Yesterday I had the TBI off because I was making a spacer and I put it on. However, when I drove it afterward it idled at over 2000. I thought that I must have stretched the cables. I didn't. There is play in the cables. Here the spring that returns the throttle to the regular position is weak and will not return it all of the way. I had a big problem with the fuel lines matching up and I do NOT want to take the TBI off AGAIN. (this makes time 4.)If I need a new spring, do I need to take the whole TBI off? If so it is going to a shop. I am tired of fooling with it. I would appreciate any input you guys can give me. Thanks.

Eric

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Teal 1991 Camaro R.S., T-Tops,
Leather, Re-worked 700r4 also w/kit,
MSD ignition, MSD 8.5 mm. superconductor wires,
MSD Coil, ADS superchip, Open element air cleaner,
K-n-N filter, Gutted cat, Flowmaster cat-back system,
Edelbrock TES headers, March 3piece billet underdrive pulleys
3.73 gears
http://www.geocities.com/gitarz2/camaro.html
I was shocked to see that companies sold a taillight
set for a rustang! Since when do they have taillights????

 

You can change the spring without taking the TBI off. If you want to change just the passenger side spring (which might do enough for you) all you do is take off the TPS and unscrew the tab on the throttle shaft. The spring will slide right off. If you want to change the driver's side too you have to unscrew the throttle blades from the shaft(without letting them fall in the manifold - magnets help)and slide the shaft out.

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88 firebird formula
350 Vortec TBI
214int/224exh, .471int/.491exh
Edelbrock headers
SIX-speed
Eats LS1's with a 2.73 open rear and 2 1/4 stock catback

My Formula

 

it sounds to me like you have a vacuum leak if anything

its easy to know if the cables are causing the problem just disconnect the throttle cable and start it and see where it idles at

 

mine idles high in the morning. At around 1500. why? It takes a while to calm down.

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-Tas
'89 Formula WS-6
[soon to be Performace Red =) ]

305, TBI, auto, 14x3 chrome flat based open element with K&N, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips....

Super GRK_Taz World
EFI & Intake Options
AOL IM: superGRtaz
ICQ 82881207

 

Pablo,
Thanks for the reply but I am sure that it is the spring. With the hood open I had my buddy hit the gas and you can see the bores open up properly and when he lets off it idles high. I can then pull on the cable mechanism and it goes back into position. I disconnected the cables (not running of course) and you can move the throttle on the TBI like it is a piece of paper. When I let go it does not come back. I have to physicly move it back. Where can I get one of those springs? Advanced auto or do I have to go to a junk yard? Thanks guys.
Eric

 

Tas,
That's just your fast idle that stays on till the temp comes up.

Zac Spalding

 

if that is the case why dont you just add a spring to the throttle arm like carb guys? then put the spring down to a bolt on the manifold

thats alot easier