What the deuce is this thing?

Spook50 · 05-11-08, 06:47 PM

Over at Tonkota's place last week, we were trying to figure out what this brass looking thing on the back of the 3FE intake manifold is. There's normally a plastic gray cap that snaps on over the top of it. On his, the screw in the middle was missing completely, and on mine, it had come completely out (but was kept from being lost by the gray cap). I reinstalled the screw (which has a little black O-ring on it) and snugged it down, and it seems to have increased not only my mileage, but I noticed a decent seat-of-the-pants improvement in power. Felt like there was a noticeable increase in low end torque.

My question is, WTF is it?

AATLAS1X · 05-11-08, 06:53 PM

I want to say Fuel pressure regulator, but ......Drivers side at end of fuel rail?

Shane

Spook50 · 05-11-08, 06:56 PM

Quote:

Originally Posted by AATLAS1X

I want to say Fuel pressure regulator, but ......Drivers side at end of fuel rail?

Shane

IIRC the FPR is at the forward end of the fuel rail. I guess it's possible this could have some involvement in it though...

Edit: SOR shows it as a dampener at the "inlet" of the fuel rail. Possibly helping to subdue surges in fuel pressure that the regulator might not be able to keep up with. I could see where that might help with mileage, but with power too? I wasn't even expecting any difference when I reinstalled the screw, but I definitely felt something.

Spook50 · 05-12-08, 10:48 PM

Update: Replacing and snugging down that screw definitely made a large improvement in my gas mileage. On average I would get 10-11 MPG if I took I-90 across Washington (Spokane to Seattle and back). This time, even with the extra 475lbs of a slant six sitting in the back of the truck, I got 14.8 MPG.

Considering I was cruising along at 75-77 MPH and had almost 500 LBs of extra weight, I'd say that's a hell of an improvement.

I'm curious to see what it'll get the next time I go across via HWY 2 (which is where I got my all-time best of 17 MPG, probably due to staying between 60-65 the whole way).

So long story short, if you've got a 62 or an FJ80, check for that screw!

billmc · 05-13-08, 06:14 AM

fuel pulsation damper

tonkota · 05-13-08, 09:05 AM

I think I have one in my basement. I'll have to fix that now.

Spook50 · 05-13-08, 09:13 AM

Quote:

Originally Posted by tonkota

I think I have one in my basement. I'll have to fix that now.

Be sure to lemme know if you see a difference in mileage on yours too. I guess that little screw kinda was important, huh?

OlympiaFJ60 · 05-13-08, 10:56 AM

Thanks Spook, one more thing to check out when looking these rigs over.

Landpimp · 05-13-08, 10:58 AM

where abouts is it? I cant quite pin it down

Spook50 · 05-13-08, 11:06 AM

Quote:

Originally Posted by Landpimp

where abouts is it? I cant quite pin it down

Look at your fuel rail, and it's at the aft end of it. It'll most likely have a gray cap snapped over the top of it. Work the cap off by hand and you'll uncover it. Careful though. If yours is like mine, the screw will very likely have worked its way out and can easily get lost.

Landpimp · 05-13-08, 11:08 AM

ah yes.....that thingy......I think I poped the cap off once for some reason....better take a gander at it

Quote:

Originally Posted by Spook50

Look at your fuel rail, and it's at the aft end of it. It'll most likely have a gray cap snapped over the top of it. Work the cap off by hand and you'll uncover it. Careful though. If yours is like mine, the screw will very likely have worked its way out and can easily get lost.

Aseif007 · 05-13-08, 11:48 AM

Quote:

Originally Posted by billmc

fuel pulsation damper

X2, FPD.

takeitforgranite · 05-13-08, 12:17 PM

Something tells me this thread is a candidate for FAQ.

cruiser88 · 05-13-08, 01:23 PM

Yep it is your damper and that blasted thing is known to leak

.

It is reguired to remove the airbox if you need to tighten that thing down. BIG BLASTED METRIC WRENCH.

tonkota · 05-13-08, 01:57 PM

Quote:

Originally Posted by Spook50

Be sure to lemme know if you see a difference in mileage on yours too. I guess that little screw kinda was important, huh?

I'll check the mileage, but I won't be able to tell you if it was that little screw or if it was the camshaft that I just put in. I also won't be able to confirm a power increase (from the little screw anyway).

I was getting 13 no matter what I tried though.

Spook50 · 05-13-08, 02:01 PM

Quote:

Originally Posted by cruiser88

Yep it is your damper and that blasted thing is known to leak

.

It is reguired to remove the airbox if you need to tighten that thing down. BIG BLASTED METRIC WRENCH.

Are we talking about the same part? I can see where it'd be prone to leak, but looking at it, I wouldn't think I'd need to remove my airbox or intake hose at all.

Not that I want to try. The thing looks like a bitch to get to either way...

cruiser88 · 05-13-08, 02:09 PM

Quote:

Originally Posted by Spook50

Are we talking about the same part? I can see where it'd be prone to leak, but looking at it, I wouldn't think I'd need to remove my airbox or intake hose at all.

Not that I want to try. The thing looks like a bitch to get to either way...

There may be a sst tool or something to remove it...i fawked around for over a hour to tighten that thing down with a wrench with no success.

In all honesty you can have the air box off and on within the hour if you are de-smogged.

YODA 88 62 · 05-13-08, 02:34 PM

It started leaking on mine about 6 years ago and is currently leaking. I used the smallest cresent wrench i could buy and managed to get it off without removing the intake. I think i paid around fourty bucks for the damper.

cruiser88 · 05-13-08, 02:36 PM

Quote:

Originally Posted by YODA 88 62

It started leaking on mine about 6 years ago and is currently leaking. I used the smallest cresent wrench i could buy and managed to get it off without removing the intake. I think i paid around fourty bucks for the damper.

how. of course i have the biggest hands on the planet so that does not help

YODA 88 62 · 05-14-08, 10:19 AM

It looks like i bent the heat shield out of the way. That gave just enough to get the crescent wrench in.

IB14A69 · 05-14-08, 10:30 AM

Very interesting

I will have to check this out, if my 62 gets any quicker I wont be missing my sti

sbisig · 05-24-08, 03:36 PM

I made the adjustment on my 92 FJ80. It needed a few turns with the screwdriver to tighten it down.

After driving it around home, it seemed to have better low end torque. The true test will be when I head over Snoqualmie Pass (hopefully tomorrow). I have a good baseline from traveling there last week (13.4 mpg gallon from Federal Way to Ellensburg, WA).

Steve

Spook50 · 05-24-08, 08:45 PM

Quote:

Originally Posted by sbisig

I made the adjustment on my 92 FJ80. It needed a few turns with the screwdriver to tighten it down.

After driving it around home, it seemed to have better low end torque. The true test will be when I head over Snoqualmie Pass (hopefully tomorrow). I have a good baseline from traveling there last week (13.4 mpg gallon from Federal Way to Ellensburg, WA).

Steve

I just checked mine again last night while I was gassing up, just for shits and giggles (and to distract myself from the assrape being counted up on the pump) and it was coming out again. So I snugged it down again and noticed the same improvement in power. I figure it's worth checking every time you gas up, just to make sure it's still good to go.

I can't wait to drive across HWY2 and see what kind of economy I get out of it.

GAS-A-LOT! · 05-24-08, 09:01 PM

where exactly? got a zoomed out pic?

sbisig · 05-24-08, 09:22 PM

Quote:

Originally Posted by GAS-A-LOT!

where exactly? got a zoomed out pic?

Look straight down over your engine, all the way to the rear, you'll see the plastic cap (or if lost, see the picture in the first post).

You can pop it off with your fingers.

Steve

05-11-08, 06:47 PM	#1
Spook50 I'll poop in ur cookwear Join Date: Feb 2005 Location: Spokane, WA Posts: 1,357 Blog Entries: 1	What the deuce is this thing? Over at Tonkota's place last week, we were trying to figure out what this brass looking thing on the back of the 3FE intake manifold is. There's normally a plastic gray cap that snaps on over the top of it. On his, the screw in the middle was missing completely, and on mine, it had come completely out (but was kept from being lost by the gray cap). I reinstalled the screw (which has a little black O-ring on it) and snugged it down, and it seems to have increased not only my mileage, but I noticed a decent seat-of-the-pants improvement in power. Felt like there was a noticeable increase in low end torque. My question is, WTF is it? __________________ '88 FJ62 W/ 235K miles, desmogged, stock SUA W/ full length Add-A-Leafs, Tuffy console, TaskLED domelight, Mallory ignition, and four wheel discs Good? Bad? I'm the guy with the gun.

05-11-08, 06:53 PM	#2
AATLAS1X IH8MUD Lifer Join Date: Jan 2006 Location: Under the covered wagon Posts: 2,880	I want to say Fuel pressure regulator, but ......Drivers side at end of fuel rail? Shane __________________ ---> Heater restoration kits 1974-84 40 series ---> Heater restoration kits 1967-74 40 series ---> Replacement leather for 60 series ---> Replacement leather for 80 series ---> eBay Store - Decals, Heater kits and bits

05-12-08, 10:48 PM	#4
Spook50 I'll poop in ur cookwear Join Date: Feb 2005 Location: Spokane, WA Posts: 1,357 Blog Entries: 1	Update: Replacing and snugging down that screw definitely made a large improvement in my gas mileage. On average I would get 10-11 MPG if I took I-90 across Washington (Spokane to Seattle and back). This time, even with the extra 475lbs of a slant six sitting in the back of the truck, I got 14.8 MPG. Considering I was cruising along at 75-77 MPH and had almost 500 LBs of extra weight, I'd say that's a hell of an improvement. I'm curious to see what it'll get the next time I go across via HWY 2 (which is where I got my all-time best of 17 MPG, probably due to staying between 60-65 the whole way). So long story short, if you've got a 62 or an FJ80, check for that screw! __________________ '88 FJ62 W/ 235K miles, desmogged, stock SUA W/ full length Add-A-Leafs, Tuffy console, TaskLED domelight, Mallory ignition, and four wheel discs Good? Bad? I'm the guy with the gun.

05-13-08, 06:14 AM	#5
billmc IH8MUD Regular Join Date: Apr 2003 Posts: 334	fuel pulsation damper __________________ '82 FJ40, '88 FJ62, '71 Karman Ghia Vert, '73 Alfa Romeo 2000 GTV

05-13-08, 09:05 AM	#6
tonkota IH8MUD Lifer Join Date: Sep 2004 Location: Spokane, WA TLCA# 14154 Posts: 1,214 Blog Entries: 4	I think I have one in my basement. I'll have to fix that now. __________________ A Ron Using one cruiser to go mountain biking, and the other to collect dust. 2F-E Article McNamara gear writeup

05-13-08, 10:56 AM	#8
OlympiaFJ60 IH8MUD Addict Join Date: Apr 2002 Location: Olympia, WA Posts: 692	Thanks Spook, one more thing to check out when looking these rigs over. __________________ '87 FJ60 2FTBI, '73 FJ40, '72 FJ55, '66 FJ40, M416A1 www.olympiafj60.net www.eastolympiacruisers.com

05-13-08, 10:58 AM	#9
Landpimp IH8MUD Lifer Join Date: Mar 2003 Location: Gig Harbor WA TLCA# 5506 Posts: 11,255	where abouts is it? I cant quite pin it down

05-13-08, 12:17 PM	#13
takeitforgranite IH8MUD Regular Join Date: May 2007 Location: Reno, NV Posts: 444	Something tells me this thread is a candidate for FAQ. __________________ _____________________________________________ Yeah, I look like a grandpa driving it, but I still pull chicks. 84 FJ60 - 2F, 301k miles, 4.5" Alcans, 12" Bilstein 5150s, 35x12.5 XTerrains, Blazenoffroad.com winch bumper, magnaflow, rust, and an oil leak!

05-13-08, 01:23 PM	#14
cruiser88 They call me crazy88 Join Date: Feb 2006 Location: over here TLCA# 17319 Posts: 6,638	Yep it is your damper and that blasted thing is known to leak. It is reguired to remove the airbox if you need to tighten that thing down. BIG BLASTED METRIC WRENCH. __________________ Girls you need to join this club http://www.playhardgetdirty.com/index.html "how 'bout we sing 'kyles mom is a bitch' in E minor?"by OregonCruzer http://s237.photobucket.com/albums/f...13957_15_0.jpg http://s237.photobucket.com/albums/f...113957_1_2.jpg

05-13-08, 02:34 PM	#18
YODA 88 62 IH8MUD Regular Join Date: Sep 2005 Location: austin/nacogdoches,tx Posts: 235	It started leaking on mine about 6 years ago and is currently leaking. I used the smallest cresent wrench i could buy and managed to get it off without removing the intake. I think i paid around fourty bucks for the damper. __________________ 1988 FJ 62- SOA, Aussies front and rear, 30-spline Longs, 4.88s, 36x13.5 Iroks, Marlin hysteer

05-14-08, 10:19 AM	#20
YODA 88 62 IH8MUD Regular Join Date: Sep 2005 Location: austin/nacogdoches,tx Posts: 235	It looks like i bent the heat shield out of the way. That gave just enough to get the crescent wrench in. __________________ 1988 FJ 62- SOA, Aussies front and rear, 30-spline Longs, 4.88s, 36x13.5 Iroks, Marlin hysteer

05-14-08, 10:30 AM	#21
IB14A69 IH8MUD Regular Join Date: Aug 2006 Location: Olympia Wa Posts: 404	Very interesting I will have to check this out, if my 62 gets any quicker I wont be missing my sti __________________ 59 GMC Fleetside 65 FJ45 Lwb 69 Bronco 69 Charger 71 Chevelle 74 FJ55 76 F-250 lifted 77 F-150 lifted 78 FJ40 lifted 81 FJ40 82 Ram 4x4 89 FJ62 93 FZJ80 96 F-350 Powerstroke 97 FZJ80 40th Anniv 05 WRX STI sold

05-24-08, 03:36 PM	#22
sbisig IH8MUD Rookie Join Date: Apr 2006 Location: Puyallup, WA TLCA# 16740 Posts: 15	I made the adjustment on my 92 FJ80. It needed a few turns with the screwdriver to tighten it down. After driving it around home, it seemed to have better low end torque. The true test will be when I head over Snoqualmie Pass (hopefully tomorrow). I have a good baseline from traveling there last week (13.4 mpg gallon from Federal Way to Ellensburg, WA). Steve __________________ 1992 Toyota FJ80 Land Cruiser, OME 850/863, Pin7 CDL, ARB Bull Bar, ARB Touring Rack, Storage Box, Dual Batteries, Winch, FJ Cruiser Wheels, 285/70R-17 BFG M/Ts Pacific Northwest Backroad Adventures - Pacific Northwest Overland Adventure Blog and Forum.

05-24-08, 09:01 PM	#24
GAS-A-LOT! IH8MUD Addict Join Date: Oct 2006 Location: LOS ANGELES Posts: 625	where exactly? got a zoomed out pic? __________________ HELO?....is this thing on? 1991 fj80 's but I drive it, suspension air bags, roof rack, trailer 8pin connection, 7 pin mod, hood spacers & stolen radio. 1985 fj60 (DD)HID-xenon retrofit projectors, tailgate storage, rear seat shoulder belts, 62 rear sway bar, & roof rack. 1987 4runner, seat bracket spacers(4crawler.com), driver side battery, HID-xenon retrofit projectors, & modified/upgraded intake, rancho shocks. WWW.RONSERRANO.COM