67-69 Firebird TECH Includes 69 TA.

          
Reply
 
Thread Tools Display Modes
  #1  
Old 02-08-2015, 07:12 PM
GregL's Avatar
GregL GregL is offline
Senior Chief
 
Join Date: Aug 2010
Location: Palm Springs, CA.
Posts: 256
Default Full Throttle Travel?

Hi Guys,
Having a little problem with my throttle travel. Stock linkage with cable, original 7028265 Rochester carb. Pedal to floor only opens secondaries about 2/3 of the way. If I remove cable at carb I can easily open throttle to full position. Stock (new) cable has no adjustments and if I start bending things the idle will be too high.
Your thoughts?
Greg
Attached Thumbnails
Click image for larger version

Name:	DSCN3427.jpg
Views:	120
Size:	79.0 KB
ID:	389718  

  #2  
Old 02-08-2015, 08:21 PM
frankyboy455 frankyboy455 is offline
Ultimate Warrior
 
Join Date: May 2004
Location: Vermont/Canada border
Posts: 1,240
Default

Could it be the "sleeve" on the cable touching the "collar" when you're approaching full throttle ? Maybe you could take a look while someone's in the car pushing the pedal ? This looks like an aftermarket cable, is it ?


Last edited by frankyboy455; 02-08-2015 at 08:29 PM.
  #3  
Old 02-08-2015, 08:57 PM
GregL's Avatar
GregL GregL is offline
Senior Chief
 
Join Date: Aug 2010
Location: Palm Springs, CA.
Posts: 256
Default

Cable is correct for the car. Moves freely and does not hit or bind at the collar. I think I may need to bend the lower part of the pedal assembly upward.

  #4  
Old 02-08-2015, 09:52 PM
TedRamAirII TedRamAirII is offline
Ultimate Warrior
 
Join Date: May 2014
Location: Ocala, Florida
Posts: 2,778
Default

If it will go WOT with cable connected at carb, when you pull it all the way back by hand, then yes you may have the lower gas pedal rod bent. Make sure to adjust it when the pedal hits the floor, you are at WOT. You dont want the carb to hit WOT and have a gap between the pedal and the floor, that's how linkages get bent or cables broken.


Last edited by TedRamAirII; 02-08-2015 at 09:57 PM.
  #5  
Old 02-09-2015, 12:19 AM
Dick Boneske's Avatar
Dick Boneske Dick Boneske is offline
Ultimate Warrior
 
Join Date: Mar 2004
Location: Winneconne, Wisconsin
Posts: 5,503
Default

Good advice TedRamAirII. Too many guys make the mistake of having the carb wide open with the pedal or linkage not fully bottomed. Broken parts follow--especially the throttle cable and carb throttle arm.

__________________
BONESTOCK GOATS

'64 GTO Tripower Hardtop (Wife's Car)
'64 GTO Tripower Post Coupe (My Car)
'99 Bonneville SE Sedan
  #6  
Old 02-09-2015, 09:57 AM
ANDYA ANDYA is offline
Chief Ponti-yacker
 
Join Date: Nov 2005
Location: BROOKLYN, NY
Posts: 950
Default

Also check to see that you don't have too much padding and carpet under the gas pedal as this will prevent the pedal from going all the way down.

  #7  
Old 02-09-2015, 10:00 AM
rohrt rohrt is offline
Ultimate Warrior
 
Join Date: May 2004
Location: Cedar Rapids, IA
Posts: 4,196
Default

I had to remove my pedal and bend it into shape to get WOT. Hardest part is getting that darn C-clip off.

  #8  
Old 02-09-2015, 11:34 AM
68azbird 68azbird is offline
Chief Ponti-yacker
 
Join Date: Mar 2014
Location: AZ
Posts: 739
Default

7 out of 9 of the first Gen birds I worked on needed pedal modifications to obtain full throttle. On one I used bronze bushings at the pivot. Helped take away a lot of slop associated with the plastic one.

  #9  
Old 02-24-2015, 01:58 PM
GregL's Avatar
GregL GregL is offline
Senior Chief
 
Join Date: Aug 2010
Location: Palm Springs, CA.
Posts: 256
Default

Re-bent the lower gas pedal rod, works fine now. Thanks guys.

  #10  
Old 02-24-2015, 04:20 PM
silverbullet07 silverbullet07 is offline
Ultimate Warrior
 
Join Date: Mar 2013
Location: Roanoke VA
Posts: 1,105
Default

The end of the throttle cable that connect to the gas pedal, I place a small lead fishing slip sinker on it to take up a little slop and that worked to open my throttle all the way open.

  #11  
Old 03-26-2015, 06:17 PM
thefirebirdm@n's Avatar
thefirebirdm@n thefirebirdm@n is offline
Ultimate Warrior
 
Join Date: Feb 2004
Location: San Antonio, Tx
Posts: 1,098
Send a message via MSN to thefirebirdm@n
Default

Hmmm I may have this problem too. I've tested WOT by having the wife sit in the car and press the pedal to the floor but always seems like when I reach in I can still turn the throttle back just a little bit more. I put an aftermarket adjustable cable (another long story) on it and have adjusted it 3 or 4 times. Pedal has always felt a little sloppy too. May have to take it out, replace bushings and see if it needs to be bent.

Is the pedal arm repro'd? The one in my car looks weird, not sure if its just the way the factory made them this way or not but at first glance looks like a piece at the end was remove but looking close also looks like it may have just come that way.

I'll post a pic later.

__________________
Jimmy
www.firebirdgallery.com
2002 WS6 M6 Trans Am - original owner
1973 Trans Am 455/4-speed
1971 Formula 400/400
1969 GTO 400/400 - 3rd owner
1968 Firebird Convertible 350/200R4

POCI - AAC
  #12  
Old 03-27-2015, 01:28 AM
rexs73gto rexs73gto is offline
Suspended
 
Join Date: Apr 2011
Location: Niles MI.
Posts: 4,319
Default

All the 1st gen birds were made so the carb didn't open all the way up on purpose. Thats why the bird had a HP rating of 335 HP & the GO had a 366 HP rating. Pontiac had a 10 HP rat per lbs rule & they did that so the bird didn't have the bigger HP because of the lesser weight of the bird. All it took was to bend the throttle bracket a bit to correct it & then the bird would have the 366 HP rating because the carb would then open all the way up. But it was done on purpose.

Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 04:54 PM.

 

About Us

The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.

 




Copyright © 2017