385IN2005

If I'm deleting the cold start injector on an 88 and earlier TPI system, can I use the later 89-92 runners without the cold start privision and without the small tube?
Is that tube strictly to feed air to the cold start injector, or does it also play a role in the function of the IAC?

TPI setup will consist of:
-'87 plenum
-'87 base
-'87 throttle body
-'89-92 runners?

Thanks!

John 89 Formula

that is the egr crossover tube, it should be present on either type of runners.

385IN2005

Well, the stock '89 driver side runner doesn't have that tube at all and if you buy '89-92 slp runners, it is blocked off at both ends of the tube.

John 89 Formula

Both of my 89 'birds and my 86 Z all had it, I never seen one that hasn't.

Twin_Turbo

iTrader: (25)

The tube on the drivers side is for the cold start injector and as such, not present on 89? up. The passenger side EGR tube is there on all of them

385IN2005

So, the driver side tube isn't needed if you've deleted your cold start injector, right? I can use the 89-up slp runners with the older style plenum?

385IN2005

Here are two pictures of my 1989-92 TPI runners. No driver side tube.

John 89 Formula

my bad, the egr tube is on the passenger side, it's been a few years since i've actually looked at one

87TTops

You can see where they delete the cold start tube. You're good to go.