help me out here,PLEASE?
09-18-2002, 06:35 PM
#1
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help me out here,PLEASE?
hey guy's ,I was wondering ...........I picked up another tpi system today(why,i don't know) but any how,my throttle body has 3 lines right next to the tps. This other one has only two,Whats the difference?And could someone please tell me what pic # 2 is?(it was on the other tpi system)and how do i tell what year tpi system i picked up today?
09-18-2002, 08:56 PM
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As for the year, get the number off the fuel rail or the injectors and check the numers at http://iroc.fbody.com/
It can tell you what year / engine it came off of.
As for the 2nd pic, if those are 2 hard vacuum lines coming off of it, and it has a plug going to it, it looks to be the EGR solenoid.
One vacuum line goes to a vacuum port under the throttle body, the other line goes to the EGR valve. This is what the ECM used to cycle the EGR valve open and closed.
HTH
Chris
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It can tell you what year / engine it came off of.
As for the 2nd pic, if those are 2 hard vacuum lines coming off of it, and it has a plug going to it, it looks to be the EGR solenoid.
One vacuum line goes to a vacuum port under the throttle body, the other line goes to the EGR valve. This is what the ECM used to cycle the EGR valve open and closed.
HTH
Chris
85 IROC
not a bad score for next to nothing
09-19-2002, 11:59 PM
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Car: 1972 LT1 Corvette
Engine: 350 HO
Transmission: M22 Heavy Duty 4 Spd
Axle/Gears: 336
Three tubes, 2 for water flow 1 for PCV valve. Two tubes, 2 for water flow. The 2 tube throttle body would more than likely be for an LT1 intake. The PCV valve in mounted into the intake on the drivers side and connects with a short 180* piece of tubing to a port an inch or so away. Does not go to the throttle body.
09-20-2002, 11:20 AM
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So can i replace the throttle body that i have (3 lines) with the 2 line throttle body and just get a small breather for the valve cover instead of having that line hooked up?
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09-20-2002, 11:20 PM
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Car: 1972 LT1 Corvette
Engine: 350 HO
Transmission: M22 Heavy Duty 4 Spd
Axle/Gears: 336
I would not reccomend doing that. May not get adequate air flow through engine. This could cause pressure build up and create oil blowby. By the way, is picture #1 the TB you're saying has only 2 tubes? I see 3. The 2 large ones are for water, the small one for the PCV valve. Also, if the other was made for an LT1 intake, the throttle cable connection is different.
