Plenum hoses
Thread Starter
Pro
Joined: Nov 2006
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From: Ocean City Maryland
Plenum hoses
OK all On the right rear side of the engine throttle plenum there are to hoses, I am getting ready to change out my injector as the diagnosis to me for hard starting was to "a leak of one or more of my injectors and @ 1400.00 we can repair this? That is the background, anyhow got everything torn down to replace the injector myself but I noticed in the manual that it tells you to mark those two lines left and right but when I pull the throttlebody up the left one is capped off. Can't find anything on the manual that tells me where they go so I need help!!
Thanks,
Manny
Thanks,
Manny
Pro
Joined: Nov 2006
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From: Plano TX
I'm not sure what year you're referring to, but if it's just the vacuum on the plenum, I've never had an issue with them being one place or the other. I've seen pictures with people having the vacuum lines both ways.
I'm not really sure what you mean by "when I pull the throttlebody up the left one is capped off."
Does this mean it's capped at the TB on yours?
If it's working fine, I think I'd just mark them and lay them to the side and not worry about it personally.
I'm not really sure what you mean by "when I pull the throttlebody up the left one is capped off."
Does this mean it's capped at the TB on yours?
If it's working fine, I think I'd just mark them and lay them to the side and not worry about it personally.
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
Sorry, not sure which hoses you are needing. Perhaps looking at post #7 in THIS thread will help.
EDIT: Also post the year of your Corvette. These vacuum lines seemed to have changed location from year to year.... depending.
EDIT: Also post the year of your Corvette. These vacuum lines seemed to have changed location from year to year.... depending.
Last edited by RRT vette; May 29, 2007 at 10:55 PM.
Team Owner
Joined: Jan 2003
Posts: 20,293
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From: Summerland B.C. Canada
Can't think of any hose that you would need to mark left or right. The 2 vac lines at back of plenum, don't need marking, same vac source. The hoses on pass side of TB are vertical and different sizes(one coolant, one air intake for PCV) and then there is the EGR vac line on bottom drivers side of TB.
Last edited by AGENT 86; May 29, 2007 at 11:54 PM.
Pro
Joined: Nov 2006
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From: Plano TX
I've ALWAYS wondered why it's noted to "mark" the hoses... I just do it out of habit. But I mean come on, there's nothing special about where the hoses connect other than if 1 is smaller than the other. It just looks to me like the vacuum is the same regardless because it's pulled from the same exact spot.
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Thread Starter
Pro
Joined: Nov 2006
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From: Ocean City Maryland
Team Owner
Joined: Jan 2003
Posts: 20,293
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From: Summerland B.C. Canada
Here's a little breakdown.
vac port #1 fuel reg and air diverter solenoids
vac port #2 goes to check valve at back of motor, from there it tees off, one to HVAC via the wire harness, and the other to vacuum storage tank, also cruise control if you have it.
vac port #1 fuel reg and air diverter solenoids
vac port #2 goes to check valve at back of motor, from there it tees off, one to HVAC via the wire harness, and the other to vacuum storage tank, also cruise control if you have it.
Thread Starter
Pro
Joined: Nov 2006
Posts: 727
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From: Ocean City Maryland
Thanks very much for your assist. I have the plenum off right now and am about ready do pull the fuel rails and replace the injectors