 29th, 2011, 03:22 PM

http://www.youtube.com/user/xtreme34.../1/lp6CFXTfw1E

1989Gt. · November 29th, 2011, 03:24 PM

MOV00010 - YouTube

November 28th, 2011, 09:39 PM	#1
1989Gt. Hardcore Enthusiast 1989 Mustang GT Join Date: Apr 2008 Posts: 2,799 iTrader: 0 reviews	oil pressure at. idle So today after 50 miles of driving my new engine I'm rolling up yo a light and I notice my pressure guage is low so I rev and it shoots to normal, now its been doing this all day. Been fine up untill now I'm worried Side note. The car wants to die at stop lights too could I be idling to low? This is only ay idle so it scares me __________________ MM FOBRA CLUB MEMBER #1

November 28th, 2011, 10:02 PM	#3
1989Gt. Hardcore Enthusiast 1989 Mustang GT Join Date: Apr 2008 Posts: 2,799 iTrader: 0 reviews	Yea when I'm sitting still would that be a symptom __________________ MM FOBRA CLUB MEMBER #1

November 29th, 2011, 01:15 PM	#7
Tang Stang Hardcore Enthusiast 2004 Mustang GT Join Date: Sep 2010 Location: Imperial, MO Posts: 1,961 iTrader: 2 reviews	The TPS "latches" when you first turn the key to "ON", so no. However, it needs to still be within range. Just remember that idle speed is adjusted in the EEC, not by the throttle body stop screw. __________________ Rod @ AzzKicker Cars 2004 Ford Mustang GT-The Driver-BBK CAI, PP TB & Inlet, Steeda UD's, SLP LM1, & 3.73's. 1990 Mercury Cougar XR7-The Meth Addict-5.0L DOHC Stroker w/2.1L KB SC. 1995 Ford F150-Mud Toy-5.0L, 4x4, 33's, & Warn 8274 Winch

November 29th, 2011, 02:15 PM	#10
1989Gt. Hardcore Enthusiast 1989 Mustang GT Join Date: Apr 2008 Posts: 2,799 iTrader: 0 reviews	Ok so i went out this morning checked the oil it was a little low, so i put about 3/4ths a quart in Turned it on, When the car warmed up went and pulled the iac valve it wanted to die so i know thats good, Then i checked the voltage at the battery with the car running it was around 13v. So im pretty sure that was good. Then i let the car idle warm and my freaking tach isnt working i got one of those tachs you have to tap the guage face and this time it wouldnt freaking move (cold maybe?!) So i couldnt tell what she was idleing at but it was flickering between nor"ma"l and low oil pressure so before the " "normal. __________________ MM FOBRA CLUB MEMBER #1

November 29th, 2011, 02:24 PM	#12
Tang Stang Hardcore Enthusiast 2004 Mustang GT Join Date: Sep 2010 Location: Imperial, MO Posts: 1,961 iTrader: 2 reviews	The surging idle is likely due to the tune, especially if you're running the stock tune with larger injectors/different MAF. Definitely install a real oil pressure gauge, even if just temporarily. You're not receiving any useful information whatsoever from the factory gauge. __________________ Rod @ AzzKicker Cars 2004 Ford Mustang GT-The Driver-BBK CAI, PP TB & Inlet, Steeda UD's, SLP LM1, & 3.73's. 1990 Mercury Cougar XR7-The Meth Addict-5.0L DOHC Stroker w/2.1L KB SC. 1995 Ford F150-Mud Toy-5.0L, 4x4, 33's, & Warn 8274 Winch

November 28th, 2011, 09:41 PM	#2
iPAPKE iPoopke Regular 2004 Mustang Join Date: Aug 2011 Location: Michigan Posts: 835 iTrader: 0 reviews	Does it do it when you stop, could ave low oil

November 29th, 2011, 10:13 AM	#4
OptionalStang Banned 1997 cougar 4.6 1/2PI TooFast4theFUZZ Join Date: May 2011 Location: se wi Posts: 991 iTrader: 1 reviews	well my 1st guess would be your oil pump...does your Tbody have a throttle screw you can adjust?

November 29th, 2011, 02:26 PM	#13
1989Gt. Hardcore Enthusiast 1989 Mustang GT Join Date: Apr 2008 Posts: 2,799 iTrader: 0 reviews	Yeah i know it sucks ok im gonna hook it up to a manual pressure reader for the time being, And i didnt change injectors or maf so i doubt thats the problem __________________ MM FOBRA CLUB MEMBER #1

November 29th, 2011, 02:41 PM	#14
Tang Stang Hardcore Enthusiast 2004 Mustang GT Join Date: Sep 2010 Location: Imperial, MO Posts: 1,961 iTrader: 2 reviews	Are you running your stock 2V injectors and MAF then? Or the ones that came on the 4V? __________________ Rod @ AzzKicker Cars 2004 Ford Mustang GT-The Driver-BBK CAI, PP TB & Inlet, Steeda UD's, SLP LM1, & 3.73's. 1990 Mercury Cougar XR7-The Meth Addict-5.0L DOHC Stroker w/2.1L KB SC. 1995 Ford F150-Mud Toy-5.0L, 4x4, 33's, & Warn 8274 Winch

November 29th, 2011, 02:43 PM	#15
1989Gt. Hardcore Enthusiast 1989 Mustang GT Join Date: Apr 2008 Posts: 2,799 iTrader: 0 reviews	The ones that came with my 2v. Im not 100% sure im making over 280whp IT honestly runs fine. When i get on it. I did pop a lean code bank 2 when i first started it but i turned it off and it hasnt came back up yet so im just waiting. __________________ MM FOBRA CLUB MEMBER #1

November 29th, 2011, 02:55 PM	#16
1989Gt. Hardcore Enthusiast 1989 Mustang GT Join Date: Apr 2008 Posts: 2,799 iTrader: 0 reviews	Is a mechanical or electrical aftermarket gauge better? __________________ MM FOBRA CLUB MEMBER #1

November 29th, 2011, 03:00 PM	#17
Tang Stang Hardcore Enthusiast 2004 Mustang GT Join Date: Sep 2010 Location: Imperial, MO Posts: 1,961 iTrader: 2 reviews	I prefer electrical as it's a cleaner install as opposed to routing the capillary tubing for a mechanical, but that is entirely your choice. __________________ Rod @ AzzKicker Cars 2004 Ford Mustang GT-The Driver-BBK CAI, PP TB & Inlet, Steeda UD's, SLP LM1, & 3.73's. 1990 Mercury Cougar XR7-The Meth Addict-5.0L DOHC Stroker w/2.1L KB SC. 1995 Ford F150-Mud Toy-5.0L, 4x4, 33's, & Warn 8274 Winch

November 29th, 2011, 03:08 PM	#18
1989Gt. Hardcore Enthusiast 1989 Mustang GT Join Date: Apr 2008 Posts: 2,799 iTrader: 0 reviews	will a sunpro one suffice? for awhile till i can get a autometer? __________________ MM FOBRA CLUB MEMBER #1

November 29th, 2011, 03:22 PM	#19
1989Gt. Hardcore Enthusiast 1989 Mustang GT Join Date: Apr 2008 Posts: 2,799 iTrader: 0 reviews	http://www.youtube.com/user/xtreme34.../1/lp6CFXTfw1E __________________ MM FOBRA CLUB MEMBER #1

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