Are 1990 Throttle Bodies the same as 1991

[TSIkw]

As the topic says...i'm trying to find out if the throttle body from a '90 Talon TSi AWD is the same as the '91.

I'm guessing they are but since there are so many other differences from '90 to '91 i'd like to make sure.

 

[blkwidow]

it depends on what year of a 1990 that you have.

http://www.roadraceengineering.com/2gtbswap.htm

this should tell you all you need to know.

 

[1990talon]

Yes they are the same.

As the topic says...i'm trying to find out if the throttle body from a '90 Talon TSi AWD is the same as the '91.

I'm guessing they are but since there are so many other differences from '90 to '91 i'd like to make sure.

So many diiferances from 90-91?

 

[1990talon]

I used a 91 on my 90 tsi

 

[95TalonOwner]

it depends on what year of a 1990 that you have.

http://www.roadraceengineering.com/2gtbswap.htm

this should tell you all you need to know.

???????????? 1990 is only one year, I don't know what you are talking about.

The 1990 throttle body is NOT the same as a 91-94. and the 95-99 is not the same as a 90, or 91-94.

 

[blkwidow]

i meant that if you have a throttle body from a car thats after june, 1990.

 

[95TalonOwner]

Production dates aside, what I said is true.

 

[TSIkw]

Not sure which one it is. Its off a friends parts car so i'll have to ask him.

Thanks for the link blkwidow.

 

[95TalonOwner]

90's have two vacuum ports on the top and 2 on the side.

91-94's have all four vacuum ports on the top. That is one way to figure out which one it is.

 

[Auto RS T]

This is an early 90 Throttle body. Notice the TPS and the vacuum line differences from a later model throttle body.

http://www.dsmtuners.com/gallery/showimage.php?i=25571&catid=searchresults&searchid=15125

This is a later model throttle body. Notice all 4 vacuum lines on top. In this picture they are capped off.

http://www.dsmtuners.com/gallery/showimage.php?i=27619&catid=searchresults&searchid=15128

 

[blkwidow]

jeez no need to get all crazy. i was just stating what i read from the link before. sheesh.

 

[fourreGsixty3]

Also on 90 TBs the TPS plugs into a female connector on the firewall.

Dustin

 

[TSIkw]

So do you know if all '90's have the two vac lines or is right that the later 1990 models had the 4 lines. I don't have the tb in front of me. Friend has it in his garage somewhere and he can't remember what it looks like.

Thanks for the help.

 

[fourreGsixty3]

After June 1990 the TBs have 4 vaccum ports on the top, like it shows in the bottom link that Jim (Auto_RS T) provided. Before June of 90 they have 2 vaccum ports on top, and 2 on the side where the TPS for 91-94s is.

Dustin

 

[TSIkw]

Ok...all clear now.

Thanks again

 

[FORMONTOYA]

Plus the throttle body shaft seals are different between the 90 and the rest. The 90 has 2 different size seals, the rest have the same size shaft seals.

For those that plan on a re-seal job while it's out.

 

[Auto RS T]

I agree about replacing the seals before installation.

Really, the 90 TB is a whole different animal than the laters. The TB itself is wider and the lower half is also different. Obviously they changed the port locations (vac lines) and the harness and connectors have changed to boot.

The early 90 TB will not work on your 91 without modifcations. It would be your best bet to find a newer TB if this other TB you have found is an ealry style. (IMO)

 

[TSIkw]

It has the 4 vac lines on top so i guess i should work...i think the FIAV in my TB is bad so want to swap it out to see.

I can get another one off a '91 if this one doesn't work either.

 

[DSM90AWD]

It has the 4 vac lines on top so i guess i should work...i think the FIAV in my TB is bad so want to swap it out to see

As an FYI, elimination of the FAIV is a very easy and cheap (or free) mod. The FAIV's only purpose in life is to boost your RPMs a bit on a cold starts, though at risk is vacume leaks, ruptured water lines (happend to me) from/to the TB and heat transfer from said water lines to the TB.

Your ISC will still be able to regulate idle speed, unless of course you want to get rid of that too

 

[TSIkw]

If neither of the throttle bodies work i may block off the FIAV. My only concern is that i live in Central NY and it gets cold here. There will be a lot of cold starts this winter and i wasn't sure how badly it would effect start-up.

Also, if you know of any how-to's on blocking it off please let me know. The one on Vfaq doesn't open up.

 

[fourreGsixty3]

Block off plate is $20 on SBR>>> http://www.slowboyracing.com/Newsletterinfo/news-aug14.htm, or you can make your own with the specs of the ones they use, or $50 for FFWD to fill it>>> http://www.ffwdconnection.com/flow.shtml

Dustin

 

[TSIkw]

That sounds more promising to me. I see on the Slowboy link there is a FIAV blockoff plate and a FIAV bypass plate. Which would i need and why would you want to do one over the other?

 

[TSIkw]

Nevermind. All i had to do was click on the pic and it tells me the difference.

 

[fourreGsixty3]

SBRs block off plate is for if you have removed the ISC, and their by-pass plate is for if you are retaining the ISC.

Dustin