TPI Tuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.
Sponsored by:
Sponsored by:

FFS, what could I have done installing my runners and plenum?

Thread Tools
 
Search this Thread
 
Old Sep 11, 2014 | 06:16 PM
  #1  
8Mike9's Avatar
Thread Starter
Supreme Member
 
Joined: Jul 1999
Posts: 5,183
Likes: 42
From: Oakdale, Ca
Car: 89 IrocZ
Engine: L98-ish
Transmission: 700R4
FFS, what could I have done installing my runners and plenum?

So, last weekend, installed new injectors...and a bout with my FP gauge, cycled the pressure several times, all holding and no leaks at all.

Got my gaskets in today, bolted the runners and plenum in...went to fire off the car (good thing battery was low and didn't have enough juise to spin it over) and heard a hissing sound.

Went to get the charger, came back and smelled fuel.

Yep...intake manifold on the left side, had puddles of fuel in it.

Had my daughter cycle the key, sure enough #7 injectors spraying fuel out from the top under the fuel rail.

So, it held pressure and didn't leak a drop, until I bolted up everything else...ya, will figure it out later tonight, or in the morning, but looking for "been there, had it happen to me too" replies...sure an Oring can't go to hell from sitting for a few days, so that would lead me to a damaged injector, but how?

Open to all thoughts, comments and yes..."ya dumb chit, this is what you did" comments/replies.

Grrr, getting too old for this stuff
Reply
Old Sep 11, 2014 | 08:55 PM
  #2  
earlpote's Avatar
Junior Member
 
Joined: Aug 2014
Posts: 53
Likes: 0
Re: FFS, what could I have done installing my runners and plenum?

i doubt it would cause that big of a leak... but did you lubricate the o-rings before you pushed em into the manifold?
Reply
Old Sep 12, 2014 | 12:05 AM
  #3  
Linson's Avatar
COTM Editor (Retired)
 
Joined: Aug 2009
Posts: 1,884
Likes: 83
From: Washington
Car: 89 Formula 350, TTA
Re: FFS, what could I have done installing my runners and plenum?

Did you have to loosen any of the four fuel rail bolts in order to install the runners, and then maybe forgot to re-tighten them?
Reply
Old Sep 12, 2014 | 12:14 AM
  #4  
Fred SS's Avatar
Senior Member
15 Year Member
iTrader: (4)
 
Joined: Apr 2010
Posts: 513
Likes: 43
From: New Jersey
Car: 87 Monte Carlo SS
Engine: 89 350TPI Transplant
Transmission: 2004r
Axle/Gears: 3.73
Re: FFS, what could I have done installing my runners and plenum?

Which injectors did you use, stock or Bosch 3's? Stock injectors are installed into the fuel rail first then the assembly is installed into the manifold. When I bought my Bosch 3's from South Bay, if my memory serves me correctly, their instructions were clear that you must install the injectors into the manifold first then install the fuel rail.
Reply
Old Sep 12, 2014 | 07:49 AM
  #5  
hrspwr's Avatar
Member
iTrader: (3)
 
Joined: Jul 2009
Posts: 409
Likes: 0
From: Ontario, Canada
Car: 86 IROC
Engine: 350 Vortec TPI
Transmission: 700R4
Axle/Gears: BW 3.27
Re: FFS, what could I have done installing my runners and plenum?

If it leaks from the top between the fuel rail and the injector, make sure that you locked the injector in place and the oring is not cut. Try to spin the injector back and forth to help seat the oring in the rail before you take anything out.
I doubt this, but did the old oring stay inside the rail before you put the new injector in?
Reply
Old Sep 12, 2014 | 09:35 AM
  #6  
8Mike9's Avatar
Thread Starter
Supreme Member
 
Joined: Jul 1999
Posts: 5,183
Likes: 42
From: Oakdale, Ca
Car: 89 IrocZ
Engine: L98-ish
Transmission: 700R4
Re: FFS, what could I have done installing my runners and plenum?

The orings were lubed prior to install, put them in the intake first (SB's Bosch 3's).
Dididn't have to loosen any thing to get the runners in place

No orings left in the rails, didn't think of spinning it before pulling the runners again last night-doh..

But what has me scratching my head is they held fine a few days ago when I tested them, (waiting for my gaskets to come in), only difference is putting the runners/etc on yesterday.

Didn't pull the rail yet, was getting too late, will try spinning the leaking one see if it helps.

Saving grace is it was a good thing the battery needed a charge, otherwise you guys would probably be posting links of my burned down garage and car
Reply
Old Sep 12, 2014 | 09:37 AM
  #7  
rusty vango's Avatar
Supreme Member
 
Joined: Jun 2011
Posts: 2,036
Likes: 5
From: knoxville tn
Car: 86 IROC
Engine: 5.0 TPI
Transmission: 700-R-4
Axle/Gears: 2.73 open
Re: FFS, what could I have done installing my runners and plenum?

Originally Posted by 8Mike9
So, last weekend, installed new injectors...and a bout with my FP gauge, cycled the pressure several times, all holding and no leaks at all.

Got my gaskets in today, bolted the runners and plenum in...went to fire off the car (good thing battery was low and didn't have enough juise to spin it over) and heard a hissing sound.

Went to get the charger, came back and smelled fuel.

Yep...intake manifold on the left side, had puddles of fuel in it.

Had my daughter cycle the key, sure enough #7 injectors spraying fuel out from the top under the fuel rail.

So, it held pressure and didn't leak a drop, until I bolted up everything else...ya, will figure it out later tonight, or in the morning, but looking for "been there, had it happen to me too" replies...sure an Oring can't go to hell from sitting for a few days, so that would lead me to a damaged injector, but how?

Open to all thoughts, comments and yes..."ya dumb chit, this is what you did" comments/replies.

Grrr, getting too old for this stuff
hey! I resemble that remark. this is what we get for not dying young! and it does make me wonder how many members are 50+. maybe have to take a poll. and good luck with your injectors.
Reply
Old Sep 12, 2014 | 09:51 AM
  #8  
8Mike9's Avatar
Thread Starter
Supreme Member
 
Joined: Jul 1999
Posts: 5,183
Likes: 42
From: Oakdale, Ca
Car: 89 IrocZ
Engine: L98-ish
Transmission: 700R4
Re: FFS, what could I have done installing my runners and plenum?

Lol, building up the energy to head out back...need a few more cups of coffee, and let the Geritol kick in...
Reply
Old Sep 12, 2014 | 10:06 AM
  #9  
Bob88GTA's Avatar
Supreme Member
20 Year Member
iTrader: (2)
 
Joined: Apr 2000
Posts: 3,938
Likes: 99
From: Huntsville AL
Car: 88GTA
Engine: 5.7TPI
Transmission: Auto
Axle/Gears: 3.27
Re: FFS, what could I have done installing my runners and plenum?

Originally Posted by rusty vango
hey! I resemble that remark. this is what we get for not dying young! and it does make me wonder how many members are 50+. maybe have to take a poll. and good luck with your injectors.
You first Rusty...start the poll!
A young 52 here!
Reply
Old Sep 12, 2014 | 10:19 AM
  #10  
8Mike9's Avatar
Thread Starter
Supreme Member
 
Joined: Jul 1999
Posts: 5,183
Likes: 42
From: Oakdale, Ca
Car: 89 IrocZ
Engine: L98-ish
Transmission: 700R4
Re: FFS, what could I have done installing my runners and plenum?

After yesterday, an aging 52 here
Reply
Old Sep 12, 2014 | 10:23 AM
  #11  
camarofvr's Avatar
Junior Member
 
Joined: Sep 2012
Posts: 35
Likes: 0
Car: 87 Camaro Z28
Engine: TPI 350 bored .030 over
Transmission: 700R4
Re: FFS, what could I have done installing my runners and plenum?

Yeah I've nicked a few orings tinkering with different injectors. It's very easy to do if you don't pay close attention and never try to force them. I try twisting gently on each injector as I'm pushing down the fuel rail. They'll usually just slide easily into place that way.
Reply
Old Sep 12, 2014 | 11:11 AM
  #12  
8Mike9's Avatar
Thread Starter
Supreme Member
 
Joined: Jul 1999
Posts: 5,183
Likes: 42
From: Oakdale, Ca
Car: 89 IrocZ
Engine: L98-ish
Transmission: 700R4
Re: FFS, what could I have done installing my runners and plenum?

Originally Posted by camarofvr
Yeah I've nicked a few orings tinkering with different injectors. It's very easy to do if you don't pay close attention and never try to force them. I try twisting gently on each injector as I'm pushing down the fuel rail. They'll usually just slide easily into place that way.
Yep, trashed the Oring...musta just had enough left on it to not leak a few days back...well, good thing my gaskets weren't in yet, hate to think of what would have happened if I had it all together and it started leaking running down the road later on.
Reply
Old Sep 12, 2014 | 11:26 AM
  #13  
Bob88GTA's Avatar
Supreme Member
20 Year Member
iTrader: (2)
 
Joined: Apr 2000
Posts: 3,938
Likes: 99
From: Huntsville AL
Car: 88GTA
Engine: 5.7TPI
Transmission: Auto
Axle/Gears: 3.27
Re: FFS, what could I have done installing my runners and plenum?

FFS, what could I have done installing my runners and plenum?-boom.jpg



Well, not that bad!
Reply
Old Sep 12, 2014 | 11:29 AM
  #14  
rusty vango's Avatar
Supreme Member
 
Joined: Jun 2011
Posts: 2,036
Likes: 5
From: knoxville tn
Car: 86 IROC
Engine: 5.0 TPI
Transmission: 700-R-4
Axle/Gears: 2.73 open
Re: FFS, what could I have done installing my runners and plenum?

Originally Posted by 8Mike9
After yesterday, an aging 52 here
im 54 . a true fossil.
Reply
Old Sep 12, 2014 | 11:31 AM
  #15  
rusty vango's Avatar
Supreme Member
 
Joined: Jun 2011
Posts: 2,036
Likes: 5
From: knoxville tn
Car: 86 IROC
Engine: 5.0 TPI
Transmission: 700-R-4
Axle/Gears: 2.73 open
Re: FFS, what could I have done installing my runners and plenum?

Originally Posted by 8Mike9
Lol, building up the energy to head out back...need a few more cups of coffee, and let the Geritol kick in...
I use guiness extra stout and jameson for motivation .sure makes life interesting!!
Reply
Old Sep 12, 2014 | 11:36 AM
  #16  
Bob88GTA's Avatar
Supreme Member
20 Year Member
iTrader: (2)
 
Joined: Apr 2000
Posts: 3,938
Likes: 99
From: Huntsville AL
Car: 88GTA
Engine: 5.7TPI
Transmission: Auto
Axle/Gears: 3.27
Re: FFS, what could I have done installing my runners and plenum?

Originally Posted by rusty vango
I use guiness extra stout and jameson for motivation .sure makes life interesting!!
Reply
Old Sep 12, 2014 | 02:18 PM
  #17  
red rock's Avatar
Supreme Member
iTrader: (2)
 
Joined: Sep 2009
Posts: 1,591
Likes: 5
From: WI.
Car: 1987 iroc
Engine: 383 TPIS intake, Dyno Don headers
Transmission: 700R4 w/Pro-built Auto/transgo 2-3
Axle/Gears: 3.27/3.70 borg warner 9 bolt
Re: FFS, what could I have done installing my runners and plenum?

I'm 55, maybe we should start a old guys thread. Lol Seems like maybe we have forgotten more than we remember. I had removed my fuel rails once and thought i had them tightened only to find out while the car was running that i forgot to tighten them. I had fuel spraying everywhere. lesson learned.
Reply
Old Sep 12, 2014 | 02:38 PM
  #18  
rusty vango's Avatar
Supreme Member
 
Joined: Jun 2011
Posts: 2,036
Likes: 5
From: knoxville tn
Car: 86 IROC
Engine: 5.0 TPI
Transmission: 700-R-4
Axle/Gears: 2.73 open
Re: FFS, what could I have done installing my runners and plenum?

Originally Posted by red rock
I'm 55, maybe we should start a old guys thread. Lol Seems like maybe we have forgotten more than we remember. I had removed my fuel rails once and thought i had them tightened only to find out while the car was running that i forgot to tighten them. I had fuel spraying everywhere. lesson learned.
what to call it?? how bout "geezers R us." or "we know, we just cant remember". or "you just got beat by grandpa". personally I take great satisfaction in being asked ,"how do YOU know that??!!". sometimes ,if I feel like it , ill tell em.
Reply
Old Sep 12, 2014 | 02:46 PM
  #19  
Bob88GTA's Avatar
Supreme Member
20 Year Member
iTrader: (2)
 
Joined: Apr 2000
Posts: 3,938
Likes: 99
From: Huntsville AL
Car: 88GTA
Engine: 5.7TPI
Transmission: Auto
Axle/Gears: 3.27
Re: FFS, what could I have done installing my runners and plenum?

Originally Posted by red rock
I'm 55, maybe we should start a old guys thread. Lol Seems like maybe we have forgotten more than we remember. I had removed my fuel rails once and thought i had them tightened only to find out while the car was running that i forgot to tighten them. I had fuel spraying everywhere. lesson learned.
Case in point: Got my chip back from Brian @Tuned, grabbed the wife and fired up the car with the hood up....purred like a kitten.......till I reved it up to check it out........all of a sudden spray and steam EVERYWHERE! I thought I blew it up!
Nope, Just forgot to tighten that clamp on the heater hose that she asked about 5 minutes earlier!
Reply
Old Sep 12, 2014 | 03:08 PM
  #20  
8Mike9's Avatar
Thread Starter
Supreme Member
 
Joined: Jul 1999
Posts: 5,183
Likes: 42
From: Oakdale, Ca
Car: 89 IrocZ
Engine: L98-ish
Transmission: 700R4
Re: FFS, what could I have done installing my runners and plenum?

I use the "CRS" syndrome, can't remember shlitz

Well, she's alive and kicking now.
That's the first time in 3 or 4 years since it ran, need to put the muffler on, weld the tips up, then save up for some tires...only a few thousand miles on them, but 15 years old and dry rotting.

Might call the Ex over before swapping tires, see if she wants to do any high speed runs for old times sake
Reply
Old Sep 12, 2014 | 03:13 PM
  #21  
Bob88GTA's Avatar
Supreme Member
20 Year Member
iTrader: (2)
 
Joined: Apr 2000
Posts: 3,938
Likes: 99
From: Huntsville AL
Car: 88GTA
Engine: 5.7TPI
Transmission: Auto
Axle/Gears: 3.27
Re: FFS, what could I have done installing my runners and plenum?

Originally Posted by 8Mike9
I use the "CRS" syndrome, can't remember shlitz

Well, she's alive and kicking now.
That's the first time in 3 or 4 years since it ran, need to put the muffler on, weld the tips up, then save up for some tires...only a few thousand miles on them, but 15 years old and dry rotting.

Might call the Ex over before swapping tires, see if she wants to do any high speed runs for old times sake
Don't do that Mike...........Glad you got it running!
Reply
Old Sep 12, 2014 | 03:18 PM
  #22  
8Mike9's Avatar
Thread Starter
Supreme Member
 
Joined: Jul 1999
Posts: 5,183
Likes: 42
From: Oakdale, Ca
Car: 89 IrocZ
Engine: L98-ish
Transmission: 700R4
Re: FFS, what could I have done installing my runners and plenum?

Originally Posted by Bob88GTA
Don't do that Mike...........Glad you got it running!
You're right Bob, hate to see the car get damaged lol!

Thanks!
Reply
Old Sep 12, 2014 | 04:58 PM
  #23  
red rock's Avatar
Supreme Member
iTrader: (2)
 
Joined: Sep 2009
Posts: 1,591
Likes: 5
From: WI.
Car: 1987 iroc
Engine: 383 TPIS intake, Dyno Don headers
Transmission: 700R4 w/Pro-built Auto/transgo 2-3
Axle/Gears: 3.27/3.70 borg warner 9 bolt
Re: FFS, what could I have done installing my runners and plenum?

Thats what we need is some humor once in a while. Glad you got it running.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
MantyZ28
Engine/Drivetrain/Suspension Parts for Sale
16
Dec 21, 2015 11:02 AM
Hawkeye1980
TPI
15
Aug 31, 2015 07:09 AM
ASE doc
Alternative Port EFI Intakes
5
Aug 25, 2015 09:14 AM
mdtoren
TPI
12
Aug 23, 2015 12:52 PM
mdtoren
Tech / General Engine
0
Aug 16, 2015 05:45 PM




All times are GMT -5. The time now is 07:30 AM.