Fuel Pressure Guage

MATT02GT · June 4th, 2007, 04:54 PM

Couldnt get any help in the electrical section so I thought Id try here...
Has anyone ever used an electric fuel presure guage. I recently put an Autometer one in my car and the thing is all over the place. The needle jumps when it shouldnt, and sometimes it seems to get stuck and read high psi when it shouldnt. The stuff is brand new. The only thing I could think that may be doing this is the sensor is mounted on the fuel rail, so maybe vibration?? Anyone else ever have this type of problem??

GTsetGO · June 4th, 2007, 05:03 PM

can't say that i have brah. mine seems to work fine (or what seems to be normal for me)

beheivjer · June 4th, 2007, 05:14 PM

if its vibrating on the rail you would be leaking fuel. mine is on the rail witha tee adaptor so i can still use the schrader valve and have no problems. a wacky gauge is usually a bad ground.

banned · June 4th, 2007, 06:03 PM

thats why I went with all mechanicals - its a little more PITA - but more reliablely accurate

GTsetGO · June 4th, 2007, 06:08 PM

Yeah, I have heard that mechanical are more reliable, but I mounted all of mine inside the compartment area and had to use electrical. it sucks cause they cost more

ChrisJ · June 4th, 2007, 07:22 PM

Yep mechanical is great and cheaper but to run them inside your car you want to run electrical...

Thats how mine sits at idle and you can see it jump as I rev it...

Can you post a video of what yours is doing?

MATT02GT · June 12th, 2007, 09:33 PM

Finally got a video of the guage to post. Wouldnt the psi raise with the rpm? Does this look normal for an electric fuel psi guage?
http://s113.photobucket.com/albums/n...t=guagevid.flv

White99stang · June 12th, 2007, 10:00 PM

dude its not a boost gauge, all you need is the fuel pressure to stay at 40psi. If it were to raise it would only be by a couple of psi. It doesn't matter if you are going 2k rpms or 6krpms as long as the gauge doesn't go below 20 or so psi you are good. All the gauge is for is to make sure when you are under boost you don't loose fuel pressure cause that will lead to detonation.

MATT02GT · June 12th, 2007, 10:11 PM

Seems like a $300 piece of shit to me. I think its goin on ebay and getting replaced with an A/F guage

White99stang · June 12th, 2007, 10:16 PM

you are gonna be just as pissed with an a/f gauge, you think the needle is funny on the f/p gauge wait till you see the a/f gauge. It will be all over the place. Keep the fuel pressure gauge it is a great safety feature. I mean thats all gauges are meant for is to monitor your car not look cool and the needle doing cool things with the rpms. I think a a/f gauge from autometer is a big piece of shit. If you are gonna go with a a/f gauge get a LM-1 wideband sensor so you can actually hook it up to a laptop and get a/f reading all the time. But i would seriously keep the fuel pressure gauge. Cause you will never know when a fuel pump fails and you are low a fuel pressure and then boom

ChrisJ · June 13th, 2007, 10:45 AM

Originally Posted by MATT02GT

Finally got a video of the guage to post. Wouldnt the psi raise with the rpm? Does this look normal for an electric fuel psi guage?
http://s113.photobucket.com/albums/n...t=guagevid.flv

Fuel pressure does not look bad in that video...Looks fine...

Keep the gauge...Watch the video in my post...

My wideband at idle runs 14.6 - 15.2...Just buy a good wideband...

Listen to what White99stang says...He speaks the troof...

BTW my Wideband is a Innovative XD-16 (gauge) and LC-1 (wiodeband controller)...I highly recommend them...

MATT02GT · June 13th, 2007, 11:33 AM

The guage has also got stuck like a 50-60 psi a few times, that ever happen to anyone?

ChrisJ · June 13th, 2007, 01:08 PM

Never had it stick on me...I would call autometer and ask them what this could be...They can prolly tell you if it could be the gauge messing up...Or it could be an issue with your sending unit...They could help you out on all that...

June 4th, 2007, 04:54 PM	#1
MATT02GT The Mean Green Join Date: May 2007 Location: Colo. Springs, CO Posts: 4,164 iTrader: 1 reviews	Fuel Pressure Guage Couldnt get any help in the electrical section so I thought Id try here... Has anyone ever used an electric fuel presure guage. I recently put an Autometer one in my car and the thing is all over the place. The needle jumps when it shouldnt, and sometimes it seems to get stuck and read high psi when it shouldnt. The stuff is brand new. The only thing I could think that may be doing this is the sensor is mounted on the fuel rail, so maybe vibration?? Anyone else ever have this type of problem?? __________________ Its not how fast you drive, but how you drive fast. 2002 Mustang GT... Just The Usual Bolt-Ons Bolt on list in Garage..

June 4th, 2007, 05:03 PM	#2
GTsetGO Cigar Assassin 2004 Mustang GT 12.88 @ 112 Join Date: Aug 2005 Location: A Galaxy Far, Far Away Posts: 14,083 iTrader: 10 reviews	can't say that i have brah. mine seems to work fine (or what seems to be normal for me) __________________ Cigar Samplers for Sale 2008 Acura TL-S - 2008 Honda Pilot EX-SE - 2008 Cain F Big Bear Paradox

June 4th, 2007, 05:14 PM	#3
beheivjer Enthusiast Join Date: Feb 2006 Location: belding, michigan Posts: 840 iTrader: 0 reviews	if its vibrating on the rail you would be leaking fuel. mine is on the rail witha tee adaptor so i can still use the schrader valve and have no problems. a wacky gauge is usually a bad ground. __________________ 1969 Early Bronco 3.5" lift 37" swampers 1969 Early Bronco 2" lift half cab 1979 2.3t Cobra 1997 Black Cobra http://www.cardomain.com/ride/680999 http://www.myspace.com/beheivjer

June 4th, 2007, 06:03 PM	#4
banned Regular Join Date: May 2007 Posts: 461 iTrader: 0 reviews	thats why I went with all mechanicals - its a little more PITA - but more reliablely accurate __________________ Considering selling my car to fund my race car: take a look and tell me what you think. http://www.moddedmustangs.com/forums...ml#post1041280

June 4th, 2007, 06:08 PM	#5
GTsetGO Cigar Assassin 2004 Mustang GT 12.88 @ 112 Join Date: Aug 2005 Location: A Galaxy Far, Far Away Posts: 14,083 iTrader: 10 reviews	Yeah, I have heard that mechanical are more reliable, but I mounted all of mine inside the compartment area and had to use electrical. it sucks cause they cost more __________________ Cigar Samplers for Sale 2008 Acura TL-S - 2008 Honda Pilot EX-SE - 2008 Cain F Big Bear Paradox

June 4th, 2007, 07:22 PM	#6
ChrisJ RLY SRS Join Date: Aug 2005 Location: Ft. Meade, MD Posts: 38,220 Blog Entries: 4 iTrader: 10 reviews	Yep mechanical is great and cheaper but to run them inside your car you want to run electrical... Thats how mine sits at idle and you can see it jump as I rev it... Can you post a video of what yours is doing? __________________ 2008 Acura TL Type-S - 2008 EB Ford Expedition - 2002 Boosted GT - Sold Facebook Google+

June 12th, 2007, 09:33 PM	#7
MATT02GT The Mean Green Join Date: May 2007 Location: Colo. Springs, CO Posts: 4,164 iTrader: 1 reviews	Finally got a video of the guage to post. Wouldnt the psi raise with the rpm? Does this look normal for an electric fuel psi guage? http://s113.photobucket.com/albums/n...t=guagevid.flv __________________ Its not how fast you drive, but how you drive fast. 2002 Mustang GT... Just The Usual Bolt-Ons Bolt on list in Garage..

June 12th, 2007, 10:00 PM	#8
White99stang MM's nicest mod, :) Join Date: Aug 2005 Location: Apex, NC Posts: 3,771 iTrader: 0 reviews	dude its not a boost gauge, all you need is the fuel pressure to stay at 40psi. If it were to raise it would only be by a couple of psi. It doesn't matter if you are going 2k rpms or 6krpms as long as the gauge doesn't go below 20 or so psi you are good. All the gauge is for is to make sure when you are under boost you don't loose fuel pressure cause that will lead to detonation. __________________ 06 Dodge MegaCab Diesel 455rwhp/815rwtq REAL TRUCKS DON'T USE SPARK PLUGS

June 12th, 2007, 10:11 PM	#9
MATT02GT The Mean Green Join Date: May 2007 Location: Colo. Springs, CO Posts: 4,164 iTrader: 1 reviews	Seems like a $300 piece of shit to me. I think its goin on ebay and getting replaced with an A/F guage __________________ Its not how fast you drive, but how you drive fast. 2002 Mustang GT... Just The Usual Bolt-Ons Bolt on list in Garage..

June 12th, 2007, 10:16 PM	#10
White99stang MM's nicest mod, :) Join Date: Aug 2005 Location: Apex, NC Posts: 3,771 iTrader: 0 reviews	you are gonna be just as pissed with an a/f gauge, you think the needle is funny on the f/p gauge wait till you see the a/f gauge. It will be all over the place. Keep the fuel pressure gauge it is a great safety feature. I mean thats all gauges are meant for is to monitor your car not look cool and the needle doing cool things with the rpms. I think a a/f gauge from autometer is a big piece of shit. If you are gonna go with a a/f gauge get a LM-1 wideband sensor so you can actually hook it up to a laptop and get a/f reading all the time. But i would seriously keep the fuel pressure gauge. Cause you will never know when a fuel pump fails and you are low a fuel pressure and then boom __________________ 06 Dodge MegaCab Diesel 455rwhp/815rwtq REAL TRUCKS DON'T USE SPARK PLUGS

June 13th, 2007, 11:33 AM	#12
MATT02GT The Mean Green Join Date: May 2007 Location: Colo. Springs, CO Posts: 4,164 iTrader: 1 reviews	The guage has also got stuck like a 50-60 psi a few times, that ever happen to anyone? __________________ Its not how fast you drive, but how you drive fast. 2002 Mustang GT... Just The Usual Bolt-Ons Bolt on list in Garage..

June 13th, 2007, 01:08 PM	#13
ChrisJ RLY SRS Join Date: Aug 2005 Location: Ft. Meade, MD Posts: 38,220 Blog Entries: 4 iTrader: 10 reviews	Never had it stick on me...I would call autometer and ask them what this could be...They can prolly tell you if it could be the gauge messing up...Or it could be an issue with your sending unit...They could help you out on all that... __________________ 2008 Acura TL Type-S - 2008 EB Ford Expedition - 2002 Boosted GT - Sold Facebook Google+

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