PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

fast 90 install question (sticky TB)

Thread Tools
 
Search this Thread
 
Old Oct 8, 2006 | 02:48 PM
  #1  
99WS7's Avatar
Thread Starter
TECH Resident
iTrader: (13)
 
Joined: Oct 2005
Posts: 894
Likes: 0
From: WY
Default fast 90 install question (sticky TB)

Got the 90/90 on and she fired right up. Let it idle for a bit and all seemed good. Reved up in nuetral and did fine but when you go for a ride the throttle will stick between 2200ish to 3kish but a quick tap on the gas pedal to rev it up and it will drop back down to idle. Cleaned the mass air and TB very good and it still is doing it. Could I have a vac problem. Maybe not enough spring tension? Seems to have a good amount. Any ideas...
Reply
Old Oct 8, 2006 | 03:00 PM
  #2  
oange ss's Avatar
TECH Junkie
20 Year Member
iTrader: (50)
 
Joined: Jan 2005
Posts: 3,241
Likes: 6
From: Texas
Default

sounds like a typical FAST t-body, throw it away and buy a Nick Williams t-body
Reply
Old Oct 8, 2006 | 03:03 PM
  #3  
99WS7's Avatar
Thread Starter
TECH Resident
iTrader: (13)
 
Joined: Oct 2005
Posts: 894
Likes: 0
From: WY
Default

SOB....my buddie and I were just discussing that. What the hell is the big difference of the NW TB. I got a real good deal on my whole set up so Im not that pisses but damn. So no other thoughts. They make a good intake but a shitty TB.
Reply
Old Oct 8, 2006 | 03:06 PM
  #4  
oange ss's Avatar
TECH Junkie
20 Year Member
iTrader: (50)
 
Joined: Jan 2005
Posts: 3,241
Likes: 6
From: Texas
Default

NW = work of art.......i have heard of people tryin to fix the FAST ones with no success, but i guess you could try
Reply
Old Oct 8, 2006 | 03:55 PM
  #5  
99WS7's Avatar
Thread Starter
TECH Resident
iTrader: (13)
 
Joined: Oct 2005
Posts: 894
Likes: 0
From: WY
Default

we did the GSM (GAY SPRING MOD) got a spring going from the crusie contorl pin ummm....to the plastic next to the lid. Looks retarteded but it does work...lol. I'll get a pic later.
Reply
Old Oct 8, 2006 | 03:57 PM
  #6  
ZL1Killa's Avatar
TECH Resident
iTrader: (17)
 
Joined: Sep 2004
Posts: 3,747
Likes: 0
From: NC - Charlotte area
Default

yep. get a nick williams. he is doing some more work too, so stick with him. might want to wait a while and see what he is releasing
Reply
Old Oct 8, 2006 | 04:38 PM
  #7  
Phoenix 5.7's Avatar
TECH Junkie
iTrader: (7)
 
Joined: Aug 2004
Posts: 3,809
Likes: 0
From: Prairie de Femme, LA
Default

i have a FAST 90 TB, and i will say it is a huge pile of ****. im gettin a holley or NW as soon as i can. im goin to try the spring mod for a temp fix, but its pathetic that its that crappy
Reply
Old Oct 8, 2006 | 04:44 PM
  #8  
foff667's Avatar
LS1TECH Sponsor
iTrader: (2)
 
Joined: Jul 2003
Posts: 7,986
Likes: 3
From: Clermont, FL
Default

i had some major issues trying to tune a car recently with a BBK TB....not only could you not set the set screw low enough, when you did set it to its lowest point the TB would stick & you'd need to give it 30% tp just to get it to unstick...horrible for around town driving.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

 Pouria Savadkouei
story-1

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

 Verdad Gallardo
story-2

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-3

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-4

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-5

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-6

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-7

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-8

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-9

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
Old Oct 8, 2006 | 07:12 PM
  #9  
gametech's Avatar
TECH Veteran
20 Year Member
Active Streak: 30 Days
Active Streak: 60 Days
Top Answer: 1
iTrader: (1)
 
Joined: Sep 2004
Posts: 4,915
Likes: 908
From: Stockbridge GA
Default

Even the ugly spring mod didn't help my fast 90. I gave up and went NW. I just wish the fast was heavier, so I could use it for a boat anchor.
Reply
Old Oct 8, 2006 | 11:45 PM
  #10  
GreaseMonkey83's Avatar
On The Tree
iTrader: (5)
 
Joined: Aug 2005
Posts: 105
Likes: 1
From: Marblehead, OH
Default

sumbitch! so thats why my throttle hangs around 2100-2200 when i stop. i always thought it was in my tune.... i guess it is my TB. damn fast 90's. how are you guys doing the spring thing, any pics??
Reply
Old Oct 9, 2006 | 05:54 AM
  #11  
TuneMaster's Avatar
Teching In
 
Joined: Apr 2006
Posts: 2
Likes: 0
From: Melbourne, Australia
Default

Got the same problem here. Tuned a customer's vehicle and noticed the throttle body sticking at approx 2500 rpm. Had to fit a return spring from the bottom accelerator cable hole to the front stud for the pcv retainer. All better but going to swap for a Holley.
Reply
Old Oct 9, 2006 | 02:56 PM
  #12  
99WS7's Avatar
Thread Starter
TECH Resident
iTrader: (13)
 
Joined: Oct 2005
Posts: 894
Likes: 0
From: WY
Default

for being so damn expensive thats bs that they are a pile of ****. I got a good deal on a lid, mass, tb and the intake but if I would have know about the fast 90 TB was such a pos I would have just got the NW to begin with. O-well you live and learn.
Reply
Old Oct 9, 2006 | 03:00 PM
  #13  
monicaz28's Avatar
TECH Fanatic
iTrader: (5)
 
Joined: Oct 2004
Posts: 1,173
Likes: 0
From: DFW
Default

Yep, FAST tb's suck. I tried to tell my b/f not to get the FAST, go with the NW... but he was in too big of a hurry and did it anyways. The outcome was predictable.
Reply
Old Oct 16, 2006 | 04:49 PM
  #14  
My90Iroc's Avatar
TECH Enthusiast
iTrader: (26)
 
Joined: Mar 2004
Posts: 589
Likes: 0
From: Long Island
Default

Contact Fast, I think they were/are offering replacement springs to help with this issue.
Reply
Old Oct 17, 2006 | 01:39 PM
  #15  
gametech's Avatar
TECH Veteran
20 Year Member
Active Streak: 30 Days
Active Streak: 60 Days
Top Answer: 1
iTrader: (1)
 
Joined: Sep 2004
Posts: 4,915
Likes: 908
From: Stockbridge GA
Default

The spring is not the issue. The problem is excessive throttle shaft play, which will also leak vacuum/boost. A heavier spring just bandaids the pos.
Reply




All times are GMT -5. The time now is 11:58 PM.

story-0
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-1
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-2
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-3
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-4
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-5
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-6
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-7
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-8
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-9
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE