88/89 Vette throttle body vacuum line routing ..need pics
04-18-2010, 09:15 PM
#1
Melting Slicks
Thread Starter
88/89 Vette throttle body vacuum line routing ..need pics
Can anyone post picture of the correct routing of the line in this picture. I broke some of the hard lines and had to repair so the fit isnt correct...need some help. It the nipple in the middle..the line comes from under the plenum. This is the one in the middle below the pass PCV line and the bottom coolant line. Also , on a side note, the torx head runner bolt you see broke as I tightened it, gonna have to drill it out, is it a different length than the others?
here is the fitting on a diagram I need help with
here is the fitting on a diagram I need help with
Last edited by corvette95; 04-18-2010 at 09:23 PM.
04-18-2010, 10:22 PM
#2
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Well I dont have a picture at the moment but the middle line under the pcv tap goes under the plenum and throtle body then across the flange of the valve cover then to the wheel well which it ties into a a vacuum line with a rubber end which goes the the tank.
Hope this helps.
Hope this helps.
04-18-2010, 11:12 PM
#3
Race Director
If you drill too far into plenum, you'll end up punching thru and getting shavings inside. Probably best to remove it....Or, if you insist on trying it while mounted, I could measure the plenum's bolt hole depth for you -- so you don't go too deep (and into the plenum).
04-19-2010, 05:43 PM
#5
Race Director
Hope this pic helps.... Its a molded hose that goes from the valve cover, UNDER the outside of the runners, along the inside of the injector harness, and up to the TB. (Hose marked in yellow). The spark-plug-like boot is it's other end -- the end that plugs into the TB nipple.
Note: I will delete this pic after you have it.
Note: I will delete this pic after you have it.
Last edited by GREGGPENN; 04-19-2010 at 05:45 PM.
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gasandvetteman (02-07-2019)
04-20-2010, 08:31 AM
#6
Melting Slicks
Thread Starter
Hope this pic helps.... Its a molded hose that goes from the valve cover, UNDER the outside of the runners, along the inside of the injector harness, and up to the TB. (Hose marked in yellow). The spark-plug-like boot is it's other end -- the end that plugs into the TB nipple.
Note: I will delete this pic after you have it.
Note: I will delete this pic after you have it.
I got the pic..it DOES help....thank you. The line that goes from under the right (pass) runner then turns into the throttle body is the major one I am having trouble getting it to turn right. I wonder if I have the wrong elbow on it.
04-25-2016, 02:58 PM
#9
Drifting
I have 89 also
On the throttle body, pass side, large nipple goes to valve cover ccv valve on pass side
One below the large vaccaum nipple above goes to vaccaum in connection on charcoal can selenoid
One under throttle body is split line, one goes down to tank pressure valve ' the other end of split line goes to egr solenoid valve which is attached to t-stat housing
Out of EGR selenoid line goes to egr valve
On the throttle body, pass side, large nipple goes to valve cover ccv valve on pass side
One below the large vaccaum nipple above goes to vaccaum in connection on charcoal can selenoid
One under throttle body is split line, one goes down to tank pressure valve ' the other end of split line goes to egr solenoid valve which is attached to t-stat housing
Out of EGR selenoid line goes to egr valve
Last edited by mlm0; 04-25-2016 at 03:00 PM.
04-25-2016, 03:21 PM
#10
I have 89 also
On the throttle body, pass side, large nipple goes to valve cover ccv valve on pass side
One below the large vaccaum nipple above goes to vaccaum in connection on charcoal can selenoid
One under throttle body is split line, one goes down to tank pressure valve ' the other end of split line goes to egr solenoid valve which is attached to t-stat housing
Out of EGR selenoid line goes to egr valve
On the throttle body, pass side, large nipple goes to valve cover ccv valve on pass side
One below the large vaccaum nipple above goes to vaccaum in connection on charcoal can selenoid
One under throttle body is split line, one goes down to tank pressure valve ' the other end of split line goes to egr solenoid valve which is attached to t-stat housing
Out of EGR selenoid line goes to egr valve
04-25-2016, 03:48 PM
#11
Drifting
I believe this OP should have his problem resolved 4/2010 posting. I intentioned this "thread" for another more recent user because it has a correct vacuum routing label it appeared for his and might ave been a "good read" for him. I meant this thread as only a reference.
